Integrated

Circuit

Systems, Inc.

ICS952621

0756A—09/10/04

Pin Configuration

Recommended Application:

CK409 48-pin part

Output Features:

•

2 - 0.7V current-mode differential CPU pairs

•

1 - 0.7V current-mode differential CPU pairs for ITP

•

1 - 0.7V current-mode differential SRC pair

•

9 - PCI (33MHz), including 3 free running PCI

•

1 - USB, 48MHz

•

1 - DOT, 48MHz

•

2 - REF, 14.318MHz

•

3 - 3V66, 66.66MHz

•

1 - 3V66/VCH, selectable 48MHz or 66MHz

Key Specifications:

•

CPU/SRC outputs cycle-cycle jitter < 125ps

•

3V66 outputs cycle-cycle jitter < 250ps

•

PCI outputs cycle-cycle jitter < 250ps

•

CPU outputs skew: < 100ps

•

+/- 300ppm frequency accuracy on CPU & SRC clocks

Programmable Timing Control Hub™ for Next Gen P4™ processor

Functionality

Features/Benefits:

•

Supports tight ppm accuracy clocks for Serial-ATA

•

Supports spread spectrum modulation, 0 to -0.5%

down spread and +/- 0.25% center spread

•

Supports CPU clks up to 400MHz in test mode

•

Uses external 14.318MHz crystal

•

Supports undriven differential CPU, SRC pair in PD#

and CPU_STOP# for power management.

48-pin SSOP

FS2

B6b5 FS_A FS_B

CPU

MHz

SRC

MHz

3V66

MHz

PCI

MHz

REF

MHz

USB/

DOT

MHz

0

0

100.00 100/200 66.66 33.33 14.318 48.00

0

1

200.00 100/200 66.66 33.33 14.318 48.00

1

0

133.33 100/200 66.66 33.33 14.318 48.00

1

1

166.66 100/200 66.66 33.33 14.318 48.00

0

0

200.00 100/200 66.66 33.33 14.318 48.00

0

1

400.00 100/200 66.66 33.33 14.318 48.00

1

0

266.66 100/200 66.66 33.33 14.318 48.00

1

1

333.33 100/200 66.66 33.33 14.318 48.00

0

1

FS_A/REF1

1

48 VDDA

FS_B/REF0

2

47 GND

VDDREF

3

46 IREF

X1

4

45 CPUCLKT_ITP

X2

5

44 CPUCLKC_ITP

GND

6

43 GND

PCICLK_F0

7

42 CPUCLKT1

PCICLK_F1

8

41 CPUCLKC1

PCICLK_F2

9

40 VDDCPU

VDDPCI 10

39 CPUCLKT0

GND 11

38 CPUCLKC0

PCICLK0 12

37 GND

PCICLK1 13

36 SRCCLKT

PCICLK2 14

35 SRCCLKC

PCICLK3 15

34 VDD

VDDPCI 16

33 VttPWR_GD#

GND 17

32 SDATA

PCICLK4 18

31 SCLK

PCICLK5 19

30 3V66_0

PD# 20

29 3V66_1

48MHz_DOT 21

28 GND

48MHz_USB 22

27 VDD3V66

GND 23

26 3V66_2

VDD48 24

25 3V66_3/VCH

**120K

Ω pull-down