© 2001 California Micro Devices Corp. All rights reserved.
2/28/2001
1
215 Topaz Street, Milpitas, California 95035
Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com
PRC298/299
CALIFORNIA MICRO DEVICES
Clock Terminator
Features
· Stable resistor-capacitor network
· Ideal for high-speed logic
· Low lead inductance
· Reduces board space compared to discretes
· SOT Packages
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 PRC298/299 SOT resistor-capacitor integrated
thin film networks are specifically designed to eliminate
transmission line effects on high speed clock and data
lines.
Application
· Clock termination
C1730201
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.
Why thin film RC networks? The PRC298/299 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 CONFIGURATIONS
R
4
PRC298
(SOT-143)
1
C
R
3
R
2
C
C
R
3
2
PRC299
(SOT-23)
R
1
C
C
©2001 California Micro Devices Corp. All rights reserved.
2/28/2001
215 Topaz Street, Milpitas, California 95035
Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com
2
PRC298/299
CALIFORNIA MICRO DEVICES
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
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
TYPICAL VALUES
Part Number
Resistor
Capacitor
Breakdown
Value
(
) Tolerance
Value (pF)
Tolerance
Voltage (MAX)
PRC298
33
±10%
47pF ±20%
25V
PRC298
47
±10%
47pF ±20%
25V
PRC298
47
±10%
33pF ±20%
25V
PRC298
50
±10%
68pF ±20%
25V
PRC298
75
±10%
50pF ±20%
25V
PRC298
100
±10%
100pF
±20%
10V
PRC298
40
±10%
50pF ±20%
25V
PRC299
33
±10%
47pF ±20%
45V
PRC299
47
±10%
47pF ±20%
45V
PRC299
47
±10%
33pF ±20%
45V
PRC299
50
±10%
68pF ±20%
45V
PRC299
75
±10%
50pF ±20%
45V
PRC299
100
±10%
100pF
±20%
10V
PRC299
40
±10%
50pF ±20%
45V
PRC299
50
±10%
100pF ±20%
10V
PRC299
50
±10%
68pF ±10% 45V
PRC299
47
±5%
47pF ±20%
45V
PRC299
50
±20%
100pF ±20%
10V
PRC299
33
±5%
47pF ±20%
45V
© 2001 California Micro Devices Corp. All rights reserved.
2/28/2001
3
215 Topaz Street, Milpitas, California 95035
Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com
PRC298/299
CALIFORNIA MICRO DEVICES
PRC289
PRC299 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
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