DATASHEET

2:1 MULTIPLEXER CHIP FOR PCI-EXPRESS GEN1

ICS557-08

IDT® 2:1 MULTIPLEXER CHIP FOR PCI-EXPRESS GEN1

1

ICS557-08

REV L 112111

Description

The ICS557-08 is a 2:1 multiplexer chip that allows the user

to select one of the two HCSL (Host Clock Signal Level)

input pairs and fans out to one pair of differential HCSL or

LVDS outputs. This chip is suited especially for

PCI-Express applications, where there is a need to select

the PCI-Express clock either locally from the PCI-E card or

from the motherboard.

Features

• Packaged in 16-pin TSSOP

• Pb (lead) free package

• Operating voltage of 3.3 V

• Low power consumption

• Input clock frequency of up to 200 MHz

• For PCIe Gen2/3 applications, see the 5V41068A

Block Diagram

VDD

Rr (IREF)

CLK

CLK

SEL

GND

IN1

IN1

IN2

IN2

MUX

2 to 1

OE

3

3

PD