Integrated

Circuit

Systems, Inc.

ICS9FG107

0863C—11/22/04

Pin Configuration

Recommended Application:

Frequency Timing Generator for Differential CPU, PCI Express

& SATA clocks

Features:

•

Generates common CPU/PCI Express frequencies from

14.318 MHz or 25 MHz

•

Crystal or reference input

•

7 - 0.7V current-mode differential output pairs

•

3 - 33MHz PCI outputs

•

1 - REFOUT

•

Supports Serial-ATA at 100 MHz

•

Two spread spectrum modes: 0 to -0.5 downspread and

+/-0.25% centerspread

•

Unused inputs may be disabled in either driven or Hi-Z

state for power management.

Key Specifications:

•

Output cycle-to-cycle jitter for DIF outputs < 50 ps (<85ps

@ 266 MHz)

•

Output to output skew for DIF outputs < 85 ps

•

+/-300 ppm frequency accuracy on output clocks

Programmable FTG for Differential CPU, PCI Express* & SATA Clocks

48-pin SSOP & TSSOP

XIN/CLKIN

1

48 VDDA

X2

2

47 GNDA

VDD

3

46 IREF

GND

4

45 *DWNSPRD#

*FS2/REFOUT

5

44 **FS1

GND

6

43 *OE_0

*FS0/PCICLK_F

7

42 DIF_0

PCICLK0

8

41 DIF_0#

PCICLK1

9

40 VDD

VDD 10

39 DIF_1

**OE_6 11

38 DIF_1#

DIF_6 12

37 **OE_1

DIF_6# 13

36 VDD

VDD 14

35 GND

GND 15

34 **OE_2

**OE_5 16

33 DIF_2

DIF_5 17

32 DIF_2#

DIF_5# 18

31 VDD

VDD 19

30 DIF_3

DIF_4 20

29 DIF_3#

DIF_4# 21

28 *OE_3

*OE_4 22

27 **SEL14M_25M#

SDATA 23

26 *SPREAD

SCLK 24

25 DIF_STOP#

Notes:

Pins preceeded by * have 120 Kohm pull DOWN resistors

Pins preceeded by ** have 120 Kohm pull UP resistors

Frequency Select Table

SEL14M_25M#

(FS3)

FS2FS1 FS0OUTPUT(MHz)

0

000

100.00

0

001

125.00

0

010

133.33

0

011

166.67

0

100

200.00

0

101

266.66

0

110

333.33

0

111

400.00

1

000

100.00

1

001

125.00

1

010

133.33

1

011

166.67

1

100

200.00

1

101

266.66

1

110

333.33

1

111

400.00

*Other names and brands may be claimed as the property of others.