LMH0303_13 Datasheet, PDF (2/19 Pages) Texas Instruments – 3 Gbps HD/SD SDI Cable Driver with Cable Detect

LMH0303
SNLS285G – APRIL 2008 – REVISED APRIL 2013
Connection Diagram
16 15 14 13
SDI 1
SDI 2
V_EE 3
R_REF 4
LMH0303
(top view)
56 7 8
12 SDO
11 SDO
10 SD/HD
9 V_CC
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The exposed die attach pad is a negative electrical terminal for this device. It should be connected to the negative
power supply voltage.
Figure 1. 16-Pin WQFN
Package Number RUM
Pin
Name
1
SDI
2
SDI
3
V_EE
4
R_REF
5
RSTI
6
ENABLE
7
SDA
8
SCL
9
V_CC
10
SD/HD
11
SDO
12
SDO
13
FAULT
14
NC
15
NC
16
RSTO
DAP
V_EE
PIN DESCRIPTIONS
Description
Serial data true input.
Serial data complement input.
Negative power supply (ground).
Bias resistor. Connect a 750Ω resistor to V_CC.
Reset input. RSTI has an internal pullup.
H = Normal operation.
L = Device reset. The device operates with default register settings. Forcing RSTI low also forces
RSTO low.
Output driver enable. ENABLE has an internal pullup.
H = Normal operation.
L = Output driver powered off.
SMBus bidirectional data pin. When functioning as an output, it is open drain. This pin requires an
external pullup.
SMBus clock input. SCL is input only. This pin requires an external pullup.
Positive power supply (+3.3V).
Output slew rate control. SD/HD has an internal pulldown.
H = Output rise/fall time complies with SMPTE 259M.
L = Output rise/fall time complies with SMPTE 424M / 292M.
Serial data complement output.
Serial data true output.
Fault open drain output flag. Requires external pullup resistor and may be wire ORed with multiple
cable drivers.
H = Normal operation.
L = Loss of signal or termination fault for any output.
No connect. Not bonded internally.
No connect. Not bonded internally.
Reset output. RSTO is automatically set to 1 when register 0 is written. It can be reset back to zero by
forcing RSTI to zero to reset the device. Used to daisy chain multiple cable drivers on the same
SMBus.
Connect exposed DAP to negative power supply (ground).
2
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