1 Features
1• Supports SMPTE ST-424, ST-292, and ST-259
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 3.3-V Supply Operation
• 430-mW Typical Power Consumption
• Integrated 4:1 Multiplexed Input
• 0 to 30-inch 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 WQFN or 40-Pin WQFN Package
• Industrial Temperature Range: –40°C to 85°C
• 48-Pin WQFN Version Footprint-Compatible with
the LMH0056 and LMH0036

2 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

3 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 ST-424, ST-292, and
ST-259 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
selecting 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 to 30 inches
of FR4 trace length.
The LMH0356 automatically detects the incoming
data rate and adjusts itself to retime the incoming
data to suppress accumulated 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-Ω differentially terminated
networks. The control logic inputs and outputs are
LVCMOS compatible.