PACTF
CALIFORNIA MICRO DEVICES
P/ACTIVE EMI/RFITAPPED 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: CAMDs P/Active Tapped Filters are a higher performance, upgraded versions of the original PRC201/211/221 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 charac-
teristics to 3GHz. The PACTF series is recommended for all new designs.
CAMDs P/Active Tapped Filter 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. CAMDs PACTF is housed in a surface mount package suitable for bottom side mounting to the board. This
integrated 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.
STANDARD SPECIFICATIONS
SCHEMATIC CONFIGURATION
Absolute Tolerance (R)
Absolute Tolerance (C)
Absolute Tolerance (C=15pF)
Operating Temperature Range
Power Rating/Resistor
Leakage Current
±10%
±10%
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
1
2
3
4
5
6
7
8
9
10 11 12
Positive Clamp
> 6 Volts
Negative Clamp
ESD Protection
Storage Temperature
Package Power Rating
< -6 Volts
> 2 KV
-65OC to +150OC
1.00W, max.
© 2000 California Micro Devices Corp. All rights reserved.
C1090600
6/7/2000
215 Topaz Street, Milpitas, California 95035
Tel: (408) 263-3214
Fax: (408) 263-7846
www.calmicro.com
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