VOIP Clock Source

MDS 651-03 A

2

Revision 112603

ICS651-03

Pin Assignment

Pin Descriptions

12

1

11

2

10

3

9

X1

4

GND

5

6

VDD

7

25M

8

GND

REF

VDD

VDD

VDD

VDD

80M

VDD

GND

16

15

14

13

48M

X2

16-pin (173 mil) TSSOP

PDTS

Pin

Number

Pin

Name

Pin

Type

Pin Description

1

X1

Input

Crystal connection. Connect to 27 MHz crystal input.

2

GND

Power

Connect to ground.

3

PDTS

Input

Powers down entire chip and tri-states outputs when low. Internal

pull-up resistor.

4

25M

Output

25 MHz clock output. Weak internal pull-down when tri-state.

5

GND

Power

Connect to ground.

6

VDD

Power

Connect to +3.3 V.

7

VDD

Power

Connect to +3.3 V.

8

48M

Output

48 MHz clock output. Weak internal pull down when tri-state.

9

80M

Output

80 MHz clock output. Weak internal pull down when tri-state.

10

GND

Power

Connect to ground.

11

VDD

Power

Connect to +3.3 V.

12

VDD

Power

Connect to +3.3 V.

13

VDD

Power

Connect to +3.3 V.

14

REF

Output

Reference 27 MHz output. Weak internal pull-down when tri-state.

15

VDD

Power

Connect to +3.3 V.

16

X2

Output

Crystal connection. Connect to 27 MHz crystal input.