Datasheet

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
VDD3336
VDD2535
SMB_CS34
SCK33
32
31
30
29
28
27
26
25
SDA
LOCK
RESET
RSVD
VDDPLL
LF_CP
LF_REF
VDD25
TXIN4-48 TXIN4+47 TXIN3-46 TXIN3+45
44 43 42 41 40 39 38 37
TXIN2- TXIN2+ TXIN1- TXIN1+ TXIN0- TXIN0+ TXCLKIN- TXCLKIN+N/C 24
N/C 23 N/C 22 N/C 21
20 19 18 17 16 15 14 13
TXOUT1-
TXOUT1+
VDD25
TXOUT0-
TXOUT0+
VDD25
VOD_CTRL
N/C
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 V
OD
control. The serializer output amplitude can be adjusted by connecting this pin to a pull-
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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