ICS7151A Datasheet, PDF (1/8 Pages) Integrated Circuit Systems – Spread Spectrum Clock Generator

ICS7151A-50
Spread Spectrum Clock Generator
Description
The ICS7151A-50 is a clock generator for EMI
(Electromagnetic Interference) reduction. 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
• Available in Pb (lead) free package
• Input frequency range of 16.5 to 33.4 MHz
• Output frequency ranges of 8.3 to 16.7 MHz
• Provides a spread spectrum clock output (±0.5%,
±1.5% center spread; -1.0%, -3.0% down spread)
• Multiplication rate of x1/2
• Advanced, low-power CMOS process
• Pin compatible with the Fujitsu MB88151-500
Block Diagram
VDD
S1:0 ²
ENS
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
MDS 7151A-50 A
1
Revision 102005
Integrated Circuit Systems, Inc. ● 525 Race Street, San Jose, CA 95126 ● tel [phone] ● www.icst.com