DATASHEET

LOCO™ PLL CLOCK MULTIPLIER

ICS512

IDT™ / ICS™ LOCO™ PLL CLOCK MULTIPLIER

1

ICS512

REV H 051310

Description

The ICS512 is the most cost effective way to generate

a high-quality, high frequency clock output and a

reference clock from a lower frequency crystal or clock

input. The name LOCO stands for Low Cost Oscillator,

as it is designed to replace crystal oscillators in most

electronic systems. Using Phase-Locked-Loop (PLL)

techniques, the device uses a standard fundamental

mode, inexpensive crystal to produce output clocks up

to 200 MHz. With a reference output, this chip plus an

inexpensive crystal can replace two oscillators

Stored in the chip’s ROM is the ability to generate nine

different multiplication factors, allowing one chip to

output many common frequencies (see table on page

2).

This product is intended for clock generation. It has low

output jitter (variation in the output period), but input to

output skew and jitter are not defined or guaranteed.

For applications which require defined input to output

skew, use the ICS570B.

Features

— changed multiplier table

— higher operating frequncies

Block Diagram

PLL Clock

Synthesis

and Control

Circuitry

Crystal or

Clock input

VDD

Crystal

Oscillator

S1, S0

X1/ICLK

X2

2

CLK

GND

Optional crystal

capacitors

REF