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ICS503

LOCO™ PLL CLOCK MULTIPLIER

Integrated Device Technology 

LOCO™ PLL CLOCK MULTIPLIER

DATASHEET

ICS503

Description

The ICS503 is a member of the LOCOTM family, the

most cost effective way to generate a high-quality, high

frequency clock output 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 160 MHz.

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

• Packaged as 8-pin SOIC (Pb-free) or die

• IDT’s lowest cost PLL clock

• Generates 16.9344 MHz for stereo codecs from the

14.31818 MHz motherboard clock.

• Can be cost effective in replacing a single

surface-mount crystal

• Can be driven by other 5xx series

• Input crystal frequency of 5 - 27 MHz

• Input clock frequency of 2 - 50 MHz

• Output clock frequencies up to 160 MHz

• Low jitter - 50 ps one sigma

• Duty cycle of 45/55 up to 160 MHz

• Operating voltages of 3.0 to 5.5V

• 25 mA drive capability at TTL levels

• Advanced, low power CMOS process

Block Diagram

VDD

CLK

S1, S0

2

PLL Clock

Multiplier

X1/ICLK

Circuitry and

Crystal or

Clock input

X2

Crystal

OScillator

ROM

Optional crystal

capacitors

GND

IDT™ / ICS™ LOCO™ PLL CLOCK MULTIPLIER

1

ICS503

REV D 051310

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