• Packaged in 16 pin narrow (150 mil) SOIC

• No short pulses or glitches on output

• Operates to 200 MHz

• Does not add jitter or phase noise to the clock

• User controlled or automatic switching

• Low skew outputs

• Clock detect feature

• Ideal for systems with backup or redundant clocks

• Selectable timeouts for clock detection

• Separate supply voltages allow power supply voltage

translation

• Operates to 2.5 V

ICS580-01

Glitch-Free Clock Multiplexer

MDS 580-01 A

1

Revision 030300

Printed 11/28/00

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

The ICS580-01 is a clock multiplexer (mux)

designed to switch between 2 clock sources with no

glitches or short pulses. The operation of the mux is

controlled by an input pin but the part can also be

configured to switch automatically if one of the

input clocks stops. The part also provides clock

detection by reporting when an input clock has

stopped.

For a clock mux with zero delay and smooth

switching, see either the ICS581-01 or ICS581-02.

Block Diagram

Description

Features

NO_INB

OE1

1

0

INA

INB

SELB

CLK1

CLK2

Transition

Detector

Transition

Detector

OE2

OE3

OE4

Timer

NO_INA

VDDC

VDDI

DIV