ICS548A-03

LOW SKEW CLOCK INVERTER AND DIVIDER

CLOCK DIVIDER

IDT™ / ICS™ LOW SKEW CLOCK INVERTER AND DIVIDER

3

ICS548A-03

REV C 063006

Pin Descriptions

External Components

The ICS548A-03 requires a minimum number of external components for proper operation. Decoupling capacitors

of 0.01µF should be connected between pins 3 and 5, as close to the device as possible. Connect pin 2 directly to

pin 3, and pin 6 directly to pin 5. A series termination resistor of 33

Ω should be used on all clock outputs, as close

to the device as possible. Leave any unused clock outputs floating. There are no pull-up resistors on the input pins,

and they may be connected directly to VDD or ground.

Pin

Number

Pin

Name

Pin

Type

Pin Description

1

ICLK

Input

Clock input.

2

VDD

Power

Connect to 3.3 V.

3

VDD

Power

Connect to 3.3 V.

4

S3

Input

Clock Select 3. See table on page 2.

5

GND

Power

Connect to ground.

6

GND

Power

Connect to ground.

7

S2

Input

Clock Select 2. See table on page 2.

8

S0

Input

Clock Select 0. See table on page 2.

9

S1

Input

Clock Select 1. See table on page 2.

10

OE

Input

Output Enable. Tri-states all clock outputs when low.

11

CLK/2

Output

Clock output divided by 2. See table on page 2.

12

CLK

Output

Clock output. See table on page 2.

13

CLK

Output

Inverted clock output. See table on page 2.

14

DC

—

Don’t connect. Do not connect anything to this pin.

15

DC

—

Don’t connect. Do not connect anything to this pin.

16

DC

—

Don’t connect. Do not connect anything to this pin.