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CALIFORNIA MICRO DEVICES
PRC207
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
Product Description
High speed microprocessors like Intel's Pentium(R), DEC's Alpha, Motorola's 68K and PowerPC, Sun's SPARC, MIPs, and other RISC-based systems require wellcontrolled 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 conventional thick film filters and provide effective AC termination and EMI/RFI noise suppression over a wide range of frequencies. Why thin film RC networks? The PRC207 is an integrated 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
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3
(c) 2001 California Micro Devices Corp. All rights reserved.
C1720101
215 Topaz Street, Milpitas, California 95035
2/14/2001
Tel: (408) 263-3214
Fax: (408) 263-7846
www.calmicro.com
1
CALIFORNIA MICRO DEVICES
PRC207
California Micro Devices can develop a fully customized solution which embodies the configuration shown in this data sheet or modified to suit specific application requirements. A Non-Recurring Engineering (NRE) charge will apply for all fully customized requirements and a minimum order/lot will be required. Please direct your detailed circuit configuration and specification requirements to your local CAMD representative or to the factory for a quotation.
STANDARD SPECIFICATIONS
Resistance Range Capacitance Range Absolute Tolerance (R) Absolute Tolerance (C) Operating Temperature Range Power Rating/Resistor Storage Temperature Package Power Rating 15 to 100 10 to 100pF 10% 20% -55C to 125C 100mW -60C to 150C 1W, MAX
TYPICAL VALUES
R() 33 47 47 50 75 100 50 40 C(pF) 47 47 33 68 50 100 180 50 Breakdown Voltage MAX 30V 30V 30V 30V 30V 10V 10V 30V fc @ 3db* 103MHz 72MHz 103MHz 47MHz 42MHz 16MHz 18MHz 80MHz
* with 0 source impedance
Part Number Key
PRC207 XXX M / XXX M Part Series Resistance Code * First 2 digits are significant value * Third digit represents number of zeros to follow e.g., code for 56 is 560 Resistor Tolerance J = 5% K = 10% M = 20%
(c)2001 California Micro Devices Corp. All rights reserved.
Capacitor Tolerance K = 10% M = 20% Capacitance Code * First 2 digits are significant value. * Third digit represents number of zeros to follow e.g., code for 68pF is 680.
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215 Topaz Street, Milpitas, California 95035
Tel: (408) 263-3214
Fax: (408) 263-7846
www.calmicro.com
2/14/2001

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