General Description
The MAX4356 is a 16 ✕16 highly integrated video
crosspoint switch matrix with input and output buffers
and On-Screen Display (OSD) Insertion. This device
operates from dual ±3V to ±5V supplies or from a sin-
gle +5V supply. Digital logic is supplied from an inde-
pendent single +2.7V to +5.5V supply. Individual
outputs can be switched between an input video signal
source and OSD information through an internal, dedi-
cated fast 2:1 mux (40ns switching times) located
before the output buffer. All inputs and outputs are
buffered, with all outputs able to drive standard 75Ω
reverse-terminated video loads.
The switch matrix configuration and output buffer gain
are programmed via an SPI/QSPI™-compatible, three-
wire serial interface and initialized with a single update
signal. The unique serial interface operates in two
modes facilitating both fast updates and initialization.
On power-up, all outputs are initialized in the disabled
state to avoid output conflicts in large-array configura-
tions.
Superior flexibility, high integration, and space-saving
packaging make this nonblocking switch matrix ideal
for routing video signals in security and video-on-
demand systems.
The MAX4356 is available in a 128-pin TQFP package
and specified over an extended -40°C to 85°C temper-
ature range. Applications
Security Systems
Video Routing
Video-on-Demand Systems
Features
♦16 ✕16 Nonblocking Matrix with Buffered Inputs
and Outputs
♦Operates from ±3V, ±5V, or +5V Supplies
♦Individually Programmable Output Buffer Gain
(AV= +1V/V or +2V/V)
♦High-Impedance Output Disable for Wired-OR
Connections
♦Fast-Switching (40ns) 2:1 OSD Insertion Mux
♦0.1dB Gain Flatness to 14MHz
♦-62dB Crosstalk, -110dB Isolation at 6MHz
♦0.02%/0.12° Differential Gain/Differential Phase
Error
♦Low 195mW Power Consumption (0.76mW per
Point)
MAX4356
16x16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
________________________________________________________________ Maxim Integrated Products 1
Ordering Information
OUT0
OSDFILL0
OSDKEY0
OSDFILL1
OSDKEY1
OSDFILL15
OSDKEY15
OUT1
OUT15
IN0
CAMERAS
IN1
IN15
MONITOR
MONITOR
MONITOR
MAX4356
OSD GENERATOR
MAX4356
16 x 16
SWITCH MATRIX
POWER-ON
RESET
SERIAL
INTERFACE
THERMAL
SHUTDOWN
DECODE LOGIC
DISABLE ALL OUTPUTS
LATCHES
256 16 16
MATRIX REGISTER
96 BITS
UPDATE REGISTER
16 BITS
2:1
OSD
MUX
ENABLE/DISABLE
AV*
AV*
AV*
AV*
*AV = +1V/V OR +2V/V
A0-A3 MODE
IN0
IN1
IN2
IN15
DIN
SCLK
UPDATE
CE
RESET
OSDKEY0 OSDKEY15
OSDKEY1
OSDFILL0 OSDFILL15
OUT0
OUT1
OUT2
OUT15
VCC
VEE
DGND
VDD
DOUT
AOUT
OSDFILL1
AGND
Typical Operating Circuit
Functional Diagram
19-2113; Rev 0; 8/01
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
PART
TEMP. RANGE
PIN-PACKAGE
MAX4356ECD
-40°C to +85°C
128 TQFP
SPI and QSPI are trademarks of Motorola, Inc.
Pin Configuration appears at end of data sheet.
MAX4356
16x16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS—DUAL SUPPLIES ±5V
(VCC = +5V, VEE = -5V, VDD = +5V, AGND = DGND = 0, VIN_= 0, VOSDFILL_ = 0, RL= 150Ωto AGND, and TA= TMIN to TMAX,
unless otherwise noted. Typical values are at TA= +25°C.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Analog Supply Voltage (VCC - VEE).....................................+11V
Digital Supply Voltage (VDD - DGND) ...................................+6V
Analog Supplies to Analog Ground
(VCC - AGND) and (AGND - VEE)......................................+6V
Analog Ground to Digital Ground .........................-0.3V to +0.3V
IN_, OSDFILL_ Voltage Range........ (VCC + 0.3V) to (VEE - 0.3V)
OUT_ Short-Circuit Duration to AGND, VCC, or VEE......Indefinite
SCLK, CE, UPDATE, MODE, A_, DIN, DOUT,
RESET, AOUT, OSDKEY_.......(VDD + 0.3V) to (DGND - 0.3V)
Current into Any Analog Input Pin (IN_, OSDFILL_).........±50mA
Current into Any Analog Output Pin (OUT_).....................±75mA
Continuous Power Dissipation (TA= +70°C)
128-Pin TQFP (derate 25mW/°C above +70°C).................2W
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s)................................ +300°C
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Operating Supply Voltage
Range
VCC
-
VEE
Guaranteed by PSRR test
4.5
10.5
V
Logic Supply Voltage Range
VDD to
DGND
2.7
5.5
V
(VEE + 2.5V) < VIN
_
< (VCC - 2.5V),
AV = +1V/V, RL = 150Ω
0.97
0.995
1
(VEE + 2.5V) < VIN
_
< (VCC - 2.5V),
AV = +1V/V, RL = 10kΩ
0.99
0.999
1
(VEE + 3.75V) < VIN
_
< (VCC - 3.75V),
AV = +2V/V, RL = 150Ω
1.92
1.996
2.08
(VEE + 3.75V) < VIN
_
< (VCC - 3.75V)
AV = +2V/V, RL = 10kΩ
1.94
2.008
2.06
Gain (Note 1)
AV
(VEE + 1V) < VIN
_
< (VCC - 1.2V),
AV = +1V/V, RL = 10kΩ
0.95
0.994
1
V/V
RL = 10kΩ
0.5
1.5
Gain Matching
(Channel to Channel)
RL = 150Ω
0.5
2
%
MAX4356
16x16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
_______________________________________________________________________________________ 3
DC ELECTRICAL CHARACTERISTICS—DUAL SUPPLIES ±5V (continued)
(VCC = +5V, VEE = -5V, VDD = +5V, AGND = DGND = 0, VIN_= 0, VOSDFILL_ = 0, RL= 150Ωto AGND, and TA= TMIN to TMAX,
unless otherwise noted. Typical values are at TA= +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Temperature Coefficient of Gain
TCAV
10
ppm/°C
RL = 10kΩ
V
E E
+ 1
V
C C
-
1.2
AV = +1V/V
RL = 150Ω
V
E E
+
2.5
V
C C
-
2.5
RL = 10kΩ
V
E E
+
3
V
C C
-
3.1
Input Voltage Range
VIN_
AV = +2V/V
RL = 150Ω
V
E E
+
3.75
V
C C
-
3.75
V
RL = 10kΩ
V
E E
+
1
V
C C
-
1.2
V
Output
Voltage Range
VOUT
RL = 150Ω
V
E E
+
2.5
V
C C
-
2.5
V
Input Bias Current
IB
4
11
µA
Input Resistance
RIN
_
(VEE + 1V) < VIN
_
< (VCC - 1.2V)
10
MΩ
AV = +1V/V
±5
±20
Output Offset Voltage
VOFFSET
AV = +2V/V
±10
±40
mV
Output Short-Circuit Current
ISC
Sinking or sourcing, RL = 1Ω
±40
mA
Enabled Output Impedance
ZOUT
(VEE + 1V) < VIN
_
< (VCC - 1.2V)
0.2
Ω
Output Leakage Current,
Disable Mode
IOD
(VEE + 1V) < VOUT
_
< (VCC - 1.2V)
0.004
1
µA
DC Power-Supply Rejection
Ratio
PSRR
4.5V < (VCC
- VEE) < 10.5V
60
70
dB
Outputs enabled,
TA = +25°C
110
160
Outputs enabled
185
ICC
RL = ∞
Outputs disabled
60
80
Outputs enabled,
TA = +25°C
105
160
Outputs enabled
185
IEE
RL = ∞
Outputs disabled
55
80
Quiescent
Supply Current
IDD
4
8
mA
MAX4356
16x16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
4 _______________________________________________________________________________________
DC ELECTRICAL CHARACTERISTICS—DUAL SUPPLIES ±3V
(VCC = +3V, VEE = -3V, VDD = +3V, AGND = DGND = 0, VIN_ = 0, VOSDFILL_ = 0, RL= 150Ωto AGND, and TA= TMIN to TMAX,
unless otherwise noted. Typical values are at TA= +25°C.)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Operating Supply Voltage
Range
VCC - VEE
Guaranteed by PSRR test 4.5
10.5
V
Logic Supply Voltage Range VDD to
DGND 2.7 5.5 V
(VEE + 1V) < VIN_ < (VCC - 1.2V),
AV = +1V/V, RL = 150Ω
0.94 0.983
1
(VEE + 1V) < VIN_ < (VCC - 1.2V),
AV = +1V/V, RL = 10kΩ
0.96 0.993
1
(VEE + 2V) < VIN_ < (VCC - 2.1V),
AV = +2V/V, RL = 150Ω
1.92 1.985 2.08
Gain (Note 1) AV
(VEE + 2V) < VIN_ < (VCC - 2.1V)
AV = +2V/V, RL = 10kΩ
1.94 2.000 2.06
V/V
RL = 10kΩ 0.5 1.5
Gain Matching
(Channel to Channel)
RL = 150Ω 0.5 2 %
Temperature Coefficient of
Gain TCAV 10
ppm/°C
RL = 10kΩ VEE +
1
VCC -
1.2
AV = +1V/V
RL = 150Ω VEE +
1
VCC -
1.2
RL = 10kΩ VEE +
2
VCC -
2.1
Input Voltage Range VIN_
AV = +2V/V
RL = 150Ω VEE +
2
VCC -
2.1
V
RL = 10kΩ VEE +
1
VCC -
1.2
Output Voltage Range VOUT
RL = 150Ω VEE +
1
VCC -
1.2
V
Input Bias Current IB 4 11 µA
Input Resistance RIN (VEE + 1V) < VIN_ < (VCC - 1.2V) 10 MΩ
AV = +1V/V ±5
±20
Output Offset
Voltage
VOFFSET
AV = +2V/V
±10 ±40
mV
MAX4356
16x16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
_______________________________________________________________________________________ 5
DC ELECTRICAL CHARACTERISTICS—DUAL SUPPLIES ±3V (continued)
(VCC = +3V, VEE = -3V, VDD = +3V, AGND = DGND = 0, VIN_ = 0, VOSDFILL_ = 0, RL= 150Ωto AGND, and TA= TMIN to TMAX,
unless otherwise noted. Typical values are at TA= +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
Output Short-Circuit Current ISC Sinking or sourcing, RL = 1Ω ±40 mA
Enabled Output Impedance ZOUT (VEE + 1V) < VIN_ < (VCC - 1.2V) 0.2 Ω
Output Leakage Current,
Disable Mode IOD (VEE + 1V) < VOUT_ < (VCC - 1.2V)
0.004
1 µA
DC Power-Supply Rejection
Ratio PSRR 4.5V < (VCC - VEE) < 10.5V 60 75 dB
Outputs enabled 95
ICC RL = ∞ Outputs disabled 50
Outputs enabled 90
IEE RL = ∞ Outputs disabled 45
Quiescent
Supply
Current
IDD 3
mA
DC ELECTRICAL CHARACTERISTICS—SINGLE SUPPLY +5V
(VCC = +5V, VEE = 0, VDD = +5V, AGND = DGND = 0, VIN_ = VOSDFILL_ = +1.75V, AV= +1V/V, RL= 150Ωto AGND, and TA= TMIN
to TMAX, unless otherwise noted. Typical values are at TA= +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Operating Supply Voltage
Range VCC Guaranteed by PSRR test
4.5
5.5 V
Logic-Supply Voltage Range VDD to
DGND
2.7
5.5 V
(VEE + 1V) < VIN < (VCC - 2.5V),
AV = +1V/V, RL = 150Ω
0.94 0.995
1
Gain (Note 1) AV (VEE + 1V) < VIN < (VCC - 1.2V),
AV = +1V/V, RL = 10kΩ
0.94 0.995
1V/V
RL = 10kΩ 0.5 3
Gain Matching (Channel to
Channel)
RL = 150Ω 0.5 3 %
Temperature Coefficient of Gain
TCAV 10
ppm/°
C
RL = 10kΩ VEE
+ 1
VCC
- 1.2
Input Voltage Range VIN AV = +1V/V RL = 150Ω VEE
+ 1
VCC
- 2.5
V
MAX4356
16x16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
6 _______________________________________________________________________________________
DC ELECTRICAL CHARACTERISTICS—SINGLE SUPPLY +5V (continued)
(VCC = +5V, VEE = 0, VDD = +5V, AGND = DGND = 0, VIN_ = VOSDFILL_ = +1.75V, AV= +1V/V, RL= 150Ωto AGND, and TA= TMIN
to TMAX, unless otherwise noted. Typical values are at TA= +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
AV = +1V/V, RL = 10kΩ VEE
+ 1
VCC
- 1.2
Output Voltage
Range VOUT AV = +1V/V, RL = 150Ω VEE
+ 1
VCC
- 2.5
V
Input Bias Current IB 4 11 µA
Input Resistance RIN VEE + 1V < VIN – < VCC - 1.2V 10 MΩ
Output Offset Voltage
VOFFSET
AV = +1V/V ±10
±40
mV
Output Short-Circuit Current ISC Sinking or sourcing, RL = 1Ω
±35 mA
Enabled Output Impedance ZOUT (VEE + 1V) < VIN– < (VCC - 1.2V)
0.2 Ω
Output Leakage Current,
Disable Mode IOD (VEE + 1V) < VOUT– < (VCC - 1.2V)
0.004
1 µA
DC Power-Supply Rejection
Ratio PSRR 4.5V < (VCC - VEE) < 5.5V 50 65 dB
Outputs enabled, TA = +25°C 85
ICC RL = ∞ Outputs disabled 35
Outputs enabled, TA = +25°C 80
IEE RL = ∞ Outputs disabled 30
Quiescent Supply
Current
IDD 4
mA
MAX4356
16x16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
_______________________________________________________________________________________ 7
LOGIC-LEVEL CHARACTERISTICS
(VCC - VEE) = +4.5V to +10.5V, VDD = +2.7V to +5.5V, AGND = DGND = 0, VIN_ = VOSDFILL_ = 0, RL= 150Ωto AGND, and
TA= TMIN to TMAX, unless otherwise noted. Typical values are at TA= +25°C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
VDD = +5.0V 3
Input Voltage High Level VIH VDD = +2.7V 2 V
VDD = +5.0V 0.8
Input Voltage
Low Level VIL VDD = +2.7V 0.6 V
Excluding RESET -1
0.01
1
Input Current
High Level IIH VI > 2V RESET -30 -20 µA
Excluding RESET -1
0.01
1
Input Current
Low Level IIL VI < 1V RESET
-300 -235
µA
ISOURCE = 1mA, VDD = +5V 4.7 4.9
Output Voltage High
Level VOH ISOURCE = 1mA, VDD = +3V 2.7 2.9 V
ISINK = 1mA, VDD = +5V 0.1 0.3
Output Voltage Low
Level VOL ISINK = 1mA, VDD = +3V 0.1 0.3 V
VDD = +5V, VO = +4.9V 1 4
Output Current High
Level IOH VDD = +3V, VO = +2.7V 1 8 mA
VDD = +5V, VO = +0.1V 1 4
Output Current
Low Level IOL VDD = +3V, VO = +0.3V 1 8 mA
AC ELECTRICAL CHARACTERISTICS—DUAL SUPPLIES ±5V
(VCC = +5V, VEE = -5V, VDD = +5V, AGND = DGND = 0, VIN_ = VOSDFILL_ = 0, RL= 150Ωto AGND, and TA= +25°C, unless other-
wise noted.)
