1FEATURES
2• 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 DVBOperation
• Supports DVB-ASI at 270 Mbps
• Single 3.3V Supply Operation
• 370 mW Typical Power Consumption
• Two Differential, Reclocked Outputs
• Choice of Second Reclocked Output or Low-
Jitter, Differential, Data-Rate Clock Output
• Single 27 MHz External Crystal or Reference
Clock Input
• Manual or Automatic Rate Select Input
• SD/HD Operating Rate Indicator Output
• Lock Detect Indicator Output
• Output Mute Function for Data and Clock
• Auto/Manual Reclocker Bypass
• Differential LVPECL Compatible Serial Data
Inputs and Outputs
• LVCMOS Control Inputs and Indicator Outputs
• 20-Pin HTSSOP or 24-Pin WQFN Package
• Industrial Temperature Range: -40°C to +85°C
• Footprint Compatible With the LMH0046 and
LMH0026 (HTSSOP Package)

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

DESCRIPTION
The LMH0346 3 Gbps HD/SD SDI Reclocker retimes
serial digital video data conforming to the SMPTE
424M, SMPTE 292M, and SMPTE 259M (C)
standards. The LMH0346 operates at serial data
rates of 270 Mbps, 1.483 Gbps, 1.485 Gbps, 2.967
Gbps, and 2.97 Gbps. The LMH0346 supports DVBOperation
ASI operation at 270 Mbps.
The LMH0346 automatically detects the incoming
data rate and adjusts itself to retime the incoming
data to suppress accumulated jitter. The LMH0346
recovers the serial data-rate clock and optionally
provides it as an output. The LMH0346 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 and output mute. 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
inputs and outputs are LVCMOS compatible.
The LMH0346 is powered from a single 3.3V supply.
Power dissipation is typically 370 mW.
The device is available in two space-saving
packages: a 6.5 X 4.4 mm 20-pin HTSSOP and an
even more space–efficient 5 X 4 mm 24-pin WQFN
package.