ICS502

LOCO™ PLL Clock Multiplier

MDS 502 D

1

Revision 111000

Integrated Circuit Systems, Inc. • 525 Race Street • San Jose •CA•95126•(408) 295-9800tel • www.icst.com

• Packaged as 8 pin SOIC or die

• ICS’ lowest cost PLL clock plus reference

• Zero ppm multiplication error

• Easy to cascade with 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

• Compatible with all popular CPUs

• Duty cycle of 45/55 up to 160 MHz

• Operating voltages of 3.0 to 5.5V

• Industrial temperature version available

• 25mA drive capability at TTL levels

• Advanced, low power CMOS process

The ICS502 LOCO™ is the most cost effective

way to generate a high quality, high frequency

clock output and a reference from a low 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

6 different multiplication factors, allowing one

chip to output many common frequencies (see

page 2).

Block Diagram

Description

Features

CLK

Crystal

Oscillator

VDD GND

PLL

Clock

Synthesis

and Control

Circuitry

Output

Buffer

crystal

or clock

REF

X2

X1/ICLK

Output

Buffer

S1, S0

2