4

Integrated

Circuit

Systems, Inc.

ICS952623

0758A—02/06/07

ICS952623 follows Intel CK409 Yellow Cover specification. This clock synthesizer provides a single chip solution for next

generation P4 Intel processors and Intel chipsets. ICS952623 is driven with a 14.318MHz crystal. It generates CPU outputs up

to 200MHz. It also provides a tight ppm accuracy output for Serial ATA support.

General Description

Block Diagram

I REF

PLL2

Frequency

Dividers

Programmable

Spread

PLL1

Programmable

Frequency

Dividers

STOP

Logic

48MHz, USB, DOT

X1

X2

XTAL

SDATA

SCLK

CPU_STOP#

PCI_STOP#

Vtt_PWRGD#

PD#

FS_A

FS_B

Control

Logic

REF (1:0)

CPUCLKT (2:0)

CPUCLKC (2:0)

SRCCLKT0

SRCCLKC0

3V66(4:0)

PCICLK (6:0)

PCICLKF (2:0)

Power Groups

VDD

GND

3

6

Xtal, Ref

24

25

3V66 [0:3]

10,16

11,17

PCICLK outputs

36

39

SRCCLK outputs

55

54

Master clock, CPU Analog

34

33

48MHz, PLL

N/A

53

IREF

48, 42

45

CPUCLK clocks

Description

Pin Number