ICS501 datasheet(1/6 Pages) ICST

Teilenummer	ICS501

Bauteilbeschribung	LOCO PLL CLOCK MULTIPLIER

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Hersteller	ICST [Integrated Circuit Systems]

Direct Link	http://www.icst.com

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ICS501

MDS 501 K

1

Revision 071304

Integrat ed Circuit Systems ● 5 25 Race Stre et, San Jo se, CA 9 5126 ● te l (40 8 ) 2 97-12 01 ● www.ics t.co m

LOCO™ PLL CLOCK MULTIPLIER

Description

The ICS501 LOCOTM is 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).

The device also has an output enable pin which

tri-states the clock output when the OE pin is taken low.

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 or die

• Available in Pb (lead) free package

• ICS’ lowest cost PLL clock

• Zero ppm multiplication error

• Input crystal frequency of 5 - 27 MHz

• Input clock frequency of 2 - 50 MHz

• Output clock frequencies up to 160 MHz

• Extremely low jitter of 25 ps (one sigma)

• Compatible with all popular CPUs

• Duty cycle of 45/55 up to 160 MHz

• Nine selectable frequencies

• Operating voltage of 3.3V or 5.5V

• Tri-state output for board level testing

• 25mA drive capability at TTL levels

• Ideal for oscillator replacement

• Industrial temperature version available

• Advanced, low-power CMOS process

Block Diagram

CLK

PLL Clock

M ultiplier

Circuitry

and ROM

Crystal or

Clock input

GND

OE

VDD

Crystal

O scillator

S1:0

X1/ICLK

X2

O ptional crystal capacitors

2

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