TI LMH0346SQ/NOPB

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

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 DVBASI 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 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.

The LMH0346 is powered from a single 3.3V supply. Power dissipation is typically 370 mW.

The LMH0346 3 Gbps HD/SD SDI Reclocker is used in many types of digital video signal processing equipment. Supported serial digital video standards are SMPTE 259M (C), SMPTE 292M, and SMPTE 424M. Corresponding serial data rates are 270 Mbps, 1.483 Gbps, 1.485 Gbps, 2.967 Gbps, and 2.97 Gbps. DVB-ASI data at 270 Mbps may also be retimed. The LMH0346 retimes the serial data stream to suppress accumulated jitter. It provides two low-jitter, differential, serial data outputs. The second output may be selected to output either serial data or a low-jitter serial data-rate clock. Controls and indicators are: serial clock or second serial data output select, manual rate select input, SD/HD rate output, lock detect output, auto/manual data bypass and output mute.

Serial data inputs are CML and LVPECL compatible. Serial data and clock outputs are differential CML and produce LVPEC

• 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
• 370 mW Typical Power Consumption
• Two Differential, Reclocked Outputs
• Choice of Second Reclocked Output or LowJitter, 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)

• SDTV/HDTV and 3 Gbps Serial Digital Video
• Digital Video Routers and Switchers
• Digital Video Processing and Editing Equipment
• DVB-ASI Equipment
• Video Standards and Format Converters