LMH0356 3Gbps HD/SD SDI Reclocker with 4:1 Input Mux and FR4 EQs
PRELIMINARY
October 2007
LMH0356
3Gbps HD/SD SDI Reclocker with 4:1 Input Mux and FR4
EQs
General Description
The LMH0356 3Gbps 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鈥?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
100鈩?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 440 mW. The device is housed in a 48-
pin LLP package.
Features
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Supports SMPTE 424M, SMPTE 292M, and SMPTE
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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
440 mW typical power consumption
Integrated 4:1 multiplexed input
0-30鈥?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
Device power down control (10mW 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掳C to +85掳C
Footprint compatible with the LMH0056
Applications
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SDTV/HDTV and 3Gbps serial digital video interfaces for:
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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)
30016710
30016711
30016712
漏 2007 National Semiconductor Corporation
300167
www.national.com
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