CALIFORNIA MICRO DEVICES
PRC207
Clock Terminator and Local EMI/RFI Filter
Features
鈥?Filters at source of emissions
鈥?Stable resistor-capacitor network
鈥?Ideal for high-speed logic
鈥?Low lead inductance
鈥?Reduces board space compared to discretes
鈥?3-Pin SOT-23 package
Applications
鈥?Clock termination
鈥?Point of contact filtering
鈥?Low pass filtering
鈥?EMI/RFI filtering
Product Description
High speed microprocessors like Intel鈥檚 Pentium
廬
, DEC鈥檚
Alpha, Motorola鈥檚 68K and PowerPC, Sun鈥檚 SPARC,
MIPs, and other RISC-based systems require well-
controlled and precise clock signals to maintain a high
performance synchronous system. However, very fast
edge rated clock signals exhibit transmission line effects
on the clock lines resulting in undershoot and overshoot
disturbances.
CAMD鈥檚 PRC207 SOT resistor-capacitor integrated thin
film networks are specifically designed to eliminate
transmission line effects on high speed clock and data
lines. They are effective in suppressing EMI/RFI noise at
I/O ports and can also be used as 鈥渄istributed鈥?AC
terminators when filtered lines are dispersed across the
board.
These networks are fabricated on a silicon substrate
using advanced thin film technology. They have low
parasitic inductance compared to discrete and conven-
tional thick film filters and provide effective AC termina-
tion and EMI/RFI noise suppression over a wide range of
frequencies.
Why thin film RC networks? The PRC207 is an inte-
grated RC network fabricated on a silicon substrate
using advanced thin film technology. This technology
insures a fixed time constant and does not create
additional skew on the clock lines. It offers very low
parasitic inductance compared to conventional discrete
thick film-based approaches and provides effective
termination at high frequencies.
SCHEMATIC CONFIGURATION
PRC207
3
C
R
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漏 2001 California Micro Devices Corp. All rights reserved.
C1720101
215 Topaz Street, Milpitas, California 95035
5/22/2001
Tel: (408) 263-3214
Fax: (408) 263-7846
www.calmicro.com
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