FSTD16211 - Fairchild Semiconductor

June 2000

Revised November 2002

FSTD16211 24-Bit Bus Switch with Level Shifting

FSTD16211

24-Bit Bus Switch with Level Shifting

General Description

The Fai rchild Swit ch FSTD162 11 pro vides 24-bit s of high-

speed CMOS TTL-compatible bus switching. The low On

Resistance of the switch allows inputs to be connected to

outputs without adding propagation delay or generating

addition al ground boun ce noise. A diode to VCC has been

integrated into the circuit t o a llow for leve l shifting b etween

5V inputs and 3.3V outputs.

The device is organized as a 12-bit or 24-bit bus switch.

When OE1 is LOW, the switch is ON and Port 1A is con-

nected to Port 1B. When OE2 is LOW , Port 2A is connected

to Port 2B. When OE1/2 is HIGH, a high impedance state

exists between the A and B Ports.

Features

■4Ω switch connection between two ports

■Voltage level shifting

■Minimal propagation delay through the switch

■Low lCC

■Zero bounce in flow-through mode

■Control inputs compatible with TTL level

■Also packaged in plastic Fine-Pitch Ball Grid Array

(FBGA)

Ordering Code:

Note 1: Order ing code “G” indicat es T r a ys.

Note 2: Devices also availab le in Tape and Reel. Specif y by append ing the suffix let t er “X” to the ordering c ode.

Logic Diagram

Order Number Package Number Package Description

FSTD16211G

(Note 1)(Note 2) BGA54A 54-Ball Fine-Pitch Ball Grid Array (FBGA), JEDEC MO-205, 5.5mm Wide

[TAPE and REEL]

FSTD16211MTD

(Note 2) MTD56 56-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide

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FSTD16211

Connection Diagrams

Pin Assignment for TSSOP

Pin Assignment for FBGA

(Top Thru View)

Pin Descriptions

Pin Assignment for FBGA

Truth Table

Pin Name Description

OE1, OE2Bus Switch Enables

1A, 2A Bus A

1B, 2B Bus B

NC No Connect

123456

A1A21A1NC OE21B11B2

B1A41A31A7OE11B31B4

C1A61A5GND 1B71B51B6

D1A10 1A91A81B81B91B10

E1A12 1A11 2A12B11B11 1B12

F2A42A32A22B22B32B4

G2A62A5VCC GND 2B52B6

H2A82A72A92B92B72B8

J2A12 2A11 2A10 2B10 2B11 2B12

Inputs Inputs/Outputs

OE1OE21A, 1B 2A, 2B

LL1A

= 1B 2A = 2B

LH1A

= 1B Z

HLZ2A

= 2B

HHZZ

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FSTD16211

Absolute Maximum Ratings(Note 3) Recommended Operating

Conditions (Note 6)

Note 3: The “A bsolute Maximum Ratings” are those value s beyond which

the saf ety of the device cannot be gu aranteed. Th e device shou ld not be

operated at these limits. The parametric values defined in the Electrical

Characteristics tables are not guaranteed at the absolute maximum rating.

The “R ecomm ended Ope rating Co ndition s” table will define the condit ions

for actu al device operation.

Note 4: VS is the voltage observed/applied at either A or B Ports across the

switch.

Note 5: The input and output negative voltage ratings may be exceeded if

the in put and output diode cu rrent ratings are observed.

Note 6: Unused control inputs must be held HIGH or LOW. They may not

float.

DC Electrical Characteristics

Note 7: Typical valu es are at VCC = 5.0V and TA= +25°C

Note 8: Measured by the volta ge drop be tween A an d B pins at th e indicate d c urrent thr ough the switch. On R es istanc e is determi ned by the lower of the

voltages on the tw o (A or B) pins.

Supply Voltag e (VCC)−0.5V to +7.0V

DC Switch V oltage (VS) (Note 4) −0.5V to +7.0V

DC Input Control Pin Voltage (VIN)(N o te 5) −0.5V to +7.0V

DC Input Diode Current (lIK) VIN < 0V −50 mA

DC Output (IOUT) 128 mA

DC VCC/GND Current (ICC/IGND)+/− 100 mA

Storage Temperature Range (TSTG)−65°C to +150 °C

Power Su pply Ope rat i ng (VCC) 4.5V to 5.5V

Input Voltage (VIN) 0V to 5.5V

Output Voltage (VOUT) 0V to 5.5V

Input Rise and Fall Time (tr, tf)

