ICS650-40A Ver la hoja de datos (PDF) - Integrated Circuit Systems

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ICS650-40A

ETHERNET SWITCH CLOCK SOURCE

Integrated Circuit Systems 

ICS650-40A

ETHERNET SWITCH CLOCK SOURCE

Description

The ICS650-40A is a clock chip designed for use as a

core clock in Ethernet Switch applications. Using ICS’

patented Phase-Locked Loop (PLL) techniques, the

device takes a 25 MHz crystal input and produces

various output clock frequencies as listed in Output

Select Table.

Features

• Packaged in 16-pin TSSOP

• Operating voltage of 3.3 V

• Low power consumption

• Input frequency of 25 MHz

• Low long-term jitter

• Separate supply voltage for clock outputs (2.5 / 3.3 V

clock outputs)

• OE control capability

Block Diagram

VDD

2

VDDOA VDDOB

S1:S0

2

Control

Logic

Phase Lock Loop

X1/ICLK

25 MHz

crystal or clock X2

Clock

Buffer/

Crystal

Oscillator

Optional tuning crystal

4

capacitors

OE

GND

CLKB

CLKA

CLKA

MDS 650-40A B

1

121004

Integrated Circuit Systems ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com

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