PRC207 Datasheet, PDF (1/2 Pages) California Micro Devices Corp – CLOCK TERMINATOR AND LOCAL EMI/RFI FILTER

CALIFORNIA MICRO DEVICES
Clock Terminator and Local EMI/RFI Filter
Features
• Filters at source of emissions
• Stable resistor-capacitor network
• Ideal for high-speed logic
• Low lead inductance
• Reduces board space compared to discretes
• 3-Pin SOT-23 package
Applications
• Clock termination
• Point of contact filtering
• Low pass filtering
• EMI/RFI filtering
PRC207
Product Description
High speed microprocessors like Intel’s Pentium^®, DEC’s
Alpha, Motorola’s 68K and PowerPC, Sun’s 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’s 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 “distributed” 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
2
C
R
1
3
© 2001 California Micro Devices Corp. All rights reserved.
215 Topaz Street, Milpitas, California 95035 
2/14/2001
Tel: [phone]
Fax: [phone]
C1720101
www.calmicro.com
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