ICS7152A Datasheet, PDF (1/10 Pages) Integrated Circuit Systems – Spread Spectrum Clock Generator

ICS7152A
Spread Spectrum Clock Generator
Description
The ICS7152A-02 and -11 are clock generators for EMI
(Electromagnetic Interference) reduction (see below for
frequency ranges and multiplier ratios). Spectral peaks
are attenuated by modulating the system clock
frequency. Down or center spread profiles are
selectable. Down spread will not exceed the maximum
frequency of an unspread clock, and center spread
does not change the average operating frequency of
the system
ICS offers many other clocks for computers and
computer peripherals. Consult ICS when you need to
remove crystals and oscillators from your board.
Features
• 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)
• Low cycle-to-cycle jitter - less than 100 ps
• Advanced, low-power CMOS process
• Industrial and commercial temperature ranges
• Available in Pb (lead) free package
• Pin compatible with Fujitsu MB88152-102 and -111
Block Diagram
VDD
SEL
FREQ
XENS
XIN
XOUT
Clock Buffer/
Crystal
Ocsillator
External caps required with crystal for
accurate tuning of the clock
PLL Clock
Synthesis
and Spread
Spectrum
Circuitry
GND
CKOUT
Product Lineup
Product
ICS7152AM-02, ICS7152AMI-02
ICS7152AM-11, ICS7152AMI-11
Input Frequency Range
40.0 MHz to 134.0 MHz
16.6 MHz to 67.0 MHz
Modulation Type Modulation Enable Pin
Down spread
Yes
Center spread
MDS 7152A A
1
Revision 102005
Integrated Circuit Systems, Inc. ● 525 Race Street, San Jose, CA 95126 ● tel [phone] ● www.icst.com