2.7Gbps Dual Mux/Buffer with Loopback

4

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Pin Description

PIN

NAME

FUNCTION

1, 12, 24,

30, 31, 37

GND

Supply Ground

2

SIA-

Serial Input A Negative, CML

3

SIA+

Serial Input A Positive, CML

4, 9, 14, 17,

20, 23, 27,

34, 38, 41,

44, 47

+3.3V Supply

5

LB1A

Line Out 1A Loopback Mode Select. TTL low selects loopback.

6

LB2A

Line Out 2A Loopback Mode Select. TTL low selects loopback.

7

LB1B

Line Out 1B Loopback Mode Select. TTL low selects loopback.

8

LB2B

Line Out 2B Loopback Mode Select. TTL low selects loopback.

10

SIB+

Serial Input B Positive, CML

11

SIB-

Serial Input B Negative, CML

13

SELB

Serial Output B Input Select, TTL

15

SOB+

Serial Output B Positive, CML

16

SOB-

Serial Output B Negative, CML

18

LO1B+

Line Out 1B Positive, CML

19

LO1B-

Line Out 1B Negative, CML

21

LO2B+

Line Out 2B Positive, CML

22

LO2B-

Line Out 2B Negative, CML

25

LI2B+

Line In 2B Positive, CML

26

LI2B-

Line In 2B Negative, CML

28

LI1B+

Line In 1B Positive, CML

29

LI1B-

Line In 1B Negative, CML

32

LI1A-

Line In 1A Negative, CML

33

LI1A+

Line In 1A Positive, CML

35

LI2A-

Line In 2A Negative, CML

36

LI2A+

Line In 2A Positive, CML

39

LO2A-

Line Out 2A Negative, CML

40

LO2A+

Line Out 2A Positive, CML

42

LO1A-

Line Out 1A Negative, CML

43

LO1A+

Line Out 1A Positive, CML

45

SOA-

Serial Output A Negative, CML

46

SOA+

Serial Output A Positive, CML

48

SELA

Serial Out A Input Select, TTL

EP

Exposed

Pad

Ground. Must be soldered to the circuit board for proper thermal and electrical performance (see

the Exposed-Pad (EP) Package section).