ICS7152
Spread Spectrum Clock Generator
Description
The ICS7152-01, -02, -11, and -12 are clock
generators for EMI (Electro Magnetic Interference)
reduction (see below for frequency ranges and
multiplier ratios). Spectral peaks can be attenuated by
slightly modulating the oscillation frequency. Both down
and center spread profiles are selectable. Center
spread maintains an average frequency equal to an
unspread clock. Down spread meets maximum
frequency specs over the entire modualtion cycle.
Features
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•
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Operating voltage of 3.3 V ±0.3 V
Packaged in 8-pin SOIC
Input frequency range of 16.6 to 134.0 MHz
Output frequency range of 16.6 to 134.0 MHz
Provides a spread spectrum clock output (±0.5%,
±1.5% center spread; -1.0%, -3.0% down spread)
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Advanced, low-power CMOS process
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Industrial temperature range available
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Available in Pb (lead) free package
Block Diagram
VDD
SEL
FREQ
XENS
XIN
PLL Clock
Synthesis
and Spread
Spectrum
Circuitry
Clock Buffer/
Crystal
Ocsillator
CKOUT
XOUT
External caps required with crystal for
accurate tuning of the clock
GND
Product Lineup
Product
Input Frequency Range
Modulation Type
Modulation Enable Pin
ICS7152M-01, ICS7152MI-01
ICS7152M-02, ICS7152MI-02
ICS7152M-11, ICS7152MI-11
ICS7152M-12, ICS7152MI-12
16.6 MHz to 67 MHz
40.0 MHz to 134.0 MHz
16.6 MHz to 67.0 MHz
40.0 MHz to 134.0 MHz
Down spread
Yes
Center spread
MDS 7152 E
Integrated Circuit Systems, Inc.
●
1
525 Race Street, San Jose, CA 95126
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Revision 012306
tel (408) 297-1201
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www.icst.com
ICS [ INTEGRATED CIRCUIT SYSTEMS ]
