ICS557-01 datasheet(1/10 Pages) ICST

Part #	ICS557-01

Description	PCI-EXPRESS CLOCK SOURCE

PDF	10 Pages

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Manufacturer	ICST [Integrated Circuit Systems]

Direct Link	http://www.icst.com

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ICS557-01

MDS 557-01 F

1

Revision 011606

Integrat ed Circuit Systems ● 525 Race Stre et, San Jo se, CA 9 5126 ● te l (40 8 ) 2 97-12 01 ● www.ics t.co m

PCI-EXPRESS CLOCK SOURCE

Description

The ICS557-01 is a clock chip designed for use in

PCI-Express Cards as a clock source. It provides a pair

of differential outputs at 100 MHz in a small 8-pin SOIC

package.

Using ICS’ patented Phase-Locked Loop (PLL)

techniques, the device takes a 25 MHz crystal input

and produces HCSL (Host Clock Signal Level)

differential outputs at 100 MHz clock frequency. LVDS

signal levels can also be supported via an alternative

termination scheme.

Features

• Supports PCI-ExpressTM HCSL Outputs

0.7 V current mode differential pair

• Supports LVDS Output Levels

• Packaged in 8-pin SOIC

• Available in Pb (lead) free package

• Operating voltage of 3.3 V

• Low power consumption

• Input frequency of 25 MHz

• Short term jitter 100 ps (peak-to-peak)

• Output Enable via pin selection

• Industrial temperature range available

Block Diagram

Phase Lock

Loop

Clock

Buffer/

Crystal

Oscillator

VDD

GND

X2

25 MHz

crystal /clock

CLK

OE

CLK

R

R(IREF)

X1

Crystal Tuning Capacitors

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