TI LMH0376

April 11, 2012
LMH0376
3 Gbps HD/SD SDI Low Power Reclocker with Integrated
Eye Monitor and 4:1 Input Mux
General Description
Features
The LMH0376 3 Gbps HD/SD SDI Low Power Reclocker with
Integrated Eye Monitor and 4:1 Input Mux retimes serial digital
video data conforming to the SMPTE 424M, SMPTE 292M,
and SMPTE 259M-C standards. The reclocker operates at
serial data rates of 125 Mbps, 270 Mbps, 1.4835 Gbps, 1.485
Gbps, 2.967 Gbps, and 2.97 Gbps.
The LMH0376 automatically detects the incoming data rate
and retimes the data to suppress accumulated jitter. The reclocker recovers the serial data-rate clock and optionally
provides it as an output.
The LMH0376 includes an integrated 4:1 input multiplexer for
selecting one of four input data streams for retiming. Each of
the four inputs has an FR4 equalizer capable of equalizing
0-60” of FR4 trace length. Each input also includes independent signal detection with a programmable threshold.
The LMH0376 has two differential serial data outputs and offers flexibility in selecting the output signals between the
reclocked data, recovered clock, bypassed data, or the bypassed data from an independently selected input channel.
The output drivers offer programmable de-emphasis for up to
40” of FR4 trace losses, in addition to programmable common
mode voltage and swing for flexible interfacing.
The LMH0376 provides a 64 x 64 point eye monitor for analyzing the eye quality of the incoming signal.
The LMH0376 supports two modes of operation. In pin mode,
the LMH0376 operates with control pins to set its operating
state, and is footprint compatible with the LMH0356 reclocker.
In SPI mode, an optional SPI serial interface can be used to
configure and monitor multiple LMH0376 devices in a daisychain configuration.
■ SMPTE 424M, SMPTE 292M, and SMPTE 259M-C
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compliant
Supports 125 Mbps, 270 Mbps, 1.4835 Gbps, 1.485 Gbps,
2.967 Gbps, and 2.97 Gbps serial data rate operation
Supports DVB-ASI at 270 Mbps and MADI at 125 Mbps
100 mW typical power consumption (145 mW with both
output drivers enabled)
Integrated 4:1 multiplexed input with 0-60” FR4 equalizer
and independent signal detect on each channel
Two differential, reclocked outputs with option of
recovered clock
Output de-emphasis to compensate for up to 40” of FR4
trace losses
64 x 64 point eye opening monitor
27 MHz external reference or referenceless operation
Optional SPI register access
Internally terminated 100Ω inputs with rail-to-rail input
common mode voltage
Internally terminated 100Ω LVDS outputs with
programmable output common mode voltage and swing
Single 2.5V supply operation
Power save mode with device power down control
48-pin LLP package (7 x 7 mm)
Industrial temperature range: -40°C to +85°C
Footprint compatible with the LMH0356 in pin mode
Applications
■ SMPTE 424M, SMPTE 292M, and SMPTE 259M serial
digital interfaces
■ Broadcast video routers, switchers, and distribution
amplifiers
Typical Application
30149001
© 2012 Texas Instruments Incorporated
301490 SNAS583
www.ti.com
LMH0376 3 Gbps HD/SD SDI Low Power Reclocker with Integrated Eye Monitor and 4:1 Input
Mux
PRELIMINARY
LMH0376
Physical Dimensions inches (millimeters) unless otherwise noted
48-Pin LLP
Order Number LMH0376SQ
Package Number SQA48A
www.ti.com
2
LMH0376
Notes
3
www.ti.com
LMH0376 3 Gbps HD/SD SDI Low Power Reclocker with Integrated Eye Monitor and 4:1 Input
Mux
Notes
www.ti.com
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