DATASHEET

FIELD PROGRAMMABLE DUAL OUTPUT SS VERSACLOCK SYNTHESIZER

ICS252

IDT™ / ICS™ FIELD PROGRAMMABLE DUAL OUTPUT SS VERSACLOCK SYNTHESIZER 1

ICS252

REV E 082007

Description

The ICS252 is a low cost, dual-output, field programmable

clock synthesizer. The ICS252 can generate two output

frequencies from 314 kHz to 200 MHz using up to two

independently configurable PLLs. The outputs may employ

Spread Spectrum techniques to reduce system

electro-magnetic interference (EMI).

output, the ICS252 contains a One-Time Programmable

(OTP) ROM to allow field programmability. Programming

features include 4 selectable configuration registers.

The device employs Phase-Locked Loop (PLL) techniques

to run from a standard fundamental mode, inexpensive

crystal, or clock. It can replace multiple crystals and

oscillators, saving board space and cost.

The device also has a power-down feature that tri-states the

clock outputs and turns off the PLLs when the PDTS pin is

taken low.

The ICS252 is also available in factory programmed custom

versions for high-volume applications.

Features

free) compliant package

Block Diagram

Crystal

Oscillator

GND

VDD

PDTS

PLL2

Divide

Logic

and

Output

Enable

Control

SEL

CLK2

CLK1

OTP

ROM

with

PLL

Values

X2

Crystal

External capacitors

are required.

X1

PLL1