© 2001 California Micro Devices Corp. All rights reserved.
2/14/2001
1
215 Topaz Street, Milpitas, California 95035
Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com
PRC207
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
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.
Applications
· Clock termination
· Point of contact filtering
· Low pass filtering
· EMI/RFI filtering
C1720101
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.
R
1
3
2
PRC207
C
SCHEMATIC CONFIGURATION
©2001 California Micro Devices Corp. All rights reserved.
2/14/2001
215 Topaz Street, Milpitas, California 95035
Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com
2
PRC207
CALIFORNIA MICRO DEVICES
* with 0 source impedance
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.
PRC207 XXX
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%
Capacitance Code
· First 2 digits are significant
value.
· Third digit represents
number of zeros to follow
e.g., code for 68pF is 680.
Capacitor Tolerance
K = ±10%
M = ±20%
M
M
/ XXX
Part Number Key
TYPICAL VALUES
R(
)
C(pF)
Breakdown
fc @ 3db*
Voltage MAX
33
47 30V
103MHz
47
47 30V
72MHz
47
33 30V
103MHz
50
68 30V
47MHz
75
50 30V
42MHz
100
100 10V 16MHz
50
180 10V 18MHz
40
50 30V
80MHz
STANDARD SPECIFICATIONS
Resistance Range
15 to 100
Capacitance Range
10 to 100pF
Absolute Tolerance (R)
±10%
Absolute Tolerance (C)
±20%
Operating Temperature Range
55
°C to 125°C
Power Rating/Resistor
100mW
Storage Temperature
60
°C to 150°C
Package Power Rating
1W, MAX
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