ICS932S805C

K8 Clock Chip for Serverworks HT2100 Servers

2

IDT®

K8 Clock Chip for Serverworks HT2100 Servers

1131D – 05/04/10

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

PWR

Ref, XTAL power supply, nominal 3.3V

4

FS0/REF0

I/O

Frequency select latch input pin / 14.318 MHz reference clock.

5

FS1/REF1

I/O

Frequency select latch input pin / 14.318 MHz reference clock.

6

FS2/REF2

I/O

Frequency select latch input pin / 14.318 MHz reference clock.

7

GNDREF

PWR

Ground pin for the REF outputs.

8

VDD48

PWR

Power pin for the 48MHz output.3.3V

9

48MHz_0

OUT

48MHz clock output.

10

48MHz_1

OUT

48MHz clock output.

11

48MHz_2

OUT

48MHz clock output.

12

GND48

PWR

Ground pin for the 48MHz outputs

13

SCLK

IN

Clock pin of SMBus circuitry, 5V tolerant.

14

SDATA

I/O

Data pin for SMBus circuitry, 3.3V tolerant.

15

VDDPCI

PWR

Power supply for PCI clocks, nominal 3.3V

16

**FS3/PCICLK0

I/O

Frequency select latch input pin / 3.3V PCI clock output.

17

PCICLK1

OUT

PCI clock output.

18

GNDPCI

PWR

Ground pin for the PCI outputs

19

PD#

IN

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

internal clocks are disabled and the VCO and the crystal are stopped.

20

GND

PWR

Ground pin.

21

VDDA

PWR

3.3V power for the PLL core.

22

GNDA

PWR

Ground pin for the PLL core.

23

IREF

OUT

This pin establishes the reference current for the differential current-mode

output pairs. This pin requires a fixed precision resistor tied to ground in

order to establish the appropriate current. 475 ohms is the standard value.

24

VDDA

PWR

3.3V power for the PLL core.

25

SRCCLKT0

OUT

True clock of differential SRC clock pair.

26

SRCCLKC0

OUT

Complement clock of differential SRC clock pair.

27

SRCCLKT1

OUT

True clock of differential SRC clock pair.

28

SRCCLKC1

OUT

Complement clock of differential push-pull SRC clock pair.

29

SRCCLKT2

OUT

True clock of differential SRC clock pair.

30

SRCCLKC2

OUT

Complement clock of differential SRC clock pair.

31

VDDSRC

PWR

Supply for SRC clocks, 3.3V nominal

32

GNDSRC

PWR

Ground pin for the SRC outputs