Pin Descriptions

Pin

Name

TQFP Pin

Number

I/O, Type

Description

DIFFERENTIAL INPUTS

IN0+

IN0−

13

14

I, LVDS

Channel 0 inverting and non-inverting differential inputs.

IN1+

IN1−

15

16

I, LVDS

Channel 1 inverting and non-inverting differential inputs.

IN2+

IN2−

19

20

I, LVDS

Channel 2 inverting and non-inverting differential inputs.

IN3+

IN3−

21

22

I, LVDS

Channel 3 inverting and non-inverting differential inputs.

DIFFERENTIAL OUTPUTS

OUT0+

OUT0−

48

47

O, LVDS

Channel 0 inverting and non-inverting differential outputs. (Note 1)

OUT1+

OUT1−

46

45

O, LVDS

Channel 1 inverting and non-inverting differential outputs. (Note 1)

OUT2+

OUT2−

42

41

O, LVDS

Channel 2 inverting and non-inverting differential outputs. (Note 1)

OUT3+

OUT3-

40

39

O, LVDS

Channel 3 inverting and non-inverting differential outputs. (Note 1)

DIGITAL CONTROL INTERFACE

PWDN

12

I, LVTTL

A logic low at PWDN activates the hardware power down mode.

PEM0

PEM1

1

2

I, LVTTL

Pre-emphasis Control Inputs (affects all Channels)

TDI

34

I, LVTTL

Test Data Input to support IEEE 1149.1 features

TDO

35

O, LVTTL

Test Data Output to support IEEE 1149.1 features

TMS

27

I, LVTTL

Test Mode Select to support IEEE 1149.1 features

TCK

26

I, LVTTL

Test Clock to support IEEE 1149.1 features

TRST

25

I, LVTTL

Test Reset to support IEEE 1149.1 features

POWER

V

DD

3, 4, 5, 7, 10, 11,

28, 29, 32, 33

I, Power

V

GND

8, 9, 17, 18, 23,

24, 37, 38, 43,

44

I, Power

Ground

N/C

6, 30, 31, 36

No Connect

Note 1: The LVDS outputs do not support a multidrop (BLVDS) environment. The LVDS output characteristics of the SCAN90004 device have been optimized for

point-to-point backplane and cable applications.

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