CALIFORNIA MICRO DEVICES
PAC T
P/ACTIVE EMI/RFI T FILTER
Features
Pin Assignments
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
1
2
GND
Filt1
Filt2
Filt3
GND
Filt4
Filt5
GND
Filt6
Filt7
Filt8
GND
GND
Filt1
Filt2
Filt3
GND
Filt4
Filt5
GND
Filt6
Filt7
Filt8
GND
24
23
22
21
20
19
18
17
16
15
14
13
3
4
5
6
Applications
EMI/RFI Filter
Low Pass Filter
SCSI Port Filter
LCD Panel Display Filter
7
8
9
10
11
12
Product Description
Note: CMDs 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.
CMDs 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. CMDs 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.
SCHEMATIC CONFIGURATION
STANDARD SPECIFICATIONS
Absolute Tolerance (R)
±5%
±10%
Absolute Tolerance (C)
Absolute Tolerance (C=15pF)
Operating Temperature Range
Power Rating/Resistor
Leakage Current
24 23 22 21 20 19 18 17 16 15 14 13
±20%
0OC to 70OC
100mW
1 µA @ 25OC max.
< 5% (typical)
Crosstalk
(see Test Circuit)
ESD Clamp
Positive Clamp
> 6 Volts
1
2
3
4
5
6
7
8
9
10 11 12
Negative Clamp
< -6 Volts
ESD Protection
Storage Temperature
Package Power Rating
> 2 KV
-65OC to +150OC
1.00W, max.
© 1993, 1996 CMD Corp. All rights reserved.
10/97 Rev. 2
215 Topaz Street, Milpitas, California 95035
Tel: (408) 263-3214
Fax: (408) 263-7846