PARAMETER SYMBOL CONDITIONS
MIN
TYP
MAX
UNITS
AV = +1V/V
110
Small-Signal -3dB
Bandwidth BWSS
VOUT = 20mVp-p
AV = +2V/V 78
MHz
AV = +1V/V 80
Medium-Signal -3dB
Bandwidth BWMS VOUT_ =
200mVp-p AV = +2V/V 75
MHz
AV = +1V/V 40
Large-Signal -3dB
Bandwidth BWLS VOUT_ = 2Vp-p AV = +2V/V 50
MHz
AV = +1V/V 14
Small-Signal 0.1dB
Bandwidth
BW0.1dB-SS VOUT
_
= 20mVp-p
AV = +2V/V 11
MHz
AV = +1V/V 14
Medium-Signal
0.1dB Bandwidth
BW0.1dB-MS
VOUT_ =
200mVp-p AV = +2V/V 11
MHz
AV = +1V/V 14
Large-Signal 0.1dB
Bandwidth BW0.1dB-LS VOUT_ = 2Vp-p AV = +2V/V 11
MHz
VOUT_ = 2V step,
AV = +1V/V
150
Slew Rate SR VOUT_= 2V step,
AV = +2V/V
150
V/µs
MAX4356
16x16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
8 _______________________________________________________________________________________
AC ELECTRICAL CHARACTERISTICS—DUAL SUPPLIES ±5V (continued)
(VCC = +5V, VEE = -5V, VDD = +5V, AGND = DGND = 0, VIN_ = VOSDFILL_ = 0, RL= 150Ωto AGND, AV= +1V/V, and TA= +25°C,
unless otherwise noted.)
PARAMETER SYMBOL CONDITIONS
MIN TYP MAX
UNITS
AV = +1V/V
60
Settling Time tS 0.1% VOUT_ = 0 to 2V
step AV = +2V/V 60
ns
AV = +1V/V 50
Switching Transient
(Glitch) (Note 3)
AV = +2V/V 45
mV
f = 100kHz 70
AC Power-Supply
Rejection Ratio
f = 1MHz 68
dB
RL = 1kΩ
0.002
Differential Gain
Error (Note 4)
RL = 150Ω
0.02
%
RL = 1kΩ
0.02
Differential Phase
Error (Note 4)
RL = 150Ω
0.12
d eg r ees
Crosstalk, All Hostile f = 6MHz -62 dB
Off-Isolation, Input-to-Output f = 6MHz
-110
dB
Input Noise Voltage Density en BW = 6MHz 73
µVRMS
Input Capacitance CIN 5 pF
Disabled Output
Capacitance Amplifier in disable mode 3 pF
Capacitive Load at 3dB
Output Peaking 30 pF
Output enabled 3
Output Impedance ZOUT f = 6MHz Output disabled 4k
Ω
AC ELECTRICAL CHARACTERISTICS—DUAL SUPPLIES ±3V
(VCC = +3V, VEE = -3V, VDD = +3V, AGND = DGND = 0, VIN_= VOSDFILL_ = 0, RL= 150Ωto AGND, AV= +1V/V, and TA= +25°C,
unless otherwise noted.)
PARAMETER SYMBOL CONDITIONS
MIN TYP MAX
UNITS
AV = +1V/V
110
Small-Signal
-3dB Bandwidth BWSS VOUT_ =
20mVp-p AV = +2V/V 70
MHz
AV = +1V/V
110
Medium-Signal
-3dB Bandwidth BWMS VOUT_ =
200mVp-p AV = +2V/V 70
MHz
AV = +1V/V 32
Large-Signal -3dB
Bandwidth BWLS VOUT_ = 2Vp-p AV = +2V/V 38
MHz
AV = +1V/V 12
Small-Signal
0.1dB Bandwidth
BW0.1dB-SS
VOUT_ =
20mVp-p AV = +2V/V 12
MHz
AV = +1V/V 12
Medium-Signal
0.1dB Bandwidth
BW0.1dB-MS
VOUT_ =
200mVp-p AV = +2V/V 12
MHz
AV = +1V/V 12
Large-Signal 0.1dB
Bandwidth
BW0.1dB-LS
VOUT_ = 2Vp-p AV = +2V/V 12
MHz
MAX4356
16x16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
_______________________________________________________________________________________ 9
AC ELECTRICAL CHARACTERISTICS—DUAL SUPPLIES ±3V (continued)
(VCC = +3V, VEE = -3V, VDD = +3V, AGND = DGND = 0, VIN_= VOSDFILL_ = 0, RL= 150Ωto AGND, AV= +1V/V, and TA= +25°C,
unless otherwise noted.)
PARAMETER SYMBOL CONDITIONS
MIN
TYP
MAX
UNITS
VOUT_ = 2V step
AV = +1V/V
125
Slew Rate SR VOUT_ = 2V step
AV = +2V/V
125
V/µs
AV = +1V/V 60
Settling Time tS 0.1%
VO = 0 to 2V step
AV = +2V/V 60
ns
AV = +1V/V 20
Switching Transient
(Glitch) (Note 3)
AV = +2V/V 20
mV
f = 100kHz 72
AC Power-Supply
Rejection Ratio
f = 1MHz 71
dB
RL = 1kΩ
0.02
Differential Gain Error
(Note 4)
RL = 150Ω
0.15
%
RL = 1kΩ
0.05
Differential Phase
Error (Note 4)
RL = 150Ω 0.2
d eg r ees
Crosstalk, All Hostile f = 6MHz -63 dB
Off-Isolation, Input to Output f = 6MHz
-112
dB
Input Noise Voltage Density en BW = 6MHz 73
µVRMS
Input Capacitance CIN_ 5 pF
Disabled Output Capacitance Amplifier in disable mode 3 pF
Capacitive Load at 3dB
Output Peaking 30 pF
Output enabled 3
Output Impedance ZOUT f =
6MHz
Output disabled 4k
Ω
MAX4356
16x16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
10 ______________________________________________________________________________________
AC ELECTRICAL CHARACTERISTICS—SINGLE SUPPLY +5V
(VCC = +5V, VEE = 0, VDD = +5V, AGND = DGND = 0, VIN_ = VOSDFILL_ = 1.75V, RL= 150Ωto AGND, AV= +1V/V, and TA=
+25°C, unless otherwise noted.)
PARAMETER SYMBOL CONDITIONS
MIN TYP MAX
UNITS
Small-Signal
-3dB Bandwidth BWSS VOUT_ = 20mVp-p 100
MHz
Medium-Signal -3dB
Bandwidth BWMS VOUT_ = 200mVp-p 100
MHz
Large-Signal
-3dB Bandwidth BWLS VOUT_ = 1.5Vp-p 40
MHz
Small-Signal
0.1dB Bandwidth BW0.1dB-SS VOUT_ = 20mVp-p 10
MHz
Medium-Signal
0.1dB Bandwidth BW0.1dB-MS VOUT_ = 200mVp-p 12
MHz
Large-Signal
0.1dB Bandwidth BW0.1dB-LS VOUT_ = 1.5Vp-p 14
MHz
Slew Rate SR VOUT_ = 2V step, AV = +1V/V 100
V/µs
Settling Time tS 0.1% VOUT_ = 0 to 2V step 60 ns
Switching Transient
(Glitch) 25 mV
f = 100kHz 70
AC Power-Supply
Rejection Ratio
f = 1MHz 69
dB
RL = 1kΩ 0.1
Differential Gain Error
(Note 4)
RL = 150Ω 0.2
%
RL = 1kΩ
0.05
Differential Phase
Error (Note 4)
RL = 150Ω 0.2
d eg r ees
Crosstalk, All Hostile f = 6MHz -63 dB
Off-Isolation, Input-to-
Output
f = 6MHz
-110
dB
Input Noise Voltage
Density
en BW = 6MHz 73
µVRMS
Input Capacitance CIN_ 5 pF
Disabled Output
Capacitance Amplifier in disable mode 3 pF
Capacitive Load at 3dB
Output Peaking 30 pF
Output enabled 3
Output
Impedance ZOUT f = 6MHz Output disabled 4k
Ω
MAX4356
16x16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
______________________________________________________________________________________ 11
SWITCHING CHARACTERISTICS
((VCC - VEE) = +4.5V to +10.5V, VDD = +2.7V to +5.5V, DGND = AGND = 0, VIN_ = VOSDFILL_ = 0 for dual supplies, VIN_ =
VOSDFILL_ = +1.75V for single supply, RL= 150Ωto AGND, CL= 100pF, AV= +1V/V, and TA= TMIN to TMAX, unless otherwise
noted. Typical values are at TA= +25°C. )
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Delay: UPDATE to Video Out
tPdUdVo
VIN = 0.5V step
200 450
ns
Delay: UPDATE to AOUT
tPdUdAo
MODE = 0, time to AOUT = low after
UPDATE = low 30
200
ns
VDD = +5V 40
Delay: OSDKEY_ to Output tPdOkVo/
tPdOfVo
VOUT = 0.5V step VDD = +3V 60
ns
Delay: SCLK to DOUT Valid tPdDo Logic state change in DOUT on active
SCLK edge 30 200 ns
Delay: Output Disable
tPdHOe
VOUT = 0.5V, 1kΩ pulldown to AGND
300 800
ns
Delay: Output Enable
tPdLOe
Output disabled, 1kΩ pulldown to AGND,
VIN = 0.5V
200 800
ns
Setup: CE to SCLK tSuCe
100
ns
Setup: DIN to SCLK tSuDi
100
ns
Hold Time: SCLK to DIN tHdDi
100
ns
Minimum High Time: SCLK
tMnHCk
100
ns
Minimum Low Time: SCLK
tMnLCk
100
ns
Minimum Low Time: UPDATE
tMnLUd
100
ns
Setup Time: UPDATE to SCLK
tSuHUd
Rising edge of UPDATE to falling edge of
SCLK
100
ns
Hold Time: SCLK to UPDATE
tHdHUd
Falling edge of SCLK to falling edge of
UPDATE
100
ns
Setup Time: MODE to SCLK tSuMd Minimum time from clock edge to MODE
with valid data clocking
100
ns
Hold Time: MODE to SCLK
tHdMd
Minimum time from clock edge to MODE
with valid data clocking
100
ns
Minimum Low Time: RESET
tMnLRst
300
ns
Delay: RESET tPdRst 10kΩ pulldown to AGND, 0.5V step
600
ns
Note 1: Associated output voltage may be determined by multiplying the input voltage by the specified gain (AV) and adding output
offset voltage. Gain is specified for IN_ and OSDFILL_ signal paths.
