SNLS249M – FEBRUARY 2007 – REVISED APRIL 2013
PIN DESCRIPTIONS
Pin Name
Pin Number
I/O
(1)
, Type
Description
HIGH SPEED DIFFERENTIAL I/O
C_IN
−
1
I, CML
Inverting and non-inverting TMDS Clock inputs to the equalizer. An on-chip 50
Ω
terminating
C_IN+
2
resistor connects C_IN+ to VDD and C_IN- to VDD.
D_IN0
−
4
I, CML
Inverting and non-inverting TMDS Data inputs to the equalizer. An on-chip 50
Ω
terminating
D_IN0+
5
resistor connects D_IN0+ to VDD and D_IN0- to VDD.
D_IN1
−
8
I, CML
Inverting and non-inverting TMDS Data inputs to the equalizer. An on-chip 50
Ω
terminating
D_IN1+
9
resistor connects D_IN1+ to VDD and D_IN1- to VDD.
D_IN2
−
11
I, CML
Inverting and non-inverting TMDS Data inputs to the equalizer. An on-chip 50
Ω
terminating
D_IN2+
12
resistor connects D_IN2+ to VDD and D_IN2- to VDD.
C_OUT-
36
O, CML
Inverting and non-inverting TMDS outputs from the equalizer. Open collector.
C_OUT+
35
D_OUT0
−
33
O, CML
Inverting and non-inverting TMDS outputs from the equalizer. Open collector.
32
D_OUT1–
29
O, CML
Inverting and non-inverting TMDS outputs from the equalizer. Open collector.
28
D_OUT2
−
26
O, CML
Inverting and non-inverting TMDS outputs from the equalizer. Open collector.
25
Equalization Control
BST_0
23
I, LVCMOS
BST_0, BST_1, and BST_2 select the equalizer boost level for EQ channels. BST_0, BST_1,
BST_1
14
and BST_2 are internally pulled Low. See
BST_2
37
Device Control
EN
44
I, LVCMOS
Enable Equalizer input. When held High, normal operation is selected. When held Low,
standby mode is selected. EN is internally pulled High. Signal is global to all Data and Clock
channels.
FEB
21
I, LVCMOS
Force External Boost. When held High, the equalizer boost setting is controlled by the
BST_[0:2] pins. When held Low, the equalizer boost level is controlled through the SMBus
(see
) control pins. FEB is internally pulled High.
SD
45
O, LVCMOS
Equalizer Clock Channel Signal Detect Output. Produces a High when signal is detected.
POWER
V
DD
3, 6, 7,
Power
V
DD
pins should be tied to the V
DD
plane through a low inductance path. A 0.1µF bypass
10, 13,
capacitor should be connected between each V
DD
pin to the GND planes.
15, 46
GND
22, 24,
GND
Ground reference. GND should be tied to a solid ground plane through a low impedance
27, 30,
path.
31, 34
Exposed Pad
DAP
GND
The exposed pad at the center of the package must be connected to the ground plane.
System Management Bus (SMBus) Interface Control Pins
SDA
18
IO, LVCMOS SMBus Data Input / Output. Internally pulled High to 3.3V with High-Z pull up.
SDC
17
I, LVCMOS
SMBus Clock Input. Internally pulled High to 3.3V with High-Z pull up.
CS
16
I, LVCMOS
SMBus Chip select. When held High, the equalizer SMBus register is enabled. When held
Low, the equalizer SMBus register is disabled. CS is internally pulled Low. CS is internally
gated with SDC.
Other
Reserv
19, 20, 38,
Reserved. Do not connect.
39, 40,41,
42, 43, 47,
48
(1)
Note: I = Input,O = Output, IO =Input/Output,
2
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