MARCH 8, 2017

3

7-OUTPUT 1.5V PCIE GEN1-2-3 FANOUT BUFFER

9DBU0731 DATASHEET

Pin Descriptions

PIN #

PIN NAME

PIN TYPE

DESCRIPTION

1

vSADR_tri

LATCHED

IN

Tri-level latch to select SMBus Address. It has an internal 120kohm pull down resistor. See

SMBus Address Selection Table.

2vOE6#

IN

Active low input for enabling output 6. This pin has an internal 120kohm pull-down.

1 =disable outputs, 0 = enable outputs

3

DIF6

OUT

Differential true clock output.

4

DIF6#

OUT

Differential complementary clock output.

5

VDDR1.5

PWR

1.5V power for differential input clock (receiver). This VDD should be treated as an Analog

power rail and filtered appropriately.

6

CLK_IN

IN

True Input for differential reference clock.

7

CLK_IN#

IN

Complementary Input for differential reference clock.

8

GNDDIG

GND

Ground pin for digital circuitry.

9

SCLK_3.3

IN

Clock pin of SMBus circuitry, 3.3V tolerant.

10

SDATA_3.3

I/O

Data pin for SMBus circuitry, 3.3V tolerant.

11

VDDDIG1.5

PWR

1.5V digital power (dirty power)

12

VDDIO

PWR

Power supply for differential outputs

13

vOE0#

IN

Active low input for enabling output 0. This pin has an internal 120kohm pull-down.

1 =disable outputs, 0 = enable outputs

14

DIF0

OUT

Differential true clock output.

15

DIF0#

OUT

Differential complementary clock output.

16

VDD1.5

PWR

Power supply, nominally 1.5V

17

VDDIO

PWR

Power supply for differential outputs

18

DIF1

OUT

Differential true clock output.

19

DIF1#

OUT

Differential complementary clock output.

20

NC

N/A

No connection.

21

vOE1#

IN

Active low input for enabling output 1. This pin has an internal 120kohm pull-down.

1 =disable outputs, 0 = enable outputs

22

DIF2

OUT

Differential true clock output.

23

DIF2#

OUT

Differential complementary clock output.

24

vOE2#

IN

Active low input for enabling output 2. This pin has an internal 120kohm pull-down.

1 =disable outputs, 0 = enable outputs

25

VDDO1.5

PWR

Power supply for outputs, nominally 1.5V.

26

VDDIO

PWR

Power supply for differential outputs

27

DIF3

OUT

Differential true clock output.

28

DIF3#

OUT

Differential complementary clock output.

29

vOE3#

IN

Active low input for enabling output 3. This pin has an internal 120kohm pull-down.

1 =disable outputs, 0 = enable outputs

30

NC

N/A

No connection.

31

VDD1.5

PWR

Power supply, nominally 1.5V

32

VDDIO

PWR

Power supply for differential outputs

33

DIF4

OUT

Differential true clock output.

34

DIF4#

OUT

Differential complementary clock output.

35

vOE4#

IN

Active low input for enabling output 4. This pin has an internal 120kohm pull-down.

1 =disable outputs, 0 = enable outputs

36

DIF5

OUT

Differential true clock output.

37

DIF5#

OUT

Differential complementary clock output.

38

vOE5#

IN

Active low input for enabling output 5. This pin has an internal 120kohm pull-down.

1 =disable outputs, 0 = enable outputs

39

VDDIO

PWR

Power supply for differential outputs

40

^CKPWRGD_PD#

IN

Input notifies device to sample latched inputs and start up on first high assertion. Low enters

Power Down Mode, subsequent high assertions exit Power Down Mode. This pin has internal

120kohm pull-up resistor.

41

EPAD

GND

Connect paddle to ground.