ICS172611 datasheet(1/7 Pages) ICST

Part #	ICS172611

Description	Low EMI Clock Generator

PDF	7 Pages

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Manufacturer	ICST [Integrated Circuit Systems]

Direct Link	http://www.icst.com

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ICS1726-11

MDS 1726-11 A

1

Revision 092905

Integrated Circuit Systems, Inc.

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

Low EMI Clock Generator

PRELIMINARY INFORMATION

Description

The ICS1726-11 generates a low EMI output clock

from a clock or crystal input. The part is designed to

dither the LCD interface clock for PDAs, printers,

scanners, modems, copiers, and others. Using ICS’

proprietary mix of analog and digital Phase-Locked

Loop (PLL) technology, the device spreads the

frequency spectrum of the output, reducing the

frequency amplitude peaks by several dB. The

ICS1726-11 offers both centered and down spread

from a high-speed clock input.

ICS offers many other clocks for computers and

computer peripherals. Consult us when you need to

remove crystals and oscillators from your board.

Features

• Packaged in 8-pin SOIC/TSSOP

• Provides a spread spectrum output clock

• Supports flat panel controllers

• Accepts a clock or crystal input (provides same

frequency dithered output)

• Input frequency range of 16 to 32 MHz

• Output frequency range of 16 to 32 MHz

• Center and down spread

• Peak reduction by 8 dB to 16 dB typical on 3rd

through 19th odd harmonics

• Low EMI feature can be disabled

• Includes power down

• Operating voltage of 3.3 V

• Advanced, low-power CMOS process

Block Diagram

PLL Clock

Synthesis

and Spread

Spectrum

Circuitry

X1

S1:0

SSCLK

2

GND

VDD

Clock Buffer/

Crystal

Ocsillator

X1/CLK

X2

External caps required for with crystal

for accurate tuning of the clock

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ICS172611 Datasheet(PDF) 1 Page - Integrated Circuit Systems

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