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ICS9120M-47

Modem and Audio Clock Generator

Integrated Circuit Systems 

Integrated

Circuit

Systems, Inc.

ICS9120-47

Modem and Audio Clock Generator

General Description

The ICS9120-47 is a high performance frequency generator

designed to support digital compact disk drive systems. It

offers all clock frequencies required for the servo and decoder

sections of these devices. These frequencies are synthesized

from a single 16.9344 MHz on-chip oscillator.

High accuracy, low jitter PLLs meet the 150 ppm frequency

tolerance required by these systems. Fast output clock edge

rates minimize board induced jitter.

Unlike competitive devices, the ICS9120-47 operates over

the entire 3.0-5.5V range.

Features

• Generates the output clock frequencies required by

CD-ROM drive systems

• Single 16.9344 MHz crystal or system clock reference

• 100ps one sigma jitter

• Output rise/fall times less than 2.0ns (at 5V VDD)

• On-chip loop filter components

• 3.0V-5.5V supply range

• 150 ppm output frequency accuracy

• 8-pin, 150-mil SOIC

Applications

• Specifically designed to support CD-ROM drive

requirements of multimedia applications

Block Diagram

9120-47 Rev B 071696

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