Note 2: Logic-level characteristics apply to the following pins: DIN, DOUT, SCLK, CE, UPDATE, RESET, A3–A0, MODE, AOUT, and
OSDKEY_.
Note 3: Switching transient settling time is guaranteed by the settling time (tS) specification. Switching transient is a result of updat-
ing the switch matrix.
Note 4: Input test signal: 3.58MHz sine wave of amplitude 40IRE superimposed on a linear ramp (0 to 100IRE). IRE is a unit of
video-signal amplitude developed by the International Radio Engineers: 140IRE = 1.0V.
Note 5: All devices are 100% production tested at TA= +25°C. Specifications over temperature limits are guaranteed by design.
MAX4356
16x16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
12 ______________________________________________________________________________________
SYMBOL TYPE DESCRIPTION
Ao Signal Address Valid Flag
(AOUT)
Ce Signal Clock Enable (CE)
Ck Signal Clock (SCLK)
Di Signal
Serial Data In (DIN)
Do Signal Serial Data Output
(DOUT)
Md Signal MODE
Oe Signal Output enable
Rst Signal
Reset Input (RESET)
Ud Signal UPDATE
Vo Signal Video Out (OUT)
H Property
High- or Low-to-High
transition
Hd Property Hold
L Property Low- or High-to-Low
transition
Mn Property Minimum
Mx Property Maximum
Pd Property Propagation delay
Su Property Setup
Tr Property Transition
W Property Width
Symbol Definitions Naming Conventions
•All parameters with time units are given a "t" desig-
nation, with appropriate subscript modifiers.
•Propagation delays for clocked signals are from the
active edge of clock.
•Propagation delay for level-sensitive signals is from
input to output at the 50% point of a transition.
•Setup and hold times are measured from the 50%
point of signal transition to the 50% point of the
clocking signal transition.
•Setup time refers to any signal that must be stable
before the active clock edge, even if the signal is
not latched or clocked itself.
•Hold time refers to any signal that must be stable
during and after active clock edge, even if the sig-
nal is not latched or clocked.
•Propagation delays to unobservable internal signals
are modified to setup and hold designations
applied to observable I/O signals.
MAX4356
16x16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
______________________________________________________________________________________ 13
DATA AND CONTROL TIMING
OSD: KEY AND FILL TIMING
Ce: CE
Of: OSDFILLi
IN_
VIDEO SOURCE
(SELECTED INPUT)
VIDEO OUTPUT
(WITH SUPERIMPOSED OSD)
OUTi
Ok: OSDKEYi
Di: DIN
Do: DOUT
Ud: UPDATE
Vo: OUT_
Rst: RESET
Oe: OUTPUT ENABLE
Ao: AOUT
tSuCe tHdCe
tMnHCk tMnLCk tSuDi
tHdDi
tPdDo tHdUd
tMnLUd tSuUd
tPdHOkVo tPdLOfVo
tPdLOkVo
Hi-Z tPdUdVo
tWTrVo
tPdUdAo tPdRstVo
tMnlRst
tPdHOeVo tPdLOeVo
Hi-Z
TIMING PARAMETER DEFINITIONS
NAME DESCRIPTION
tPdUdVo Delay: Update to Video Out
tPdUdAo Delay: UPDATE to Aout
tPdOkVo Delay: OSD Key to Video Output
tPdOfVo Delay: OSD Fill to Video Output
tPdDo Delay: Clk to Data Out
tPdHOeVo Delay: Output Enable to Video Output
(High: Disable)
tPdLOeVo Delay: Output Enable to Video Output
(Low: Enable)
tSuCe Setup: Clock Enable to Clock
tSuDi Setup Time: Data In to Clock
TIMING PARAMETER DEFINITIONS
NAME DESCRIPTION
tHdDi Hold Time: Clock to Data In
tMnHCk Min High Time: Clk
tMnLCk Min Low Time: Clk
tMnLUd Min Low Time: Update
tSuHUd Setup Time: UPDATE to Clk with UPDATE High
Not Valid Setup Time: UPDATE to Clk with UPDATE Low
tHdHUd Hold Time: Clk to UPDATE with UPDATE high
Not Valid Hold Time: Clk to UPDATE with UPDATE Low
tPdDiDo Asynchronous Delay: Data In to Data Out
tMnMd Min Low Time: MODE
tMxTr Max Rise Time: Clk, Update
tMnLRst Min Low Time: Reset
tPdRstVo Delay: Reset to Video Output
Ck: SCLK
Figure 1. Timing Diagram
MAX4356
16x16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
14 ______________________________________________________________________________________
Typical Operating Characteristics—Dual Supplies ±5V
(VCC = +5V and VEE = -5V, VDD = +5V, AGND = DGND = 0, VIN_ = 0, RL= 150Ωto AGND, and TA = +25°C, unless otherwise
noted.)
3
-7 0.1 1 10 100 1000
LARGE-SIGNAL FREQUENCY RESPONSE
-5
MAX4356 toc01
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
-3
-1
1
0
-2
-4
-6
2RL = 150Ω
AV = +2V/V
AV = +1V/V
3
-7 0.1 1 10 100 1000
MEDIUM-SIGNAL FREQUENCY RESPONSE
-5
MAX4356 toc02
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
-3
-1
1
0
-2
-4
-6
2RL = 150Ω
AV = +1V/V
AV = +2V/V
3
-7 0.1 1 10 100 1000
SMALL-SIGNAL FREQUENCY RESPONSE
-5
MAX4356 toc03
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
-3
-1
1
0
-2
-4
-6
2RL = 150Ω
AV = +1V/V
AV = +2V/V
3
-7 0.1 1 10 100 1000
LARGE-SIGNAL FREQUENCY RESPONSE
-5
MAX4356 toc04
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
-3
-1
1
0
-2
-4
-6
2RL = 1kΩ
AV = +1V/V
AV = +2V/V
3
-7 0.1 1 10 100 1000
MEDIUM-SIGNAL FREQUENCY RESPONSE
-5
MAX4356 toc05
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
-3
-1
1
0
-2
-4
-6
2RL = 1kΩ
AV = +2V/V
AV = +1V/V
3
-7 0.1 1 10 100 1000
SMALL-SIGNAL FREQUENCY RESPONSE
-5
MAX4356 toc06
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
-3
-1
1
0
-2
-4
-6
2RL = 1kΩ
AV = +1V/V
AV = +2V/V
0.3
-0.7 0.1 1 10 100 1000
LARGE-SIGNAL GAIN FLATNESS
vs. FREQUENCY
-0.5
MAX4356 toc07
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
-0.3
-0.1
0.1
0
-0.2
-0.4
-0.6
0.2
AV = +1V/V
AV = +2V/V
RL = 150Ω
0.3
-0.7 0.1 1 10 100 1000
LARGE-SIGNAL GAIN FLATNESS
vs. FREQUENCY
-0.5
MAX4356 toc08
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
-0.3
-0.1
0.1
0
-0.2
-0.4
-0.6
0.2
AV = +1V/V
AV = +2V/V
RL = 1kΩ
3
-7 0.1 1 10 100 1000
LARGE-SIGNAL FREQUENCY RESPONSE
(AV = +1V/V)
-5
MAX4356 toc09
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
-3
-1
1
0
-2
-4
-6
2RL = 150Ω
CL = 30pF
CL = 15pF
CL = 45pF
MAX4356
16x16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
______________________________________________________________________________________ 15
Typical Operating Characteristics—Dual Supplies ±5V (continued)
(VCC = +5V and VEE = -5V, VDD = +5V, AGND = DGND = 0, VIN_ = 0, RL= 150Ωto AGND, and TA = +25°C, unless otherwise
noted.)
3
-7 0.1 1 10 100 1000
LARGE-SIGNAL FREQUENCY RESPONSE
(AV = +2V/V)
-5
MAX4356 toc10
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
-3
-1
1
0
-2
-4
-6
2RL = 150Ω
CL = 30pF
CL = 15pF
CL = 45pF
0.1 101 100 1000
MEDIUM-SIGNAL FREQUENCY RESPONSE
(AV = +1V/V)
MAX4356 toc11
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
-10
-5
5
0
10
15
CL = 45pF
CL = 15pF
CL = 30pF
7
30.1 1 10 100 1000
MEDIUM-SIGNAL FREQUENCY RESPONSE
(AV = +2V/V)
1
MAX4356 toc12
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
1
3
5
4
2
0
2
6
CL = 15pF
CL = 45pF
CL = 30pF
-40
-100 0.1 10 1001 1000
MAX4356 toc13
FREQUENCY (MHz)
CROSSTALK (dB)
-90
-80
-70
-60
-50
CROSSTALK vs. FREQUENCY
AV = +1V/V
-40
-100 0.1 10 1001 1000
MAX4356 toc14
FREQUENCY (MHz)
CROSSTALK (dB)
-90
-80
-70
-60
-50
CROSSTALK vs. FREQUENCY
AV = +2V/V
-10
-100 0.1 100101
DISTORTION vs. FREQUENCY
-70
-90
-30
-50
0
-60
-80
-20
-40
MAX4356 toc15
FREQUENCY (MHz)
DISTORTION ( dBc)
AV = +1V/V
2ND HARMONIC
3RD HARMONIC
-10
-100 0.1 100101
DISTORTION vs. FREQUENCY
-70
-90
-30
-50
0
-60
-80
-20
-40
MAX4356 toc16
FREQUENCY (MHz)
DISTORTION ( dBc)
AV = +2V/V
2ND HARMONIC
3RD HARMONIC
0.1 101 100 1000
ENABLED-OUTPUT IMPEDANCE
vs. FREQUENCY
MAX4356 toc17
FREQUENCY (MHz)
OUTPUT IMPEDANCE (Ω)
1000
-0.1
1
10
100
1M
1100k 10M 100M1M 1G
MAX4356 toc18
FREQUENCY (Hz)
OUTPUT IMPEDANCE (Ω)
10
100
1k
10k
100k
DISABLED-OUTPUT IMPEDANCE
vs. FREQUENCY
MAX4356
16x16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
16 ______________________________________________________________________________________
Typical Operating Characteristics—Dual Supplies ±5V (continued)
(VCC = +5V and VEE = -5V, VDD = +5V, AGND = DGND = 0, VIN_ = 0, RL= 150Ωto AGND, and TA = +25°C, unless otherwise
noted.)
