Integrated

Circuit

Systems, Inc.

ICS9FG104

0839D—06/02/05

Pin Configuration

Recommended Application:

Frequency Timing Generator for Differential CPU & SATA clocks

Features:

•

Generates common CPU frequencies from 14.318 MHz

or 25 MHz

•

Crystal or reference input

•

4 - 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.

•

M/N Programming

Key Specifications:

•

Output cycle-to-cycle jitter < 50 ps

•

Output to output skew < 35 ps

•

+/-300 ppm frequency accuracy on output clocks

28-pin SSOP/TSSOP

Frequency Select Table

SEL14M_25M#

(FS3)

FS2 FS1 FS0 OUTPUT(MHz)

0

0

0

0

100.00

0

0

0

1

125.00

0

0

1

0

133.33

0

0

1

1

166.67

0

1

0

0

200.00

0

1

0

1

266.00

0

1

1

0

333.00

0

1

1

1

400.00

1

0

0

0

100.00

1

0

0

1

125.00

1

0

1

0

133.33

1

0

1

1

166.67

1

1

0

0

200.00

1

1

0

1

266.00

1

1

1

0

333.00

1

1

1

1

400.00

XIN/CLKIN

1

28 VDDA

X2

2

27 GNDA

VDD

3

26 IREF

GND

4

25 FS0

REFOUT

5

24 FS1

FS2

6

23 DIF_0

DIF_3

722 DIF_0#

DIF_3#

821 VDD

VDD

9

20 GND

GND 10

19 DIF_1

DIF_2 11

18 DIF_1#

DIF_2# 12

17 SEL14M_25M#

SDATA 13

16 SPREAD

SCLK 14

15 DIF_STOP#