DATASHEET

ZERO DELAY GLITCH-FREE CLOCK MULTIPLEXER

ICS581-01/02

IDT™ / ICS™ ZERO DELAY GLITCH-FREE CLOCK MULTIPLEXER

1

ICS581-01/02

REV L 051310

Description

The ICS581-01/02 are glitch free, Phase Locked Loop

(PLL) based clock multiplexers (mux) with zero delay from

input to output. They each have four low skew outputs

which can be configured as a single output, three outputs,

or four outputs. The ICS581-01 allows user control over the

mux switching, while the ICS581-02 has automatic

switching between the two clock inputs.

The ICS581-01 and -02 are members of IDT’s

ClockBlocksTM family of clock generation, synchronization,

and distribution devices. For a non-PLL based clock mux,

see the ICS580-01.

Features

• 16-pin TSSOP package

• RoHS compliant packaging

• No short pulses or glitches on output

• Operates from 6 to 200 MHz

• Low skew outputs

• User controlled (-01) or automatic, timed mux switch (-02)

• Ideal for systems with back-up or redundant clocks

• Zero delay (input to output)

• 50% output duty cycle allows duty cycle correction

• SpreadSmartTM technology works with spread spectrum

parts

• Industrial temperature of ICS581-02 available

Block Diagram

PLL

GND

1

0

INA

INB

CLK1

VDD

SELA

Output

Divide

2

S1:0

CLK2

CLK3

CLK4

OE1

FBIN

OE0

2

2

ICS581-01

PLL

GND

INA

INB

CLK1

VDD

Output

Divide

2

S1:0

CLK2

CLK3

CLK4

OE1

FBIN

OE0

2

2

1

0

Transition

Detector

1

0

/3

/48

DIV

IN

ICS581-02