IDT®

Four Output Differential Frequency Generator for PCIe Gen3 and QPI

1681D—04/04/17

9FG430

Four Output Differential Frequency Generator for PCIe Gen3 and QPI

2

Pin Configuration

Power Groups

VDD

GND

34

9,21

10,20

28

27

IREF, Analog VDD, GND for PLL Core

Description

Pin Num ber

REFOUT, Digital Inputs

DIF Outputs

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

266.67

0

1

1

0

333.33

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

266.67

1

1

1

0

333.33

1

1

1

1

400.00

XIN/CLKIN

1

28 VDDA

X2

2

27 GNDA

VDD

3

26 IREF

GND

4

25 vFS0

REFOUT

5

24 vFS1

vFS2

6

23 DIF_0

DIF_3

7

22 DIF_0#

DIF_3#

8

21 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 vSPREAD

SCLK 14

15 DIF_STOP#

^ indicates internal 120K pull up

v indicates internal 120K pull down