-40
-50
-60
-70
-80
-90
-100
-110
-120100k 10M 100M1M 1G
MAX4356 toc19
FREQUENCY (Hz)
OFF ISOLATION (dB)
OFF ISOLATION vs. FREQUENCY
10k 1M100k 10M 100M
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX4356 toc20
FREQUENCY (Hz)
PSRR (dB)
-75
-70
-60
-65
-55
-50
1000
110 10k 100k 1M100 1k 10M
INPUT VOLTAGE NOISE vs. FREQUENCY
100
MAX4356 toc21
FREQUENCY (Hz)
VOLTAGE NOISE (nV/√ Hz)
25ns/div
LARGE-SIGNAL PULSE RESPONSE
(AV = +1V/V)
INPUT
1V/div
OUTPUT
0.5V/div
MAX4356 toc22
25ns/div
LARGE-SIGNAL PULSE RESPONSE
(AV = +2V/V)
INPUT
0.5V/div
OUTPUT
0.5V/div
MAX4356 toc23
25ns/div
MEDIUM-SIGNAL PULSE RESPONSE
(AV = +1V/V)
INPUT
100mV/div
OUTPUT
50mV/div
MAX4356 toc24
25ns/div
MEDIUM-SIGNAL PULSE RESPONSE
(AV = +2V/V)
INPUT
50mV/div
OUTPUT
50mV/div
MAX4356 toc25
20ns/div
SWITCHING TIME
(AV = +1V/V)
VUPDATE
5V/div
VOUT
00mV/div
MAX4356 toc26
20ns/div
SWITCHING TIME
(AV = +2V/V)
VUPDATE
5V/div
VOUT
1V/div
MAX4356 toc27
MAX4356
16x16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
______________________________________________________________________________________ 17
Typical Operating Characteristics—Dual Supplies ±5V (continued)
(VCC = +5V and VEE = -5V, VDD = +5V, AGND = DGND = 0, VIN_ = 0, RL= 150Ωto AGND, and TA = +25°C, unless otherwise
noted.)
20ns/div
SWITCHING TRANSIENT (GLITCH)
(AV = +1V/V)
VUPDATE
5V/div
VOUT
25mV/div
MAX4356 toc28
20ns/div
SWITCHING TRANSIENT (GLITCH)
(AV = +2V/V)
VUPDATE
5V/div
VOUT
25mV/div
MAX4356 toc29
0
100
50
200
150
250
300
-15 -11 -9 -7-13 -5 -3 -1 135
OFFSET VOLTAGE DISTRIBUTION
MAX4356 toc30
OFFSET VOLTAGE (mV)
-0.05
0102030405060708090100
0102030405060708090100
DIFFERENTIAL GAIN AND PHASE
(RL = 150Ω)
0.00
0.00
-0.02
0.05
0.02
0.04
0.10
006
0.08
0.15
IRE
DIFF PHASE (°)DIFF GAIN (%)
MAX4356 toc31
0.01
0.00
0102030405060708090100
0102030405060708090100
DIFFERENTIAL GAIN AND PHASE
(RL = 1kΩ)
-0.004
0.02
-0.002
0.000
0.002
0.004
0.03
IRE
DIFF PHASE (°)DIFF GAIN (%)
MAX4356 toc32
-0.01
25ns/div
LARGE-SIGNAL PULSE RESPONSE WITH
CAPACITIVE LOAD (CL = 30pF, AV = +1V/V)
INPUT
1V/div
OUTPUT
0.5/Vdiv
MAX4356 toc33
25ns/div
LARGE-SIGNAL PULSE RESPONSE WITH
CAPACITIVE LOAD (CL = 30pF, AV = +2V/V)
INPUT
0.5V/div
OUTPUT
0.5/Vdiv
MAX4356 toc34
25ns/div
MEDIUM-SIGNAL PULSE RESPONSE WITH
CAPACITIVE LOAD (CL = 30pF, AV = +1V/V)
INPUT
100mV/div
OUTPUT
50mV/div
MAX4356 toc35
25ns/div
MEDIUM-SIGNAL PULSE RESPONSE WITH
CAPACITIVE LOAD (CL = 30pF, AV = +2V/V)
INPUT
50mV/div
OUTPUT
50mV/div
MAX4356 toc36
MAX4356
16x16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
18 ______________________________________________________________________________________
Typical Operating Characteristics—Dual Supplies ±5V (continued)
(VCC = +5V and VEE = -5V, VDD = +5V, AGND = DGND = 0, VIN_ = 0, RL= 150Ωto AGND, and TA = +25°C, unless otherwise
noted.)
-0.20
-0.15
-0.10
-0.05
0
0.05
0.10
0.15
0.20
-50 0-25 25 50 75 100
GAIN vs. TEMPERATURE
MAX4356 toc37
TEMPERATURE (°C)
NORMALIZED GAIN (dB)
AV = +2V/V
AV = +1V/V
1p 10n 1µ
100p10p 1n 100n 10µ100µ
MAX4356 toc38
10n
10µ
1µ
100n
100µ
1m
10m
100m
10
1
RESET DELAY vs. CRESET
RESET DELAY (s)
CRESET (F)
OSD SWITCHING TRANSIENT
(100IRE LEVEL SWITCH) (AV = +2V/V)
MAX4356 toc39
50ns/div
VOSDKEY0
5V/div
VOUT0
500mV/div
100IRE
0IRE
OSD SWITCHING 3.58MHz SIGNAL
(AV = +2V/V)
MAX4356 toc40
50ns/div
VOSDKEY0
5V/div
VOUT0
500mV/div
0
20
10
40
30
60
50
70
-50 0 25-25 50 75 100
SUPPLY CURRENT vs. TEMPERATURE
MAX4358 toc41
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
ICC
IEE
IDD
MAX4356
16x16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
______________________________________________________________________________________ 19
Typical Operating Characteristics—Dual Supplies ±3V
(VCC = +3V and VEE = -3V, VDD = +3V, AGND = DGND = 0, VIN_ = 0, RL= 150Ωto AGND, and TA = +25°C, unless otherwise
noted.)
3
-7 0.1 1 10 100 1000
LARGE-SIGNAL FREQUENCY
RESPONSE
-5
MAX4356 toc42
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
-3
-1
1
0
-2
-4
-6
2RL = 150Ω
AV = +1V/V
AV = +2V/V
3
-7 0.1 1 10 100 1000
MEDIUM-SIGNAL FREQUENCY
RESPONSE
-5
MAX4356 toc43
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
-3
-1
1
0
-2
-4
-6
2RL = 150Ω
AV = +1V/V
Av = +2V/V
3
-7 0.1 1 10 100 1000
SMALL-SIGNAL FREQUENCY
RESPONSE
-5
MAX4356 toc44
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
-3
-1
1
0
-2
-4
-6
2RL = 150Ω
AV = +1V/V
AV = +2V/V
3
-7 0.1 1 10 100 1000
LARGE-SIGNAL FREQUENCY
RESPONSE
-5
MAX4356 toc45
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
-3
-1
1
0
-2
-4
-6
2RL = 1kΩ
AV = +2V/V
AV = +1V/V
3
-7 0.1 1 10 100 1000
MEDIUM-SIGNAL FREQUENCY
RESPONSE
-5
MAX4356 toc46
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
-3
-1
1
0
-2
-4
-6
2RL = 1kΩ
AV = +1V/V
AV = +2V/V
3
-7 0.1 1 10 100 1000
SMALL-SIGNAL FREQUENCY
RESPONSE
-5
MAX4356 toc47
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
-3
-1
1
0
-2
-4
-6
2RL = 1kΩ
AV = +1V/V
AV = +2V/V
0.3
-0.7 0.1 1 10 100 1000
LARGE-SIGNAL GAIN FLATNESS
-0.5
MAX4356 toc48
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
-0.3
-0.1
0.1
0
-0.2
-0.4
-0.6
0.2 RL = 150Ω
AV = +1V/V
AV = +2V/V
0.3
-0.7 0.1 1 10 100 1000
LARGE-SIGNAL GAIN FLATNESS
-0.5
MAX4356 toc49
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
-0.3
-0.1
0.1
0
-0.2
-0.4
-0.6
0.2 RL = 1kΩ
AV = +1V/V
AV = +2V/V
3
-7 0.1 1 10 100 1000
LARGE-SIGNAL FREQUENCY RESPONSE
(AV = +1V/V)
-5
MAX4356 toc50
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
-3
-1
1
0
-2
-4
-6
2
CL = 15pF
CL = 45pF
CL = 30pF
MAX4356
16x16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
20 ______________________________________________________________________________________
Typical Operating Characteristics—Dual Supplies ±3V (continued)
(VCC = +3V and VEE = -3V, VDD = +3V, AGND = DGND = 0, VIN_ = 0, RL= 150Ωto AGND, and TA = +25°C, unless otherwise
noted.)
3
-7 0.1 1 10 100 1000
LARGE-SIGNAL FREQUENCY RESPONSE
(AV = +2V/V)
-5
MAX4356 toc51
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
-3
-1
1
0
-2
-4
-6
2
CL = 15pF
CL = 45pF
CL = 30pF
8
-8 0.1 1 10 100 1000
MEDIUM-SIGNAL FREQUENCY RESPONSE
(AV = +1V/V)
MAX4356 toc52
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
-2
2
4
0
-4
-6
6
CL = 30pF
CL = 45pF
CL = 15pF
6
-4 0.1 1 10 100 1000
MEDIUM-SIGNAL FREQUENCY RESPONSE
(AV = +2V/V)
-2
MAX4356 toc53
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
0
2
4
3
1
-1
-3
5CL = 45pF
CL = 30pF
CL = 15pF
-40
-90 1k 1M 10M 100M 1G
CROSSTALK VS. FREQUENCY
-80
MAX4356 toc54
FREQUENCY (Hz)
CROSSTALK (dB)
-70
-60
-50
-55
-65
-75
-85
-45 AV = +1V/V
-30
-80 0.1 1 10 100 1000
CROSSTALK VS. FREQUENCY
-70
MAX4356 toc55
FREQUENCY (MHz)
CROSSTALK (dB)
-60
-50
-40
-45
-55
-65
-75
-35 AV = + 2V/V
-10
-100 0.1 100101
DISTORTION VS. FREQUENCY
-70
-90
-30
-50
0
-60
-80
-20
-40
MAX4356 toc56
FREQUENCY (MHz)
DISTORTION (dBc)
AV = + 1V/V
2ND HARMONIC
3RD HARMONIC
-10
-100 0.1 100M10M1M
DISTORTION VS. FREQUENCY
-70
-90
-30
-50
0
-60
-80
-20
-40
MAX4356 toc57
FREQUENCY (Hz)
CROSSTALK (dBc)
AV = +2 V/V
2ND HARMONIC
3RD HARMONIC
0.1 101 100 1000
ENABLED OUTPUT IMPEDANCE
VS. FREQUENCY
MAX4356 toc58
FREQUENCY (MHz)
OUTPUT IMPEDANCE (Ω)
1000
0.1
1
10
100
1M
10.1 10 1001 1000
DISABLED OUTPUT IMPEDANCE
VS. FREQUENCY
MAX4356 toc59
FREQUENCY (MHz)
OUTPUT IMPEDANCE (Ω)
10
100
1k
10k
100k
MAX4356
16x16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
______________________________________________________________________________________ 21
Typical Operating Characteristics—Dual Supplies ±3V (continued)
(VCC = +3V and VEE = -3V, VDD = +3V, AGND = DGND = 0, VIN_ = 0, RL= 150Ωto AGND, and TA = +25°C, unless otherwise
noted.)
