CALIFORNIA MICRO DEVICES
© 1993, 1996 CMD Corp. All rights reserved.
215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846
10/97 Rev. 2
PAC T
P/ACTIVE EMI/RFI T FILTER
Features
8 Filter Channels in Miniature QSOP Package
Ideal Frequency Response to Over 3 GHz
Low In-Band Insertion Loss Maintains Signal Integrity
Low Distortion Low Cross Talk
ESD Protected
Applications
EMI/RFI Filter
Low Pass Filter
SCSI Port Filter
LCD Panel Display Filter
Product Description
Note: CMDs P/Active TFilters are a higher performance, upgraded version of the original PRC200/210 series which
provides 2KV ESD protection, minimized lead inductance and parasitic capacitive effects (with added ground pins), and
improved crosstalk and filter performance characteristics at high data transmission rates. They exhibit almost ideal RC
characteristics to 3 GHz. The PAC T series is recommended for all new designs.
CMDs P/Active T is a highly integrated thin film resistor-capacitor network designed to suppress EMI/RFI noise at I/O ports
of personal computers and peripherals, workstations, Local Area Network (LAN), Asynchronous Transfer Mode (ATM), and
Wide Area Network (WAN). The filter includes ESD protection circuitry which prevents device destruction when subjected
to ESD discharges of greater than 2KV. The ESD protection circuitry permits the filter to operate on bipolar signals of up to
±6V. CMDs PAC T is housed in a surface mount package suitable for bottom side mounting to the board. This inte-
grated network solution minimizes space and routing problems and improves reliability and yields.
Why P/Active EMI/RFI filters? EMI/RFI filters are needed to suppress noise at low and high frequencies of the signal.
Ferrite beads, commonly used for EMI/RFI filtering, are bulky and ineffective at low frequencies and have saturation
problems at high frequencies. Resistor-capacitor networks offer the best technical approach for effective EMI/RFI filtering.
Also, conventional thick film-based EMI/RFI filters do not effectively suppress noise at high frequencies.
Pin Assignments
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
GND
Filt1
Filt2
Filt3
GND
Filt4
Filt5
GND
Filt6
Filt7
Filt8
GND
GND
Filt1
Filt2
Filt3
GND
Filt4
Filt5
GND
Filt6
Filt7
Filt8
GND
STANDARD SPECIFICATIONS
Absolute Tolerance (R) ±5%
Absolute Tolerance (C) ±10%
Absolute Tolerance (C=15pF) ±20%
Operating Temperature Range 0OC to 70OC
Power Rating/Resistor 100mW
Leakage Current 1 µA @ 25OC max.
Crosstalk < 5% (typical)
(see Test Circuit)
ESD Clamp
Positive Clamp > 6 Volts
Negative Clamp < -6 Volts
ESD Protection > 2 KV
Storage Temperature -65OC to +150OC
Package Power Rating 1.00W, max.
SCHEMATIC CONFIGURATION
2021222324 19 18 17 16 15 14 13
1211
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CALIFORNIA MICRO DEVICES
©1993, 1996 CMD Corp. All rights reserved.
215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 Rev. 2 10/97
100/150T 24 QSOP PAC100/150TQ/T PAC100/150TQ/R PAC100/150TQ
100/101T 24 QSOP PAC100/101TQ/T PAC100/101TQ/R PAC100/101TQ
150/470T 24 QSOP PAC150/470TQ/T PAC150/470TQ/R PAC150/470TQ
250/101T 24 QSOP PAC250/101TQ/T PAC250/101TQ/R PAC250/101TQ
250/201T 24 QSOP PAC250/201TQ/T PAC250/201TQ/R PAC250/201TQ
330/470T 24 QSOP PAC330/470TQ/T PAC330/470TQ/R PAC330/470TQ
330/101T 24 QSOP PAC330/101TQ/T PAC330/101TQ/R PAC330/101TQ
330/221T 24 QSOP PAC330/221TQ/T PAC330/221TQ/R PAC330/221TQ
390/500T 24 QSOP PAC390/500TQ/T PAC390/500TQ/R PAC390/500TQ
390/221T 24 QSOP PAC390/221TQ/T PAC390/221TQ/R PAC390/221TQ
470/330T 24 QSOP PAC470/330TQ/T PAC470/330TQ/R PAC470/330TQ
470/470T 24 QSOP PAC470/470TQ/T PAC470/470TQ/R PAC470/470TQ
101/101T 24 QSOP PAC101/101TQ/T PAC101/101TQ/R PAC101/101TQ
STANDARD PART ORDERING INFORMATION
Package Ordering Part Number
RC Code Pins Style* Tubes Tape & Reel Part Marking
fc @ 3db
1063 MHz
160 MHz
226 MHz
64 MHz
32 MHz
103 MHz
27 MHz
22 MHz
82 MHz
19 MHz
103 MHz
72 MHz
16 MHz
RC Code
100/150T
100/101T
150/470T
250/101T
250/201T
330/470T
330/101T
330/221T
390/500T
390/221T
470/330T
470/470T
101/101T
C (pf)
15
100
47
100
200
47
180
220
50
220
33
47
100
R (Ω)
10
10
15
25
25
33
33
33
39
39
47
47
100
* Also available in 300 mil wide SOIC package. Contact your
local CMD Sales Representative or the factory for availability.
PAC T
STANDARD VALUES
 with 0 source impedance
Filter Cross Talk Test Circuit (TA=25oC) 50 Ohm
50
V
Pulse Generator
5 volt, 10 MHz,
> 1nS Rise /
Fall Time
V=Victim Voltage
CALIFORNIA MICRO DEVICES
© 1993, 1996 CMD Corp. All rights reserved.
215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846
10/97 Rev. 2
PAC T
S parameters are measured using a Hewlett Packard HP8753C Network Analyzer with a
HP85047A S-parameter Test Set.
Filter Insertion Loss (S12, dB), Typical (TA = 25°C) Representative Sample
0
-10
-20
-30
10 MHz
15 Filter
Ω
100 MHz
S12
(dB)
47 pF
1GHz
10 MHz
100 Filter
Ω
100 MHz
S12
(dB)
47 pF
1GHz
0
-20
-40
-10
-30
-50
-10
-30
-50
-10
-30
-50
10 MHz
10 Filters
Ω
S12
(dB)
100 MHz
15 pF
100 pF
1GHz
10 MHz
39 Filters
Ω
S12
(dB)
100 MHz
220 pF
50 pF
1GHz
10 MHz
33 Filters
Ω
S12
(dB)
100 MHz
220 pF
180 pF
47 pF
1GHz
0
-10
-20
-30
-40
-50
10 MHz
25 Filters
Ω
S12
(dB)
100 MHz
100 pF
200 pF
1GHz
0
-10
-20
-30
10 MHz
47 Filters
Ω
S12
(dB)
100 MHz
33 pF
47 pF
1GHz
ATTENUATION CURVES
CALIFORNIA MICRO DEVICES
©1993, 1996 CMD Corp. All rights reserved.
215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 Rev. 2 10/97
QSOP - TOP VIEW
PAC T