2

ICS932S825

1276D—10/25/07

Pin Description

PIN #

PIN NAME

TYPE

DESCRIPTION

1

X1

IN

Crystal input, Nominally 14.318MHz.

2

X2

OUT

Crystal output, Nominally 14.318MHz

3

VDDREF_STB

PWR

Ref, XTAL power supply, nominal 3.3V standby power

4

REF0_RUN_2x

OUT

14.318MHz Free Running XTAL Output. This output runs as long as

standby VDD is applied to the part. Default drive is 2 loads.

5

FS1/REF1_2x

I/O

Frequency select latch input pin / 14.318 MHz reference clock. Default 2

load drive.

6

FS2/REF2_2x

I/O

Frequency select latch input pin / 14.318 MHz reference clock. Default 2

load drive.

7

GNDREF

PWR

Ground pin for the REF outputs.

8

VDD48

PWR

Power pin for the 48MHz output.3.3V

9

48MHz_0_2x

OUT

48MHz clock output. Default 2 load drive strength

10

48MHz_1_2x

OUT

48MHz clock output. Default 2 load drive strength

11

GND48

PWR

Ground pin for the 48MHz outputs

12

SCLK

IN

Clock pin of SMBus circuitry, 5V tolerant.

13

SDATA

I/O

Data pin for SMBus circuitry, 3.3V tolerant.

14

VDDPCI

PWR

Power supply for PCI clocks, nominal 3.3V

15

PCICLK0_2x

OUT

3.3V PCI clock output. Default 2 load drive strength.

16

PCICLK1_2x

OUT

3.3V PCI clock output. Default 2 load drive strength.

17

GNDPCI

PWR

Ground pin for the PCI outputs

18

CLKPWRGD/PD#

IN

This 3.3V LVTTL input is a level sensitive strobe used to determine when

latch inputs are valid and are ready to be sampled. This is an active high

input. / Asynchronous active low input pin used to power down the device

into a low power state.

19

GND

PWR

Ground pin.

20

VDDA

PWR

3.3V power for the PLL core.

21

GNDA

PWR

Ground pin for the PLL core.

22

GND

PWR

Ground pin.

23

PCIeT_L0

OUT

True clock of 0.8V differential push-pull PCI_Express pair (no 50ohm

resistor to GND needed)

24

PCIeC_L0

OUT

Complement clock of 0.8V differential push-pull PCI_Express pair. (no

50ohm resistor to GND needed)

25

PCIeT_L1

OUT

True clock of 0.8V differential push-pull PCI_Express pair (no 50ohm

resistor to GND needed)

26

PCIeC_L1

OUT

Complement clock of 0.8V differential push-pull PCI_Express pair. (no

50ohm resistor to GND needed)

27

GND

PWR

Ground pin.

28

VDDPCIe

PWR

Power supply for PCI Express clocks, nominal 3.3V

29

PCIeT_L2

OUT

True clock of 0.8V differential push-pull PCI_Express pair (no 50ohm

resistor to GND needed)

30

PCIeC_L2

OUT

Complement clock of 0.8V differential push-pull PCI_Express pair. (no

50ohm resistor to GND needed)

31

PCIeT_L3

OUT

True clock of 0.8V differential push-pull PCI_Express pair (no 50ohm

resistor to GND needed)

32

PCIeC_L3

OUT

Complement clock of 0.8V differential push-pull PCI_Express pair. (no

50ohm resistor to GND needed)