2

ICS169C-40

Pin Descriptions

PIN NUMBER

PIN NAME

TYPE

DESCRIPTION

1, 9

VDD

PWR

Power supply

2

REF

OUT

Buffered output reference. 3.3V

3, 5, 18, 26, 32

GND

PWR

Digital Ground.

4

N/C

-

Not connected.

6, 7, 8, 10, 11, 12

PCI (1:6)

OUT

13, 19, 20

FS (0:2)

IN

Frequency select inputs, these inputs have internal pull-ups.

14

PD#

IN

Input for tristate. If PD# = 0, then all outputs are tristated and

the device is in shutdown mode (VCO’s off, crystal oscillator

is off and all logic is reset) When PD# = 1, the device is in

normal operating mode. Has internal pull-up

15

AGND

PWR

Analog Ground

16

N/C

-

Not connected

17

AVDD

PWR

Analog Power Supply

21

VDDL1

PWR

3.3/2.5V Power Supply for CPU (1:4)

22, 23, 24, 25, 27, 28, 29, 30

CPU (1:8)

OUT

Clock outputs.

31

VDDL2

PWR

3.3/2.5V Power Supply for CPU (5:8)

33

X2

OUT

Reference oscillator

34

X1

IN

Reference oscillator