ICS650-44 datasheet(1/10 Pages) ICST

Part #	ICS650-44

Description	Spread Spectrum Clock Synthesizer

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Manufacturer	ICST [Integrated Circuit Systems]

Direct Link	http://www.icst.com

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ICS650-44

MDS 650-44 C

1

Revision 080305

Integrated Circuit Systems, Inc.

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

Spread Spectrum Clock Synthesizer

PREL IMINAR Y INFORMA T IO N

Description

The ICS650-44 is a spread spectrum clock synthesizer

intended for video projector and digital TV applications.

It generates three copies of an EMI optimized 50 MHz

clock signal (EMI peak reduction of 7 to 14 dB on 3rd

through 19th harmonics) through the use of Spread

Spectrum techniques from a 25 MHz crystal or clock

input. The modulation rate is 50 kHz.

Features

• Packaged in 16-pin TSSOP (173 mil)

• Supply voltages: VDD = 3.3 V, VDDO = 2.5 V

• Peak-to-peak jitter: ±125 ps typ

• Output duty cycle 45/55% (worst case)

• 25 MHz crystal or reference clock input

• Zero (0) ppm frequency error on all output clocks

• Advanced, low-power CMOS process

• Industrial temperature range (-40 to +85°C)

• Available in Pb (lead) free package

Block Diagram

Crystal

OSC

GND

2

3

VDD

Control

Logic

50M

X2

25 MHz crystal

or clock input

External capacitors are

required with a crystal

input.

X1/CLKIN

50M

FS3:0

VDDO

PDTS

PLL with

Spread

Spectrum

50M

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