LMH0303 Datasheet, PDF (5/14 Pages) National Semiconductor (TI) – 3 Gbps HD/SD SDI Cable Driver with Cable Detect

Pin Descriptions
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
Description
Serial data true input.
Serial data complement input.
Negative power supply (ground).
Bias resistor. Connect a 750Ω resistor to V_CC.
Reset input.
H = Normal operation.
L = Device reset. The device operates with default register settings. Forcing RSTI low also forces
RSTO low.
Output driver enable (with 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.
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).
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