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
®
, 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.
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 100Ω
10 to 100pF
±10%
±20%
–55°C to 125°C
100mW
–60°C to 150°C
1W, MAX
TYPICAL VALUES
R(Ω)
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 56Ω is 560
Resistor Tolerance
J = ±5%
K = ±10%
M = ±20%
©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.
2
215 Topaz Street, Milpitas, California 95035
Tel: (408) 263-3214
Fax: (408) 263-7846
www.calmicro.com
2/14/2001
Real-time operating system RTOS
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