
© 2000 California Micro Devices Corp. All rights reserved.
4/00 215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com 1
CALIFORNIA MICRO DEVICES PACTFSERIES
P/ACTIVE® CLOCK TERMINATION AND FILTER
Features
8 Channels in Miniature QSOP Package
Frequency Response to greater than 3 GHz
Low In-Band Insertion Loss Maintains
Signal Integrity
Low Distortion, Low Cross Talk
ESD Protected
Applications
High speed microprocessor clock termination
Product Description
High speed microprocessor systems require well controlled, precise, fast edge-rate clock signals. Clock lines behave as
transmission lines for fast-edge signals and therefore the lines may exhibit transients caused by reflections and switching
noise. The PACTF clock filter reduces reflections and slows down edges to help reduce EMI/RFI radiation.
California Micro Devices P/Active Tapped Filter is an integrated thin film resistor-capacitor network designed to filter clock
lines and suppress EMI/RFI noise in personal computers and peripherals, workstations, Local Area Network (LAN), Asynchro-
nous Transfer Mode (ATM), and Wide Area Network (WAN). The filter includes ESD protection circuitry which prevents
device destruction when subjected to ESD discharges less than 2KV. The ESD protection circuitry permits the filter to
operate on bipolar signals of up to ±6V. California Micro Devices PAC TF 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.
SCHEMATIC CONFIGURATION
2021222324 19 18 17 16 15 14 13
1211
12345678910
* ESD Protection level guaranteed by design.
C0380798
Pin Assignments
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rotsiseR/gnitaRrewoP
Wm001
tnerruCegakaeL .xamCº52@Aµ1
)tiucriCtxeTees(klatssorC )lacipyt(%5<
pmalCDSE
pmalCevitisoP
pmalCevitageN
6>stloV
-<6stloV
*noitcetorPDSE.nimVK2
erutarepmeTegarotSC°051otC°06-
gnitaRrewoPegakcaP.xam,W00.1