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LMH0387SL Datasheet(PDF) 4 Page - Texas Instruments

Part # LMH0387SL
Description  LMH0387 3 Gbps HD/SD SDI Configurable I/O Adaptive Cable Equalizer / Cable Driver
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

LMH0387SL Datasheet(HTML) 4 Page - Texas Instruments

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LMH0387
SNLS315G – APRIL 2010 – REVISED APRIL 2013
www.ti.com
PIN DESCRIPTIONS
Pin
Name
I/O, Type
Description
1, 4-7, 9–16,
RSVD
N/A
Do not connect.
42, 46-48
2, 3, 43
VCCTX
Power
Positive power supply for transmitter (+3.3V).
8
BNC_IO
I/O, SDI
Serial digital interface input or output for connection to a BNC. Connect this pin to the
BNC via an AC coupling capacitor (nominally 4.7
μF).
17
TERMRX
I, SDI
Termination for unused receiver (equalizer) input. This network should consist of a 1.0
µF capacitor followed by a 220
Ω resistor to ground.
18
SPI_EN
I, LVCMOS
SPI register access enable (equalizer). This pin should always be high; it must be pulled
high while operating in the input mode and may optionally be pulled high while operating
in the output mode. This pin has an internal pulldown.
19, 24, 25, 31, VEE
Power
Negative power supply (ground).
32, 35, 37, 41
20, 21
AEC+, AEC-
I/O, Analog
AEC loop filter external capacitor for equalizer (1.0 µF connected between AEC+ and
AEC-).
22
CD
O, LVCMOS
Carrier detect for BNC_IO pin.
H = No input signal detected on BNC_IO pin.
L = Input signal detected on BNC_IO pin.
23
CDTHRESH
I, Analog
Carrier detect threshold input. Sets the threshold for CD. CDTHRESH may be either
unconnected or connected to ground for normal CD operation.
26
SS (SPI)
I, LVCMOS
SPI slave select. This pin has an internal pullup.
27, 28
SDO, SDO
O, LVDS
Serial data differential output from receiver (equalizer).
29
MISO (SPI)
O, LVCMOS
SPI Master Input / Slave Output. LMH0387 control data transmit.
30
VCCRX
Power
Positive power supply for receiver (+3.3V).
33, 34
SDI, SDI
I, SDI
Serial data differential input for transmitter (cable driver).
36
RREF
I, Analog
BNC_IO output driver level control. Connect a resistor (nominally 715
Ω) to VCC to set the
output voltage swing for the BNC_IO pin.
38
SCK (SPI)
I, LVCMOS
SPI serial clock input.
39
MOSI (SPI)
I, LVCMOS
SPI Master Output / Slave Input. LMH0387 control data receive.
40
TX_EN
I, LVCMOS
Transmitter output driver enable. TX_EN has an internal pullup.
H = BNC_IO output driver is enabled.
L = BNC_IO output driver is powered off.
To configure the LMH0387 as a receiver, the BNC_IO output driver must be disabled by
tying TX_EN low. To configure the LMH0387 as a transmitter, the output driver must be
enabled by tying TX_EN high and the receiver may be powered down using the sleep
mode setting via the SPI.
44
SD/HD
I, LVCMOS
BNC_IO output slew rate control. SD/HD has an internal pulldown.
H = BNC_IO output rise/fall time complies with SMPTE 259M (SD).
L = BNC_IO output rise/fall time complies with SMPTE 424M / 292M (3G/HD).
45
TERMTX
O, SDI
Termination for unused transmitter (cable driver) output. This network should consist of a
4.7 µF capacitor followed by a 75
Ω resistor to ground.
4
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Product Folder Links: LMH0387


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