-40
-50
-60
-70
-80
-90
-100
-110
-120100k 10M 100M1M 1G
OFF ISOLATION VS. FREQUENCY
MAX4356 toc60
FREQUENCY (Hz)
OFF ISOLATION (dB)
-50
-75 10k 100k 10M 100M
POWER-SUPPLY REJECTION RATIO
VS. FREQUENCY
-70
-65
-55
MAX4356 toc61
FREQUENCY (Hz)
PSRR (dB)
1M
1000
10 10 10k 100k 1M100 1k 10M
INPUT VOLTAGE NOISE
vs. FREQUENCY
100
MAX4356 toc62
FREQUENCY (Hz)
VOLTAGE NOISE (nV/ Hz)
LARGE-SIGNAL PULSE RESPONSE
(AV = +1V/V)
MAX4356 toc63
OUTPUT
0.5V/div
INPUT
1V/div
25ns/div
LARGE-SIGNAL PULSE RESPONSE
(AV = +2V/V)
MAX4356 toc64
OUTPUT
0.5V/div
INPUT
0.5V/div
25ns/div
MEDIUM-SIGNAL PULSE RESPONSE
(AV = +1V/V)
MAX4356 toc65
OUTPUT
50mV/div
INPUT
100mV/div
25ns/div
MEDIUM-SIGNAL PULSE RESPONSE
(AV = +2V/V)
MAX4356 toc66
OUTPUT
50mV/div
INPUT
50mV/div
25ns/div
SWITCHING TIME
(AV = +1V/V)
MAX4356 toc67
VOUT
500mV/div
VUPDATE
3V/div
20ns/div
SWITCHING TIME
(AV = +2V/V)
MAX4356 toc68
VOUT
1V/div
VUPDATE
3V/div
20ns/div
MAX4356
16x16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
22 ______________________________________________________________________________________
Typical Operating Characteristics—Dual Supplies ±3V (continued)
(VCC = +3V and VEE = -3V, VDD = +3V, AGND = DGND = 0, VIN_ = 0, RL= 150Ωto AGND, and TA = +25°C, unless otherwise
noted.)
SWITCHING TRANSIENT (GLITCH)
MAX4356 toc69
(AV = +1V/V)
VOUT
25mV/div
VUPDATE
3V/div
20ns/div
SWITCHING TRANSIENT (GLITCH)
MAX4356 toc70
(AV = +2V/V)
VOUT
25mV/div
VUPDATE
3V/div
20ns/div
50
0
150
100
250
200
300
-15 -11 -9 -7-13 -5 -3 -1 1 3 5
OFFSET VOLTAGE DISTRIBUTION
MAX4356 toc71
OFFSET VOLTAGE (mV)
0.05
0
-0.05
0.15
0.10
0.20
0.05
0
-0.05
0.15
0.10
0.20
0.25
10 30 40 5020 60 70 80 90 100
DIFFERENTIAL GAIN AND PHASE
(RL = 150Ω)
MAX4356 toc72
IRE
DIFFERENTIAL
GAIN (%)
DIFFERENTIAL
PHASE (°)
0.02
0
-0.02
0.06
0.04
0.08
10 30 40 5020 60 70 80 90 100
DIFFERENTIAL GAIN AND PHASE
(RL = 1kΩ)
MAX4356 toc73
IRE
DIFFERENTIAL
GAIN (%)
DIFFERENTIAL
PHASE (°)
0.015
0.020
0
0.010
0.005
0.010
LARGE-SIGNAL PULSE RESPONSE
WITH CAPACITIVE LOAD
(CL = 30pF, AV = +1V/V)
MAX4356 toc74
OUTPUT
500mV/div
INPUT
1V/div
25ns/div
LARGE-SIGNAL PULSE RESPONSE
WITH CAPACITIVE LOAD
(CL = 30pF, AV = + 2V/V)
MAX4356 toc75
OUTPUT
0.5V/div
INPUT
0.5V/div
25ns/div
MEDIUM-SIGNAL PULSE RESPONSE
WITH CAPACITIVE LOAD
(CL = 30pF, AV = + 1V/V)
MAX4356 toc76
OUTPUT
50mV/div
100mV/div
25ns/div
MEDIUM-SIGNAL PULSE RESPONSE
WITH CAPACITIVE LOAD
(CL = 30pF, AV = + 2V/V)
MAX4356 toc77
OUTPUT
50mV/div
INPUT
50mV/div
25ns/div
MAX4356
16x16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
______________________________________________________________________________________ 23
Typical Operating Characteristics—Dual Supplies ±3V (continued)
(VCC = +3V and VEE = -3V, VDD = +3V, AGND = DGND = 0, VIN_ = 0, RL= 150Ωto AGND, and TA = +25°C, unless otherwise
noted.)
-50 0-25 255075100
GAIN VS. TEMPERATURE
MAX4356 toc78
TEMPERATURE (°C)
NORMALIZED GAIN (dB)
-0.20
-0.15
-0.05
-0.10
0.10
0.15
0.05
0.20
0
AV = +2V/V
AV = +1V/V
1p 10n 1µ
100p10p 1n 100n 10µ100µ
MAX4356 toc79
10n
10µ
1µ
100n
100µ
1m
10m
100m
10
1
RESET DELAY vs. CRESET
RESET DELAY (s)
CRESET (F)
OSD SWITCHING TRANSIENT
(100IRE LEVEL SWITCH)
MAX4356 toc80
VOUT0
500mV/div
VOSDKEY0
3V/div
50ns/div
100IRE
0IRE
AV = +2V/V
OSD SWITCHING 3.58MHz SIGNAL
MAX4356 toc81
VOUT0
500mV/div
VOSDKEY0
3V/div
50ns/div
AV = + 2V/V
3
-7100k 1M 10M 100M 1G
LARGE-SIGNAL FREQUENCY RESPONSE
-5
MAX4356 toc85
FREQUENCY (Hz)
NORMALIZED GAIN (dB)
-3
-1
1
0
-2
-4
-6
2RL = 1kΩ
MAX4356
16x16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
24 ______________________________________________________________________________________
Typical Operating Characteristics—Single Supply +5V
(VCC = +5V and VEE = 0, VDD = +5V, AGND = DGND = 0, VIN_ = 0, RL= 150Ωto AGND, AV= +1V/V, and TA = +25°C, unless oth-
erwise noted.)
3
-7 0.1 1 10 100 1000
LARGE-SIGNAL FREQUENCY RESPONSE
-5
MAX4356 toc82
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
-3
-1
1
0
-2
-4
-6
2RL = 150Ω
3
-7 0.1 1 10 100 1000
MEDIUM-SIGNAL FREQUENCY RESPONSE
-5
MAX4356 toc83
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
-3
-1
1
0
-2
-4
-6
2RL = 150Ω
3
-7 0.1 1 10 100 1000
SMALL-SIGNAL FREQUENCY RESPONSE
-5
MAX4356 toc84
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
-3
-1
1
0
-2
-4
-6
2RL = 150Ω
3
-7100k 1M 10M 100M 1G
MEDIUM-SIGNAL FREQUENCY RESPONSE
-5
MAX4356 toc86
FREQUENCY (Hz)
NORMALIZED GAIN (dB)
-3
-1
1
0
-2
-4
-6
2RL = 1kΩ
3
-7100k 1M 10M 100M 1G
SMALL-SIGNAL FREQUENCY RESPONSE
-5
MAX4356 toc87
FREQUENCY (Hz)
NORMALIZED GAIN (dB)
-3
-1
1
0
-2
-4
-6
2RL = 1kΩ
0.3
-0.7 0.1 1 10 100 1000
LARGE-SIGNAL GAIN FLATNESS
-0.5
MAX4356 toc88
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
-0.3
-0.1
0.1
0
-0.2
-0.4
-0.6
0.2 RL = 150Ω
0.3
-0.7 0.1 1 10 100 1000
LARGE-SIGNAL GAIN FLATNESS
-0.5
MAX4356 toc89
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
-0.3
-0.1
0.1
0
-0.2
-0.4
-0.6
0.2 RL = 1kΩ
3
-7 0.1 1 10 100 1000
LARGE-SIGNAL FREQUENCY RESPONSE
-5
MAX4356 toc90
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
-3
-1
1
0
-2
-4
-6
2
CL = 15pF
CL = 45pF
CL = 30pF
MAX4356
16x16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
______________________________________________________________________________________ 25
Typical Operating Characteristics—Single Supply +5V (continued)
(VCC = +5V and VEE = 0, VDD = +5V, AGND = DGND = 0, VIN_ = 0, RL= 150Ωto AGND, AV= +1V/V, and TA = +25°C, unless oth-
erwise noted.)
7
-7100k 1M 10M 100M 1G
MEDIUM-SIGNAL FREQUENCY RESPONSE
MAX4356 toc91
FREQUENCY (Hz)
NORMALIZED GAIN (dB)
-1
1
3
-3
-5
5
CL = 15pF
CL = 45pF
CL = 30pF
-50
-100100k 1M 10M 100M 1G
CROSSTALK vs. FREQUENCY
-90
MAX4356 toc92
FREQUENCY (MHz)
CROSSTALK (dB)
-80
-70
-60
-65
-75
-85
-95
-55
0
-100 0.1 1 10 100
DISTORTION vs. FREQUENCY
-80
MAX4356 toc93
FREQUENCY (MHz)
DISTORTION (Ω)
-60
-40
-20
-30
-50
-70
-90
-10
2ND HARMONIC
3RD HARMONIC
0.1 101 100 1000
ENABLED-OUTPUT IMPEDANCE
vs. FREQUENCY
MAX4356 toc94
FREQUENCY (MHz)
OUTPUT IMPEDANCE (Ω)
1k
0.1
1
10
100
1M
1100k 10M 100M1M 1G
MAX4356 toc95
FREQUENCY (Hz)
OUTPUT IMPEDANCE (Ω)
10
100
1k
10k
100k
DISABLED-OUTPUT IMPEDANCE
vs. FREQUENCY
-40
-50
-60
-70
-80
-90
-100
-110
-120100k 10M 100M1M 1G
MAX4356 toc96
FREQUENCY (Hz)
OFF ISOLATION (dB)
OFF ISOLATION vs. FREQUENCY
10k 1M100k 10M 100M
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX4356 toc97
FREQUENCY (Hz)
PSRR (dB)
-75
-70
-60
-65
-55
-50
1000
110 10k 100k 1M100 1k 10M
INPUT VOLTAGE NOISE vs. FREQUENCY
100
MAX4356 toc98
FREQUENCY (Hz)
VOLTAGE NOISE (nV/√ Hz)
LARGE-SIGNAL PULSE RESPONSE
MAX4356 toc99
25ns/div
INPUT
1V/div
OUTPUT
0.5V/div
MAX4356
16x16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
26 ______________________________________________________________________________________
Typical Operating Characteristics—Single Supply +5V (continued)
(VCC = +5V and VEE = 0, VDD = +5V, AGND = DGND = 0, VIN_ = 0, RL= 150Ωto AGND, AV= +1V/V, and TA = +25°C, unless oth-
erwise noted.)
MEDIUM-SIGNAL PULSE RESPONSE
MAX4356 toc100
25ns/div
INPUT
100mV/div
OUTPUT
50mV/div
SWITCHING TIME
MAX4356 toc101
20ns/div
VUPDATE
5V/div
VOUT
500mV/div
SWITCHING TRANSIENT (GLITCH)
MAX4356 toc102
20ns/div
VUPDATE
5V/div
VOUT
25mV/div
0
50
150
100
200
250
-20 -16 -14 -12-18 -10 -8 -6 -4 -2 0
OFFSET VOLTAGE HISTOGRAM
MAX4356 toc103
OFFSET VOLTAGE (mV)
-0.1
0102030405060708090100
0102030405060708090100
DIFFERENTIAL GAIN AND PHASE
(RL = 150Ω)
0.0
0.20
0.10
0.00
-0.10
0.1
0.2
0.30
0.3
IRE
DIFF PHASE (°)DIFF GAIN (%)
MAX4356 toc104
-0.02
0102030405060708090100
0102030405060708090100
DIFFERENTIAL GAIN AND PHASE
(RL = 1kΩ)
0.00
0.10
0.00
0.10
-0.20
0.02
0.04
0.20
0.06
IRE
DIFF PHASE (°) DIFF GAIN (%)
MAX4356 toc105
MAX4356
16x16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
______________________________________________________________________________________ 27
Typical Operating Characteristics—Single Supply +5V (continued)
(VCC = +5V and VEE = 0, VDD = +5V, AGND = DGND = 0, VIN_ = 0, RL= 150Ωto AGND, AV= +1V/V, and TA = +25°C, unless oth-
erwise noted.)
