ICS7151A datasheet(1/8 Pages) ICST

部件名	ICS7151A

功能描述	Spread Spectrum Clock Generator

PDF	8 Pages

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制造商	ICST [Integrated Circuit Systems]

网页	http://www.icst.com

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ICS7151A-50

MDS 7151A-50 A

1

Revision 102005

Integrated Circuit Systems, Inc.

● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com

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

PLL Clock

Synthesis

and Spread

Spectrum

Circuitry

S1:0

ENS

CKOUT

2

GND

VDD

Clock Buffer/

Crystal

Ocsillator

XIN

XOUT

External caps required with crystal for

accurate tuning of the clock

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