LMH0356_08 Datasheet, PDF (1/16 Pages) National Semiconductor (TI) – 3 Gbps HD/SD SDI Reclocker with 4:1 Input Mux and FR4 EQs

August 19, 2008
LMH0356
3 Gbps HD/SD SDI Reclocker with 4:1 Input Mux and FR4
EQs
General Description
The LMH0356 3 Gbps HD/SD SDI Reclocker with 4:1 Input
Mux and FR4 EQs retimes serial digital video data conforming
to the SMPTE 424M, SMPTE 292M, and SMPTE 259M (C)
standards. The LMH0356 operates at serial data rates of 270
Mbps, 1.483 Gbps, 1.485 Gbps, 2.967 Gbps, and 2.97 Gbps.
The LMH0356 supports DVB-ASI operation at 270 Mbps. The
LMH0356 includes an integrated 4:1 input multiplexer for se-
lecting one of four input data streams for retiming. In addition,
the four inputs of the LMH0356 each have an FR4 equalizer
capable of equalizing 0-30” of FR4 trace length.
The LMH0356 automatically detects the incoming data rate
and adjusts itself to retime the incoming data to suppress ac-
cumulated jitter. The LMH0356 recovers the serial data-rate
clock and optionally provides it as an output. The LMH0356
has two differential serial data outputs; the second output may
be selected as a low-jitter, data-rate clock output. Controls
and indicators are: serial clock or second serial data output
select, manual rate select input, SD/HD rate indicator output,
lock detect output, auto/manual data bypass, output mute,
and device enable. The serial data inputs, outputs, and serial
clock outputs are differential LVPECL compatible. The CML
serial data and serial clock outputs are suitable for driving
100Ω differentially terminated networks. The control logic in-
puts and outputs are LVCMOS compatible.
The LMH0356 is powered from a single 3.3V supply. Power
dissipation is typically 430 mW. The device is housed in a 48-
pin LLP (also known as QFN) package.
Features
■ ^{Supports SMPTE 424M, SMPTE 292M, and SMPTE}
259M (C) serial digital video standards
■ ^{Supports 270 Mbps, 1.483 Gbps, 1.485 Gbps, 2.967}
Gbps, and 2.97 Gbps serial data rate operation
■ ^{Supports DVB-ASI at 270 Mbps}
■ ^{Single 3.3V supply operation}
■ ^{430 mW typical power consumption}
■ ^{Integrated 4:1 multiplexed input}
■ ^{0-30” FR4 equalizer on each multiplexed input}
■ ^{Two differential, reclocked outputs}
■ ^{Choice of second reclocked output or recovered clock}
output
■ ^{Single 27 MHz external crystal or reference clock input}
■ ^{Manual rate select input}
■ ^{SD/HD operating rate indicator output}
■ ^{Lock Detect indicator output}
■ ^{Output mute function for data and clock}
■ ^{Auto/Manual reclocker bypass}
■ ^{Power saver mode with device power down control}
(10 mW typical power consumption in disabled state)
■ ^{Differential LVPECL compatible serial data inputs and}
outputs
■ ^{LVCMOS control inputs and indicator outputs}
■ ^{48-Pin LLP package}
■ ^{Industrial temperature range: -40°C to +85°C}
■ ^{Footprint compatible with the LMH0056 and LMH0036}
Applications
■ ^{SDTV/HDTV and 3 Gbps serial digital video interfaces for:}
— Digital video routers and switchers
— Digital video processing and editing equipment
— DVB-ASI equipment
— Video standards and format converters
2.97 Gbps Signal Before FR4
Equalization (0.6 UI Jitter)
2.97 Gbps Signal After FR4
Equalization (0.23 UI Jitter)
2.97 Gbps Signal After Reclocking
(0.06 UI Jitter)
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