Integrated

Circuit

Systems, Inc.

ICS9FG108

Advance Information

0823—04/02/04

Pin Configuration

Recommended Application:

Frequency Timing Generator for Differential CPU, PCI-Express

& SATA clocks

Features:

•

Generates common frequencies from 14.318 MHz or 25

MHz

•

Crystal or reference input

•

8 - 0.7V current-mode differential output pairs

•

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 < 85 ps

•

Output to output skew < 85 ps

•

+/-300 ppm frequency accuracy on output clocks

48-pin SSOP & TSSOP

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

XIN/CLKIN

1

48 VDDA

X2

2

47 GNDA

VDD

3

46 IREF

GND

4

45 FS0

REFOUT

5

44 FS1

FS2

6

43 OE_0**

OE_7**

7

42 DIF_0

DIF_7

8

41 DIF_0#

DIF_7#

9

40 VDD

VDD 10

39 DIF_1

DIF_6 11

38 DIF_1#

DIF_6# 12

37 OE_1*

OE_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#

Note:

Pin names followed by '**' have 120 Kohm pull DOWN resistors

Pin names followed by an '*' have 120 Kohm pull UP resistors

ADVANCE INFORMATION documents contain information on products in the formative or design phase development. Characteristic data and other specifications are design goals.

Third party brands and names are the property of their respective owners