Switch Control Input 0 ns/V to 5 ns/V

Switch I/O 0 ns/V to DC

Free Air Operating Temperature (TA)-40 °C to +85 °C

Symbol Parameter VCC TA = −40 °C to +85 °CUnits Conditions

(V) Min Typ

(Note 7) Max

VIK Clamp Diode Voltage 4.5 −1.2 V IIN = −18 mA

VIH HIGH Level Input Voltage 4.5–5.5 2.0 V

VIL LOW Level Input Voltage 4.5–5.5 0.8 V

VOH HIGH Level 4.5–5.5 See Figure 3 V

IIInput Leakage Current 5.5 ±1.0 µA0 ≤ VIN ≤ 5.5V

010µAV

IN = 5.5V

IOZ OFF-STATE Leakage Current 5.5 ±1.0 µA0 ≤ A, B ≤ VCC

RON Switch On Resistance 4.5 4 7 ΩVIN = 0V, IIN = 64 mA

(Note 8) 4.5 4 7 ΩVIN = 0V, IIN = 30 mA

4.5 35 50 ΩVIN = 2.4V, IIN = 15 mA

ICC Quiescent Supply Current 5.5 1.5 mA OE1 = OE2 = GND

VIN = VCC or GND, IOUT = 0

10 µAOE

1 = OE2 = VCC

VIN = VCC or GND, IOUT = 0

∆ ICC Increase in ICC per Input 5.5 2.5 mA One Input at 3.4V

Other Inputs at VCC or GND

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FSTD16211

AC Electrical Characteristi cs

Note 9: This parameter is guaranteed by design but is not tested. The bus switch contributes no propagation delay other than the RC delay of the typical On

Resis t ance of th e s w it c h and the 50pF load ca pacitanc e, when driv en by an ideal volta ge s ource (ze ro output im pedance).

Capacitance (Note 10)

Note 10: TA = +25°C, f = 1 MHz, Capacitance is characteri zed but not te s t ed.

AC Loading and Waveforms

Note: Input driven by 50Ω source terminated in 50Ω

Note: CL includes load and stray capacitance

Note: Input PRR = 1.0 MHz, tW = 500 ns

FIGURE 1. AC Test Circuit

FIGURE 2. AC Waveforms

Symbol Parameter

TA = −40 °C to +85 °C,

Units Conditions

CL = 50pF, RU = RD = 500ΩFigure

VCC = 4.5 – 5.5V Number

Min Max

tPHL, tPLH Propagation Delay Bus to Bus (Note 9) 0.25 ns VI = OPEN Figures

1, 2

tPZH, tPZL Output Enable Time 1.5 5.5 ns VI = 7V for tPZL Figures

1, 2

VI = OPEN for tPZH

tPHZ, tPLZ Output Disable Time 1.5 6.5 ns VI = 7V for tPLZ Figures

1, 2

VI = OPEN for tPHZ

Symbol Parameter Typ Max Units Conditions

CIN Control Pin Input Capacitance 3.5 pF VCC = 5.0V

CI/O Input/Output Capacitance 5.5 pF VCC, OE = 5.0V

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FSTD16211

Output Voltage HIGH vs. Supply Voltage

FIGURE 3.

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FSTD16211

Physical Dimensions inches (millimeters) unless otherwise noted

54-Ball Fine-Pitch Ball Grid Array (FBGA), JEDEC MO-205, 5.5mm Wide

Packag e Num b er BGA5 4A

Physical Dimensions inches (millimeters) unless otherwise noted (Continued)

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FSTD16211 24-Bit Bus Switch with Level Shifting

Physical Dimensions inches (millimeters) unless otherwise noted (Continued)

56-Lea d Th in S hri n k Small Ou tlin e Pack age (TSSOP ), JED EC MO-1 53, 6.1mm Wide

Package Number MTD56

Technology Description

The Fairchild Switch family derives fro m and embodies Fairchild’s proven switch t echnology used for several years in its

74LVX3L384 (FST3384) bus switch product.

Fairchild does not assume an y responsibility for u se of any circuitry described, no circuit patent license s are implied and

Fairchild reserves the right at any time without notice to change said circuitry and specifications.

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FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT

DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD

SEMICONDUCTOR CORPORATION. As used herein:

1. Life suppor t de vices o r syst ems are dev ic es or syste ms

which, (a) are intended for surgical implant into the

body, or (b) support or sustain life, and (c) whose failure

to perform when properly used in accordance with

instruct ions fo r use pr ovi de d in the l abe ling, can be rea-

sonably expected to result in a significant injury to the

user.

2. A crit ical componen t in any com ponen t of a life s uppor t

device or system whose failure to perform can be rea-

sonabl y e xpec ted to cause th e fa i lure of the l ife s upport

device or system, or to affect its safety or effectiveness.