LMH0318 3G/HD/SD SDI Reclocker with Integrated Cable Driver | TI.com

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3G/HD/SD SDI Reclocker with Integrated Cable Driver


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More Information

For more information on the LMH0318 programming guide and IBIS-AMI models.  Request Now


The LMH0318 is a 3 Gbps HD/SD SDI Reclocker with Integrated Cable Driver designed to drive serial video data compatible to SMPTE-SDI and DVB-ASI standards. The clock and data recovery circuit eliminates accumulated jitter and detects the incoming data rate without requiring an external reference clock. The integrated driver with 75 ohm and 50 ohm outputs enables multiple media options such as coax and FR4 PCB.

The integrated 2-to-1 MUX on the input of the LMH0318 enables selection between two video sources, while the programmable equalizer compensates for the PC board loss to extend signal reach. With a wide range clockand- data recovery (CDR) circuit, the on-chip reclocker automatically detects and locks to serial data from 270 Mbps to 2.97 Gbps without the need for an external reference clock and loop filter component, thereby simplifying board design and lowering system cost. The reclocked serial data can be routed to either the 75 Ω or 50 Ω transmitter output, or both simultaneously (1-to-2 fanout mode). The output voltage swing is compatible to ST 424, 344, 292, and 259 standards.

A non-disruptive eye monitor allows for real-time measurement of serial data to simplify system startup or field tuning. The LMH0318 is pin compatible with the LMH1218, 12 Gbps Cable Driver with Integrated Reclocker.


  • Supports ST 424(3G), 292(HD), 259(SD), MADI, and
  • Locks to rates 2.97 Gbps, 1.485 Gbps, or Divided
    by 1.001 sub-rates, and DVB-ASI
  • Reference-free Operation with Fast Lock Time
    covering all Supported or Selected Data Rates
  • 75 Ω and 100 Ω Transmitter Outputs
  • Integrated 2:1 Mux Input, 1:2 Demux/Fanout
  • Automatic Slew Rate Based on Input Rate Detect
  • On-chip Eye Monitor
  • Low 300 mW Power Consumption With Automatic
    Power Down On Loss Of Input Signal
  • Programmable via SPI, Or SMBus Interface
  • Single 2.5 V Supply Operation
  • Small 4 mm × 4 mm 24-pin QFN Package
  • -40°C to +85°C Operating Temperature Range
  • Footprint compatible with LMH1218 for easy
    upgrade to 12G


Compare all products in Serial digital interface (SDI) Email Download to Excel
Part number Order Function Data rate (Max) (Gbps) Power consumption (mW) Control interface Package Group Package size: mm2:W x L (PKG) Operating temperature range (C)
LMH0318 Order now Cable driver
Reclocker with cable driver    
2.97     300     SMBus
WQFN | 24     24WQFN: 16 mm2: 4 x 4 (WQFN | 24)     -40 to 85    
LMH1218 Order now Cable driver
Cable driver with reclocker
11.88     300     SMBus
WQFN | 24     24WQFN: 16 mm2: 4 x 4 (WQFN | 24)     -40 to 85