LARGE-SIGNAL PULSE RESPONSE WITH
CAPACITIVE LOAD (CL = 30pF)
MAX4356 toc106
25ns/div
INPUT
1V/div
OUTPUT
0.5V/div
MEDIUM-SIGNAL PULSE RESPONSE WITH
CAPACITIVE LOAD (CL = 30pF)
MAX4356 toc107
25ns/div
INPUT
100mV/div
OUTPUT
50mV/div
-0.20
-0.15
-0.10
-0.05
0
0.05
0.10
0.15
0.20
-50 0-25 255075100
GAIN vs. TEMPERATURE
MAX4356 toc108
TEMPERATURE (°C)
NORMALIZED GAIN (dB)
1p 10n 1µ
100p10p 1n 100n 10µ100µ
MAX4356 toc109
10n
10µ
1µ
100n
100µ
1m
10m
100m
10
1
RESET DELAY vs. CRESET
RESET DELAY (s)
CRESET (F)
OSD SWITCHING TRANSIENT
(100IRE LEVEL SWITCH)
MAX4356 toc110
50ns/div
VOSDKEY0
5V/div
VOUT0
250mV/div
100IRE
0IRE
50ns/div
OSD SWITCHING 3.58MHz SIGNAL
VOSDKEY0
5V/div
VOUT0
250mV/div
MAX4356 toc111
MAX4356
16x16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
28 ______________________________________________________________________________________
Pin Description
PIN NAME FUNCTION
1–4, 30–38, 103 N.C. No Connection. Not internally connected. Connect to AGND.
5, 7, 9, 11, 13,
15, 17, 19, 21, 23,
25, 27, 121, 123,
125, 127
IN0–IN15
Buffered Analog Inputs
6, 8, 10, 12, 14,
16, 18, 20, 65, 66,
100, 101, 102,
120, 122, 124,
126
AGND Analog Ground
22, 24, 26, 28 A3–A0 Address Programming Inputs. Connect to DGND or VDD to select the address for individual
output address mode. See Table 3.
29, 67, 71, 75, 79,
83, 87, 91, 95, 99
VCC Positive Analog Supply. Bypass each pin with a 0.1µF capacitor to AGND. Connect a single
10µF capacitor from one VCC pin to AGND.
39 DOUT Serial Data Output. In complete matrix mode, data is clocked through the 96-bit Matrix Control
Shift register. In individual output address mode, data at DIN passes directly to DOUT.
40 DGND Digital Ground
41 AOUT Address Recognition Output. AOUT drives low after successful chip address recognition.
42 SCLK Serial Clock Input
43 CE Clock Enable Input. Drive low to enable the serial data interface.
44 MODE Serial Interface Mode Select Input. Drive high for complete matrix mode (mode 1), or drive low
for individual output address mode (mode 0).
45 RESET Asynchronous Reset Input/Output. Drive RESET low to initiate hardware reset. All matrix
settings are set to power-up defaults and all analog outputs are disabled. Additional power-on
reset delay may be set by connecting a small capacitor from RESET to DGND.
46
UPDATE
Update Input. Drive UPDATE low to transfer data from Mode registers to the matrix switch.
47 DIN Serial Data Input. Data is clocked in on the falling edge of SCLK.
48 VDD Digital Logic Supply. Bypass VDD with a 0.1µF capacitor DGND.
49–64 OSDKEY0–
OSDKEY15
Digital Control Input. Control for the fast 2:1 OSD insertion multiplexer routing signal to output
buffers. A logic high routes the programmed IN_ analog input signal to the output buffer. A
logic low routes the dedicated OSDFILL_ input to the corresponding output buffer.
68, 70, 72, 74, 76,
78, 80, 82, 84, 86,
88, 90, 92, 94, 96,
98
OUT0–
OUT15
Buffered Analog Outputs. Gain is individually programmable for AV = +1V/V or AV = +2V/V
through the serial interface. Outputs may be individually disabled (high impedance). On
power-up or assertion of RESET, all outputs are disabled.
69, 73, 77, 81, 85,
89, 93, 97, 128 VEE Negative Analog Supply. Bypass each pin with a 0.1µF capacitor to AGND. Connect a single
10µF capacitor from one VEE pin to AGND.
104–119
OSDFILL0–
OSDFILL15
Dedicated OSD Analog Signal Buffered Inputs. For each output buffer amplifier OSDFILL, the
input signal is routed to output buffer amplifier OUT when the corresponding OSDKEY is low.
MAX4356
16x16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
______________________________________________________________________________________ 29
Detailed Description
The MAX4356 is a highly integrated 16 ✕16 nonblock-
ing video crosspoint switch matrix. All inputs and out-
puts are buffered, with all outputs able to drive
standard 75Ωreverse-terminated video loads.
A 3-wire interface programs the switch matrix and ini-
tializes with a single update signal. The unique serial
interface operates in one of two modes: Complete
Matrix Mode (Mode 1) or Individual Output Address
Mode (Mode 0).
In the Functional Diagram, the signal path of the
MAX4356 is from the inputs (IN0–IN15), through the
switching matrix, buffered by the output amplifiers, and
presented at the output terminals (OUT0–OUT15). The
other functional blocks are the serial interface and con-
trol logic. Each of the functional blocks is described in
detail below.
Analog Outputs
The MAX4356 outputs are high-speed voltage feed-
back amplifiers capable of driving 150Ω(75Ωback-ter-
minated) loads. The gain, AV= +1V/V or +2V/V, is
selectable through programming bit 4 of the serial con-
trol word. Amplifier compensation is automatically opti-
mized to maximize the bandwidth for each gain selec-
tion. Each output can be individually enabled and dis-
abled through bit 5 of the serial control word. When
disabled, the output is high impedance, presenting typ-
ically a 4kΩload, and 3pF output capacitance, allowing
multiple outputs to be connected together in building
large arrays. On power-up (or asynchronous RESET),
all outputs are initialized in the disabled state to avoid
output conflicts in large array configurations. The pro-
gramming and operation of the MAX4356 is output
referred. Outputs are configured individually to connect
to any one of the 16 analog inputs, programmed to the
desired gain (AV= +1V/V or +2V/V), or disabled in a
high-impedance state.
Analog Inputs
The MAX4356 offers 16 analog input channels. Each
input is buffered before the crosspoint switch matrix,
allowing one input to cross-connect to up to 16 outputs.
The input buffers are voltage feedback amplifiers with
high input impedance and low-input bias current. This
allows the use of very simple input clamp circuits.
MAX4356
16 x 16
SWITCH MATRIX
POWER-ON
RESET
SERIAL
INTERFACE
THERMAL
SHUTDOWN
DECODE LOGIC
DISABLE ALL OUTPUTS
LATCHES
256 16 16
MATRIX REGISTER
96 BITS
UPDATE REGISTER
16 BITS
2:1
OSD
MUX
ENABLE/DISABLE
AV*
AV*
AV*
AV*
*AV = +1V/V OR +2V/V
A0-A3 MODE
IN0
IN1
IN2
IN15
DIN
SCLK
UPDATE
CE
RESET
OSDKEY0 OSDKEY15
OSDKEY1
OSDFILL0 OSDFILL15
OUT0
OUT1
OUT2
OUT15
VCC
VEE
DGND
VDD
DOUT
AOUT
OSDFILL1
AGND
Functional Diagram
MAX4356
16x16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
30 ______________________________________________________________________________________
OSDFILL and OSDKEY Inputs
Intended for on-screen display insertion, the 16 OSD-
FILL inputs are buffered analog signal inputs that are
routed exclusively to a dedicated output buffer through
a fast 2:1 Mux. The signal presented to the output
buffer is selected from the programmed analog input
signal (IN_) and the dedicated OSDFILL input signal.
Each OSD Insertion Mux is controlled through the cor-
responding OSDKEY digital input to provide fast pixel
switching.
Switch Matrix
The MAX4356 has 256 individual T-switches making a
16 x 16 switch matrix . The switching matrix is 100%
nonblocking, which means that any input may be rout-
ed to any output. The switch matrix programming is
output-referred. Each output may be connected to any
one of the 16 analog inputs. Any one input can be rout-
ed to all 16 outputs with no signal degradation.
Digital Interface
The digital interface consists of the following pins: DIN,
DOUT, SCLK, AOUT, UPDATE, CE, A3–A0, MODE, and
RESET. DIN is the serial data input; DOUT is the serial
data output. SCLK is the serial data clock that clocks
data into the Data Input registers (Figure 2). Data at
DIN is loaded at each falling edge of SCLK. DOUT is
the data shifted out of the 96-bit Complete Matrix Mode
(Mode = 1). DIN passes directly to DOUT when in
Individual Output Address Mode (Mode = 0).
The falling edge of UPDATE latches the data and pro-
grams the matrix. When using individual output
address mode, the address recognition output AOUT
drives low when control word bits D13 to D10 match
the address programming inputs (A3–A0) and UPDATE
is low. Table 1 is the operation truth table.
Programming the Matrix
The MAX4356 offers two programming modes: individ-
ual output address mode and complete matrix mode.
CE UPDATE
SCLK DIN DOUT MODE AOUT
RESET OPERATION/COMMENTS
1 X X X X X X 1 No change in logic.
01↓DiDi-96 11 1
Data at DIN is clocked on the negative
edge of the SCLK into the 96-bit
Complete Matrix Mode register. DOUT
supplies original data in 96 SCLK
pulses later.
00XXX111
Data in the serial 96-bit Complete
Matrix Mode register is transferred
into parallel latches that control the
switching matrix.
01↓DiDi01 1
Data at DIN is routed to the Individual
Output Address Mode shift register.
DIN is also connected directly to
DOUT so that all devices on the serial
bus may be addressed in parallel.
00XD
iDi00 1
The 4-bit chip address A3 to A0 is
compared to D13 to D10. If equal, the
remaining 10 bits in the Individual
Output Address Mode register are
decoded, allowing reprogramming for
a single output. AOUT signals a
successful individual matrix update.
X X XXXXX 0
Asynchronous reset. All outputs are
disabled. Other logic remains
unchanged.
Table 1. Operation Truth Table
MAX4356
16x16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
______________________________________________________________________________________ 31
These two distinct programming modes are selected
by toggling a single MODE pin high or low. Both modes
operate with the same physical board layout. This flexi-
bility allows initial programming of the IC by daisy-
chaining and sending one long data word while still
being able to address immediately and update individ-
ual outputs in the matrix.
Individual Output Address Mode (MODE = 0)
Drive MODE to logic low to select mode 0. Individual
outputs are programmed through the serial interface
with a single 16-bit control word. The control word con-
sists of two don’t care MSBs, the chip address bits, out-
put address bits, an output enable/disable bit, an
output gain-set bit, and input address bits (Tables 2
through 6, and Figure 2).
In mode 0, data at DIN passes directly to DOUT
through the data routing gate (Figure 3). In this configu-
ration, the 16-bit control word is simultaneously sent to
all chips in an array of up to 16 addresses.
Complete Matrix Mode (MODE = 1)
Drive MODE to logic high to select mode 1. A single
96-bit control word consisting of 16 six-bit control
words programs all outputs. The 96-bit control word’s
first 6-bit control word (MSBs) programs output 15, and
the last 6-bit control word (LSBs) programs output 0
(Table 7 and Figures 4 and 5). Data clocked into the
96-bit Complete Matrix Mode register is latched on the
falling edge of UPDATE, and the outputs are immedi-
ately updated.
