ICS650-07C

NETWORKING CLOCK SOURCE

CLOCK SYNTHESIZER

IDT™ / ICS™ NETWORKING CLOCK SOURCE

2

ICS650-07C

REV D 102709

Pin Assignment

Pin Descriptions

13

4

12

5

11

ACS1

8

9

10

VDD

CLKC2

CLKA2

CCS

CLKB2

DC

17

16

CLKB1

3

X1/ICLK

VDD

CLKA1

18

REFOUT

1

ACS0

X2

BCS0

20

BCS1

19

14

2

7

GND

CLKC1

OE

GND

15

6

20 pin (150 mil) SSOP

Pin

Name

Pin Type

Description

1

ACS0

Tri-level Input A clock select 0. Selects outputs on CLKA1 and CLKA2. See table below.

2

X2

XO

Crystal connection. Connect to a crystal or leave unconnected for clock input.

3

X1/ICLK

XI

Crystal connection. Connect to fundamental crystal or clock input.

4

VDD

Power

Connect to 3.3 V or 5 V. Must be same value as other VDD.

5

ACS1

Input

A clock select 1. Selects outputs on CLKA1 and CLKA2. Internal pull-up

resistor. See table below.

6

GND

Power

Connect to ground.

7

CLKC1

Output

Clock C output 1. Depends on setting of CCS per table below.

8

CLKC2

Output

Clock C output 2. Depends on setting of CCS per table below. Same as CLKC1.

9

CLKB2

Output

Clock B output 2. Depends on setting of BCS1, 0 per table below.

10

CLKB1

Output

Clock B output 1. Depends on setting of BCS1, 0 per table below.

11

CCS

Tri-level Input Clock C Select pin. Selects outputs on CLKC1 and CLKC2 per table below.

12

DC

—

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

13

CLKA2

Output

Clock A output 2. Depends on setting of ACS1, 0 per table below.

14

GND

Power

Connect to ground.

15

OE

Input

Output enable. Tri-states all outputs when low. Internal pull-up resistor.

16

VDD

Power

Connect to VDD. Must be same value as other VDD.

17

CLKA1

Output

Clock A output 1. Depends on setting of ACS1, 0 per table below.

18

REFOUT

Output

Buffered reference clock output. Same frequency as crystal or clock input.

19

BCS0

Tri-level Input B clock select 0. Selects outputs on CLKB1 and CLKB2. See table below.

20

BCS1

Input

B clock select 1. Selects outputs on CLKB1 and CLKB2. See table below.