ICS18003 datasheet(1/6 Pages) ICST

No de pièce	ICS18003

Description	Low EMI Clock Generator

PDF	6 Pages

Scroll/Zoom	100%

Fabricant	ICST [Integrated Circuit Systems]

Site Internet	http://www.icst.com

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ICS180-03

Low EMI Clock Generator

MDS 180-03 A

1

Revision 110404

Integrated Circ uit Systems l5 25 Race Street, San Jo se, CA 9 512 6 l tel (408 ) 29 7-120 1 l

www.ics t.co m

Description

The ICS180-03 generates a low EMI output clock from

a clock or crystal input. The device uses ICS’

proprietary mix of analog and digital Phase Locked

Loop (PLL) technology to spread the frequency

spectrum of the output, thereby reducing the frequency

amplitude peaks by several dB.

The ICS180-03 offers down spread selection of -1.25%

and -3.75%. Refer to the MK1714-01/02 for the widest

selection of input frequencies and multipliers.

ICS offers a complete line of EMI reducing clock

generators. Consult us when you need to remove

crystals and oscillators from your board.

Features

• Pin and function compatible to Cypress W180-03

• Packaged in 8-pin SOIC

• Provides a spread spectrum output clock

• Accepts a clock input and provides same frequency

dithered output

• Input frequency of 15 to 28 MHz

• Peak reduction by 7dB - 14dB typical on 3rd - 19th

odd harmonics

• Spread percentage selection for -1.25% and -3.75%

• Operating voltage of 3.3 V and 5 V

• Advanced, low-power CMOS process

Block Diagram

PLL Clock

Synthesis

and Spread

Spectrum

Circuitry

SS%

CLK

GND

VDD

SSON#

X1/CLKIN

X2

Clock Buffer/

Crystal

Oscillator

FS1

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