Initialization String
The Complete Matrix Mode (Mode = 1) is convenient to
use to program the matrix at power-up. In a large
matrix consisting of many MAX4356 devices, all the
devices can be programmed by sending a single-bit
BIT NAME FUNCTION
0
(LSB)
Input Address 0 LSB of input channel
select address
1 Input Address 1
2 Input Address 2
3 Input Address 3 MSB of input channel
select address
4 Gain Set Gain Select for output
buffer, 0 = gain of +1V/V,
1 = gain of +2V/V
5 Output Enable Enable bit for output, 0 =
disable, 1 = enable
6
Output Address B0
LSB of output buffer
address
7
Output Address B1
8
Output Address B2
9
Output Address B3
MSB of output buffer
address
10 IC Address A0 LSB of selected chip
address
11 IC Address A1
12 IC Address A2
13 IC Address A3 MSB of selected chip
address
14 X Don’t care
15
(MSB)
X Don’t care
Table 2. 16-Bit Serial Control Word Bit
Assignments (Mode 0: Individual Output
Address Mode)
IC ADDRESS BIT ADDRESS
A3
(MSB)
A2 A1
A0
(LSB)
CHIP
ADDRESS
(HEX)
CHIP
ADDRESS
(DECIMAL)
0
00
00h 0
0
00
11h 1
0
01
02h 2
0
01
13h 3
0
10
04h 4
0
10
15h 5
0
11
06h 6
0
11
17h 7
1
00
08h 8
1
00
19h 9
1
01
0Ah 10
1
01
1Bh 11
1
10
0Ch 12
1
10
1Dh 13
1
11
0Eh 14
1
11
1Fh 15
Table 3. Chip Address Programming for
16-Bit Control Word (Mode 0: Individual
Output Address Mode)
MAX4356
16x16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
32 ______________________________________________________________________________________
IC ADDRESS = 5 OUTPUT ADDRESS = 3 OUTPUT (i) ENABLED, AV = +1V/V,
CONNECTED TO INPUT 12
EXAMPLE OF 16-BIT
SERIAL CONTROL WORD FOR OUTPUT
CONTROL IN INDIVIDUAL OUTPUT ADDRESS MODE
16-BIT INDIVIDUAL OUTPUT ADDRESS MODE:
FIRST 2 BITS ARE DON'T CARE BITS, LAST 14 BITS CLOCKED INTO DIN WHEN MODE = 0 CREATE ADDRESS WORD;
IC ADDRESS A3–A0 IS COMPARED TO DIN13–DIN10 WHEN UPDATE IS LOW; IF
EQUAL, ADDRESSED OUTPUT IS UPDATED.
DON'T CARE X
DON'T CARE X
OUTPUT ADDRESS B3
OUTPUT ADDRESS B2
OUTPUT ADDRESS B1
OUTPUT ADDRESS B0
OUTPUT ENABLED
GAIN SET = +1V/V
INPUT ADDRESS 3 (MSB) = 1
INPUT ADDRESS 0 (LSB) = 0
INPUT ADDRESS 2 = 1
INPUT ADDRESS 1 = 0
IC ADDRESS A3
IC ADDRESS A2
IC ADDRESS A1
IC ADDRESS A0
UPDATE
MODE
SCLK
DIN
tSuMd tHdMd
Figure 2. Mode 0: Individual Output Address Mode Timing and Programming Example
PIN ADDRESS
A3 A2 A1 A0
C H IP
A D DR ESS
( H EX)
C H IP
A D DR ESS
( D EC IM AL )
D GN D
D GND D GND D GND
0h 0
D GN D
D GND D GN D
V
D D 1h 1
D GN D
D GND V
D D D GND
2h 2
D GN D
D GND V
D D
V
D D 3h 3
D GN D
V
D D D GND D GN D
4h 4
D GN D
V
D D D GND
V
D D 5h 5
D GN D
V
D D V
D D D GND
6h 6
D GN D
V
D D V
D D
V
D D 7h 7
V
D D
D GND D GND D GND
8h 8
V
D D
D GND D GN D
V
D D 9h 9
V
D D
D GND V
D D D GND
Ah 10
V
D D
D GND V
D D
V
D D Bh 11
V
D D
V
D D D GND D GN D
Ch 12
V
D D
V
D D D GND
V
D D Dh 13
V
D D
V
D D V
D D D GND
Eh 14
V
D D
V
D D V
D D
V
D D Fh 15
Table 4. Chip Address A3–A0 Pin
Programming
OUTPUT ADDRESS BIT
B3
(MSB) B2 B1 B0
(LSB)
SELECTED
OUTPUT
0000 0
0001 1
0010 2
0011 3
0100 4
0101 5
0110 6
0111 7
1000 8
1001 9
1010 10
1011 11
1100 12
1101 13
1110 14
1111 15
Table 5. Output Selection Programming
MAX4356
16x16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
______________________________________________________________________________________ 33
SCLK A0–A3
CHIP ADDRESS
4
4
AS
MODE
MODE
MODE
AOUT
DOUT
B
DATA
ROUTING
GATE
16-BIT INDIVIDUAL OUTPUT ADDRESS
MODE REGISTER
96-BIT COMPLETE MATRIX MODE REGISTER
96-BIT PARALLEL LATCH
SWITCH DECODE
SWITCH MATRIX OUTPUT ENABLE
OUTPUT ADDRESS DECODE
MODE CE
SCLK
MODE
DIN
CE 10
10
1
7
7
96
96
96
UPDATE
EN
256 16
Figure 3. Serial Interface Block Diagram
INPUT ADDRESS BIT
B3
(MSB)
B2 B1 B0
(LSB)
SELECTED
INPUT
0000 0
0001 1
0010 2
0011 3
0100 4
0101 5
0110 6
0111 7
1000 8
1001 9
1010 10
1011 11
1100 12
1101 13
1110 14
1111 15
Table 6. Input Selection Programming
BIT NAME FUNCTION
5 (MSB)
Output
Enable Enable bit for output,
0 = disable, 1 = enable
4Gain
Set Gain Select for output buffer, 0 =
gain of +1V/V, 1 = gain of +2V/V.
3Input
Address 3
MSB of input channel select
address
2Input
Address 2
1Input
Address 1
0 (LSB)
Input
Address 0
LSB of input channel select
address
Table 7. 6-Bit Serial Control Word Bit
Assignments (Mode 1: Complete Matrix
Mode)
MAX4356
16x16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
34 ______________________________________________________________________________________
0
0
OUT0OUT1OUT2
UPDATE 1
MODE 1
MOST-SIGNIFICANT OUTPUT BUFFER CONTROL BITS ARE SHIFTED IN FIRST, I.E., OUT15, THEN OUT14, ETC.
LAST 6 BITS SHIFTED IN PRIOR TO UPDATE NEGATIVE EDGE PROGRAM OUT0.
DIN
6-BIT CONTROL WORD
Figure 5. Mode 1: Complete Matrix Mode Programming
SCLK
tMnLCk
tSuDi tHdDi
tPdDo
tSuHUd tMnLUd
NEXT CONTROL WORD
tMnHCk
UPDATE
DOUT
EXAMPLE OF 6-BIT
SERIAL CONTROL
WORD FOR OUTPUT
CONTROL
16 x 16 CROSSPOINT = 6-BIT
CONTROL WORD
SCLK
DIN
OUTPUT (i) ENABLED, AV = +1V/V,
CONNECTED TO INPUT 14
OUTPUT ENABLED
INPUT ADDRESS 3 (MSB) = 1
INPUT ADDRESS 2 = 1
INPUT ADDRESS 1 = 1
INPUT ADDRESS 0 (LSB) = 0
GAIN SET = +1V/V
DIN
Figure 4. 6-Bit Control Word and Programming Example (Mode 1: Complete Matrix Mode Programming)
MAX4356
16x16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
______________________________________________________________________________________ 35
stream equal to n x 96 bits, where n is the number of
MAX4356 devices on the bus. The first 96-bit data word
programs the last MAX4356 in line (see Matrix
Programming under Applications Information).
On-Screen-Display Fast Mux
The MAX4356 features an asynchronous dedicated 2:1
Mux for each output buffer amplifier. Fast 40ns switch-
ing times enable pixel switching for on-screen-display
(OSD) information such as text or other picture-in-pic-
ture signals (Figure 1). OSDFILL_ inputs are buffered
analog inputs connected to each dedicated OSD Mux.
Switching between the programmed IN_ input from the
crosspoint switch matrix and the OSDFILL_ is accom-
plished by driving the dedicated OSDKEY_ digital
input. A logic low on OSDKEYi routes the analog signal
at OSDFILLito the OUTioutput buffer. OSDKEY_ con-
trol does not affect the crosspoint switch matrix pro-
gramming or the output buffer enable/disable or
gain-set programming.
RESET
The MAX4356 features an asynchronous bidirectional
RESET with an internal 20kΩpullup resistor to VDD.
When RESET is pulled low, either by internal circuitry,
or driven externally, the analog output buffers are
latched into a high-impedance state. After RESET is
released, the output buffers remain disabled. The out-
puts may be enabled by sending a new 96-bit data
word or a 16-bit individual output address word. A reset
is initiated from any of three sources. RESET can be
driven low by external circuitry to initiate a reset, or
RESET can be pulled low by internal circuitry during
power-up (power-on reset) or thermal shutdown.
Since driving RESET low only clears the output buffer
enable bit in the matrix control latches, RESET can be
used to disable all outputs simultaneously. If no new
data has been loaded into the 96-bit complete matrix
mode register, a single UPDATE restores the previous
matrix control settings. Power-On-Reset
The power-on reset ensures all output buffers are in a
disabled state when power is initially applied. A VDD
voltage comparator generates the power-on-reset.
When the voltage at VDD is less than 2.5V, the power-
on-reset comparator pulls RESET low through internal
circuitry. As the digital supply voltage ramps up cross-
ing 2.5V, the MAX4356 holds RESET low for 40ns (typ).
Connecting a small capacitor from RESET to DGND
extends the power-on-reset delay. See Power-on Reset
vs. RESET Capacitance in the Typical Operating
Characteristics.
Thermal Shutdown
The MAX4356 features thermal shutdown protection
with temperature hysteresis. When the die temperature
exceeds +150°C, the MAX4356 pulls RESET low, dis-
abling the output buffers. When the die cools by 20°C,
the RESET pulldown is deasserted, and output buffers
remain disabled until the device is programmed again.
Applications Information
Building Large Video Switching Systems
The MAX4356 can be easily used to create larger
switching matrices. The number of ICs required to
implement the matrix is a function of the number of
input channels, the number of outputs required, and
whether the array needs to be nonblocking or not. The
most straightforward technique for implementing non-
blocking matrices is to arrange the building blocks in a
grid. The inputs connect to each vertical bank of
devices in parallel with the other banks. The outputs of
each building block in a vertical column connect
together in a wired-OR configuration. Figure 6 shows a
128-input, 32-output, nonblocking array using the
MAX4356 16 x 16 crosspoint devices.
The wired-OR connection of the outputs shown in the
diagram is possible because the outputs of the IC
devices can be placed in a disabled or high-imped-
ance output state. This disable state of the output
buffers is designed for a maximum impedance vs. fre-
quency while maintaining a low output capacitance.
These characteristics minimize the adverse loading
effects from the disabled outputs. Larger arrays are
constructed by extending this connection technique to
more devices.
Driving a Capacitive Load
Figure 6 shows an implementation requiring many out-
puts to be wired together. This creates a situation
where each output buffer sees not only the normal load
impedance, but also the disabled impedance of all the
other outputs. This impedance has a resistive and a
capacitive component. The resistive components
reduce the total effective load for the driving output.
Total capacitance is the sum of the capacitance of all
the disabled outputs and is a function of the size of the
matrix. Also, as the size of the matrix increases, the
length of the PC board traces increases, adding more
capacitance. The output buffers have been designed to
drive more than 30pF of capacitance while still main-
taining a good AC response. Depending on the size of
the array, the capacitance seen by the output can
exceed this amount. There are several ways to improve
the situation. The first is to use more building-block
MAX4356
16x16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
36 ______________________________________________________________________________________
crosspoint devices to reduce the number of outputs
that need to be wired together (see Figure 7).
In Figure 7, the additional devices are placed in a sec-
ond bank to multiplex the signals. This reduces the
number of wired-OR connections. Another solution is to
put a small resistor in series with the output before the
capacitive load to limit excessive ringing and oscilla-
tions. Figure 8 shows the graph of the Optimal Isolation
Resistor vs. Capacitive Load. A lowpass filter is created
from the series resistor and parasitic capacitance to
ground. A single R-C do not affect the performance at
video frequencies, but in a very large system there may
be many R-Cs cascaded in series. The cumulative
effect is a slight rolling off of the high frequencies caus-
ing a "softening" of the picture. There are two solutions
to achieve higher performance. One way is to design
the PC board traces associated with the outputs such
that they exhibit some inductance. By routing the traces
in a repeating "S" configuration, the traces that are
nearest each other will exhibit a mutual inductance
increasing the total inductance. This series inductance
causes the amplitude response to increase or peak at
higher frequencies, offsetting the rolloff from the para-
sitic capacitance. Another solution is to add a small-
value inductor to the output.
