VDD33

1

N/C

2

GPIO0

3

GPIO1

4

5

6

7

8

9

10

11

12

DC_B

RS

VDD25

N/C

DE_EMPH0

DE_EMPH1

GPIO2

TXOUT1_EN

VDD33

36

VDD25

35

SMB_CS

34

SCK

33

32

31

30

29

28

27

26

25

SDA

LOCK

RESET

RSVD

VDDPLL

LF_CP

LF_REF

VDD25

49 DAP = GND

DS32ELX0421

DS32EL0421, DS32ELX0421

www.ti.com

SNLS282F – MAY 2008 – REVISED APRIL 2013

See Package Number RHS0048A

TOP VIEW

PIN DESCRIPTIONS

Pin Name

Pin Number

I/O, Type

Description

Power, Ground and Analog Reference

VDD33

1, 36

I, VDD

3.3V supply

VDD25

7, 15, 18, 25, I, VDD

2.5V supply

35

VDDPLL

28

I, VDD

3.3V supply

VOD_CTRL

14

Analog

down resistor. The value of the resistor determines the VOD. See CML LAUNCH AMPLITUDE

for more details.

LF_CP

27

Analog

Loop filter connection for PLL

LF_REF

26

Analog

Loop filter ground reference

Exposed Pad

49

GND

Exposed Pad must be connected to GND by 9 vias

CML I/O

TxOUT0+

16

O, CML

Inverting and non-inverting high speed CML differential outputs of the serializer. These outputs

TxOUT0-

17

are internally terminated.

TxOUT1+

19

O, CML

DS32ELX0421 ONLY. Redundancy output. Inverting and non-inverting high speed CML

TxOUT1-

20

differential outputs of the serializer. These outputs are internally terminated

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