MDS 557-01 F

2

Revision 011606

ICS557-01

Pin Assignment

Pin Descriptions

1

2

3

X1

4

X2

VDD

IRE F

GND

CL K

CL K

8

7

6

5

OE

8 Pi n ( 1 5 0 mi l ) S OI C

Pin

Number

Pin

Name

Pin

Type

Pin Description

1

OE

Input

Output Enable signal

(H = outputs are enabled, L = outputs are disabled/tristated).

Internal pull-up resistor.

2

X1

Input

Crystal or clock input. Connect to a 25 MHz crystal or single ended clock.

3

X2

XO

Crystal Connection. Connect to a parallel mode crystal.

Leave floating if clock input.

4

GND

Power

Connect to ground.

5

IREF

Output

A 475

Ω precision resistor connected between this pin and ground

establishes the external reference current.

6CLK

Output

HCSL differential complementary clock output.

7

CLK

Output

HCSL differential clock output.

8

VDD

Power

Connect to +3.3 V.