ICS409 datasheet(1/5 Pages) ICST

Part #	ICS409

Description	PC PERIPHERAL CLOCK

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Manufacturer	ICST [Integrated Circuit Systems]

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ICS409

MDS 409 C

1

Revision 111005

Integrated Circuit Systems l 525 Race Street, San Jose, CA 95126 l tel (408) 297-1201 l

www.icst.com

PC PERIPHERAL CLOCK

Description

The ICS409 is a cost-effective clock synthesizer

developed to optimize component count for PC

peripheral applications. The device supports a

common, low cost 14.31818 MHz crystal using an

on-chip crystal oscillator. The device locks all output

frequencies to enhance system performance. By

supporting common PC peripheral interface

frequencies including dual 25 MHz and 40/80 MHz

frequencies the clock lowers chip count enhancing

system cost and reliability.

The ICS409 utilizes a low pin count 8-pin SOIC

package to optimize board space.

ICS is a leader in low jitter and power consumer

application clock sources. These devices are capable

of supporting CCD, video, audio, USB, CPU, and other

peripherals.

Features

• Pin compatible with FS6286-01

• Low operating voltage of 3.3V

• On-chip oscillator supports 14.31818 MHz crystal

• Fixed dual 25 MHz clocks for Ethernet

• 40/80 MHz selected on rising edge of OE/LAT pin

• Power consumption of 15 mA (typ)

• Duty cycle of 45 to 55%

• Packaged in 8-pin SOIC

• Available in Pb (lead) free package

Block Diagram

25M

Cr y s t a l

O s c illa t o r

X1

X2

14. 3 1818 M H z

F unda m e n t al

Cr y s t a l

PL L

25M

40/ 8 0 M

VD D

GN D

OE / L A T

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