On-Screen Display Insertion
The MAX4356 facilitates the insertion of on-screen
graphics and characters by using the built-in fast 2:1
multiplexer associated with each of the 16 outputs
(Functional Diagram). This mux switches in 40ns, much
less than the width of a single pixel. Access to this fast
mux is through 16 dedicated OSDFILL analog inputs
and 16 dedicated OSDKEY input controls. OSD timing
is externally controlled and applied to the OSDKEY
inputs (Figure 1). Pulling OSDKEYilow switches the
signal on the OSDFILLiinput to the OUTioutput. When
the OSDKEY signal is logic high, the signal at IN_ is
switched to the output. This switching action is repeat-
ed on a pixel-by-pixel basis for each scan line. In this
way any synchronized video signal, including arbitrary
graphics, can be inserted on the screen (Figure 9).
Figure 7. 64 x 16 Nonblocking Matrix with Reduced Capacitive
Loading
IN (0–15)
IN (16–31)
IN (32–47)
IN (48–63)
OUTPUTS (0–15) OUTPUTS (16–32)
16
IN 16
OUT
16
IN 16
OUT
16
IN 16
OUT
16
IN 16
OUT
16
IN 16
OUT
16
IN 16
OUT
16
IN 16
OUT
16
IN 16
OUT
16
IN 16
OUT
16
IN 16
OUT
16
IN 16
OUT
16
IN 16
OUT
16
IN 16
OUT
16
IN 16
OUT
16
IN 16
OUT
16
IN 16
OUT
IN (64–79)
IN (80–95)
IN (96–111)
IN (112–127)
MAX4356
MAX4356
MAX4356
MAX4356
MAX4356
MAX4356
MAX4356
MAX4356
MAX4356
MAX4356
MAX4356
MAX4356
MAX4356
MAX4356
MAX4356
MAX4356
Figure 6. 128 x 32 Nonblocking Matrix Using 16 x 16 Crosspoint Devices
IN (0–15)
IN (16–31)
IN (32–47)
IN (48–63)
OUTPUTS (0–15)
16
IN 16
OUT
16
IN 16
OUT
16
IN 16
OUT
16
IN 16
OUT
16
IN 16
OUT
MAX4356
MAX4356
MAX4356
MAX4356
MAX4356
16
IN 16
OUT
MAX4356
MAX4356
16x16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
______________________________________________________________________________________ 37
This technique for inserting OSD display information is
an improvement over the way it has traditionally been
done. Other OSD techniques require an external fast
mux and a buffer for each output.
Crosstalk Signal and Board Routing Issues
Improper signal routing causes performance problems
such as crosstalk. The MAX4356 has a typical crosstalk
rejection of -62dB at 6MHz. A bad PC board layout
degrades the crosstalk rejection by 20dB or more. To
achieve the best crosstalk performance:
1) Place ground isolation between long critical sig-
nal PC board trace runs. These traces act as a
shield to potential interfering signals. Crosstalk can
be degraded by parallel traces as well as directly
above and below on adjoining PC board layers.
2) Maintain controlled-impedance traces. Design as
many of the PC board traces as possible to be 75Ω
transmission lines. This lowers the impedance of the
traces, reducing a potential source of crosstalk.
More power will be dissipated due to the output
buffer driving a lower impedance.
3) Minimize ground-current interaction by using a
good ground plane strategy.
In addition to crosstalk, another key issue of concern is
isolation. Isolation is the rejection of undesirable feed-
through from input to output with the output disabled.
The MAX4356 acheives a -110dB isolation at 6MHz by
selecting the pinout configuration such that the inputs
and outputs are on opposite sides of the package.
Coupling through the power supply is a function of the
quality and location of the supply bypassing. Use
appropriate low-impedance components and locate
them as close as possible to the IC. Avoid routing the
inputs near the outputs.
Power-Supply Bypassing
The MAX4356 operates from a single +5V or dual ±3V
to ±5V supplies. For single-supply operation, connect
all VEE pins to ground and bypass all power-supply
pins with a 0.1µF capacitor to ground. For dual-supply
systems, bypass all supply pins to ground with 0.1µF
capacitors.
Power in Large Systems
The MAX4356 has been designed to operate with split
supplies down to ±3V or a single supply of +5V.
Operating at the minimum supply voltages reduces the
power dissipation by as much 40% to 50%. At ±5V, the
MAX4356 consumes 195mW (0.76mW/point).
Driving a PC Board Interconnect or a
Cable (AV= +1V/V or +2V/V)
The MAX4356 output buffers can be programmed to
either AV= +1V/V or +2V/V. The +1V/V configuration is
typically used when driving a short-length (less than
3cm), high-impedance "local" PC board trace. To drive
a cable or a 75Ωtransmission line trace program the
gain of the output buffer to +2V/V and place a 75Ω
resistor in series with the output. The series termination
resistor and the 75Ωload impedance act as a voltage-
divider that divides the video signal in half. Set the gain
to +2V/V to transmit a standard 1V video signal down a
MONITOR 0
MONITOR 1
OSD
OUT0
SYNC0
SYNC1
SYNC0 OSDFILL0
OSDKEY0
OSDFILL1
OSDKEY1
OSDFILL15
OSDKEY15
SYNC1
SYNC15
SYNC15
OUT1
OUT15
IN0
CAMERAS
COMPUTER CONTROL
IN1
IN15
MONITOR 15
MAX4356
OSD
OSD
MEMORY
Figure 9. Improved Implementation of On-Screen Display
0
10
5
20
15
25
30
0 500
OPTIMAL ISOLATION RESISTANCE
vs. CAPACITIVE LOAD
CAPACITIVE LOAD (pF)
ISOLATION RESISTANCE (Ω)
200100 300 400
Figure 8. Optimal Isolation Resistor vs. Capacitive Load
MAX4356
16x16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
38 ______________________________________________________________________________________
cable. The series 75Ωresistor is called the back-match,
reverse termination, or series termination. This 75Ω
resistor reduces reflections, and provides isolation,
increasing the output capacitive driving capability.
Matrix Programming
The MAX4356’s unique digital interface simplifies pro-
gramming multiple MAX4356 devices in an array.
Multiple devices are connected with DOUT of the first
device connecting to DIN of the second device, and so
on (Figure 10). Two distinct programming modes, indi-
vidual output address mode (MODE = 0) and complete
matrix mode (MODE = 1), are selected by toggling a
single MODE control pin high or low. Both modes oper-
ate with the same physical board layout. This allows ini-
tial programming of the IC by daisy-chaining and
sending one long data word while still being able to
address immediately and update individual locations in
the matrix. Individual Output Address Mode (Mode 0)
In Individual Output Address Mode, the devices are
connected in a serial bus configuration, with the data
routing gate (Figure 3) connecting DIN to DOUT, mak-
ing each device a virtual node on the serial bus. A sin-
gle 16-bit control word is sent to all devices
simultaneously. Only the device with the corresponding
chip address responds to the programming word, and
updates its output. In this mode, the chip address is set
through hardware pin strapping of A3–A0. The host
then communicates with the device by sending a 16-bit
word consisting of 2 don’t care MSB bits, 4 chip
address bits, and 10 bits of data to make the word
exactly 2 bytes in length. The 10 data bits are broken
down into 4 bits to select the output to be programmed;
1 bit to set the output enable, 1 bit to set gain, and 4
bits to select the input to be connected to that output.
In this method, the matrix is programmed one output at
a time.
Complete Matrix Mode (Mode 1)
In Complete Matrix Mode, the devices are connected in
a daisy-chain fashion where n x 96 bits are sent to pro-
gram the entire matrix, and where n = the number of
MAX4356 devices connected in series. This long data
word is structured such that the first bit is the LSB of
the last device in the chain and the last data bit is the
MSB of the first device in the chain. The total length of
the data word is equal to the number of crosspoint
devices to be programmed in series, times 96 bits per
crosspoint device. This programming method is most
often used at startup to initially configure the switching
matrix.
+5V Single-Supply Operation with
AV= +1V/V and +2V/V
The MAX4356 guarantees operation with single +5V
supply and gain of +1V/V for standard video input sig-
nals (1Vp-p). To implement a complete video matrix
switching system capable of gain = +2V/V while operat-
ing with +5V single supply, combine the MAX4356
crosspoint switch with Maxim’s low-cost, high-perfor-
mance video amplifiers optimized for single +5V supply
operation (Figure 11). The MAX4450 single and
MAX4451 dual op amps are unity-gain-stable devices
that combine high-speed performance with Rail-to-
Rail®outputs. The common-mode input voltage range
extends beyond the negative power-supply rail (ground
in single-supply applications). The MAX4450 is avail-
able in the ultra-small 5-pin SC70 package, while the
MAX4451 is available in a space-saving 8-pin SOT23.
The MAX4383 is a quad op amp available in a 14-pin
TSSOP package. The MAX4380/MAX4381/MAX4382
and MAX4384 offer individual output high-impedance
disable making these amplifiers suitable for wired-OR
connections.
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
MAX4356
16x16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
______________________________________________________________________________________ 39
HOST
CONTROLLER
DIN
SCLK
CE
MODE
UPDATE
DOUT
CHIP ADDRESS = 0 CHIP ADDRESS = 1
VIRTUAL SERIAL BUS (MODE 0: INDIVIDUAL OUTPUT ADDRESS MODE)
CHIP ADDRESS = 2
A3
A2
A1
A0
MAX4356
DIN
SCLK
CE
MODE
UPDATE
DOUT
A3
VDD
A2
A1
A0
MAX4356
DIN
SCLK
CE
MODE
UPDATE
DOUT NEXT DEVICE
A3
A2
A1
A0
MAX4356 VDD
Figure 10. Matrix Mode Programming
U2
+5V
+5V
GND VEE
VCC
OUT0
OUT1
OUT15
IN0
IN1
IN15
1VP-P 2VP-P
MONITOR 0
75Ω
500ΩU2 = MAX4450
OR 1/4 MAX4383
500Ω
75Ω
Z0 = 75Ω
220µF
MAX4356
Figure 11. Typical Single +5V Supply Application
Chip Information
TRANSISTOR COUNT: 24,883
PROCESS: BiCMOS
MAX4356
16x16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
40 ______________________________________________________________________________________
AGND
AGND
AGND
VCC
OUT0
VEE
OUT1
VCC
OUT2
VEE
OUT3
VCC
OUT4
VEE
OUT5
VCC
OUT6
VEE
OUT7
VCC
OUT8
VEE
OUT9
VCC
OUT10
VEE
OUT11
VCC
OUT12
VEE
OUT13
VCC
OUT14
VEE
OUT15
VCC
AGND
AGND
DOUT
DGND
AOUT
SCLK
CE
MODE
RESET
UPDATE
DIN
VDD
OSDKEY15
OSDKEY14
OSDKEY13
OSDKEY12
OSDKEY11
OSDKEY10
OSDKEY9
OSDKEY8
OSDKEY7
OSDKEY6
OSDKEY5
OSDKEY4
OSDKEY3
OSDKEY2
OSDKEY1
OSDKEY0
VEE
IN3
AGND
IN2
AGND
IN1
AGND
IN0
AGND
ODSFILL15
ODSFILL14
ODSFILL13
ODSFILL12
ODSFILL11
ODSFILL10
ODSFILL9
ODSFILL8
ODSFILL7
ODSFILL6
ODSFILL5
ODSFILL4
ODSFILL3
ODSFILL2
ODSFILL1
ODSFILL0
N.C.
N.C.
N.C.
N.C.
N.C.
IN4
AGND
IN5
AGND
IN6
AGND
IN7
AGND
IN8
AGND
IN9
AGND
IN10
AGND
IN11
AGND
IN12
A3
IN13
A2
IN14
A1
IN15
A0
VCC
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
MAX4356
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
102
101
100
99
98
97
96
95
94
93
92
91
90
89
88
87
86
85
84
83
82
81
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
128
127
126
125
124
123
122
121
120
119
118
117
116
115
114
113
112
111
110
109
108
107
106
105
104
103
65
Pin Configuration
MAX4356
16x16 Nonblocking Video Crosspoint Switch
with On-Screen Display Insertion and I/O Buffers
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 41
© 2001 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.
Package Information
TQFP14x20x1.4mm.EPS