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LMH1228 12G UHD-SDI Dual Cable Driver with Integrated Reclocker


Package | PIN: RTV | 32
Temp: I (-40 to 85)
Carrier: Cut Tape
Qty Price
1-9 $32.64
10-24 $30.27
25-99 $28.38
100+ $21.50


  • Supports ST-2082-1 (12G), ST-2081-1 (6G), ST-424 (3G), ST-292 (HD), and ST-259 (SD)
  • Compatible With DVB-ASI and AES10 (MADI)
  • Integrated Reclocker Locks to SMPTE Rates of 11.88 Gbps, 5.94 Gbps, 2.97 Gbps, 1.485 Gbps or Divide-by-1.001 Sub-Rates and 270 Mbps
  • Integrated Eye Opening Monitor (EOM)
  • Dual Differential Output Cable Drivers
  • On-Chip 75-Ω Termination and Return Loss Compensation Network
  • Adaptive PCB Input Equalizer
  • Reclocked 100-Ω Loop-Back Output
  • Automatic Slew Rate Control on 75-Ω Outputs
  • Automatic Pre-Emphasis and Output Amplitude on 75-Ω Outputs
  • Programmable De-Emphasis and Output Amplitude on 100-Ω Output
  • Polarity Inversion on 75-Ω and 100-Ω Outputs
  • Automatic Power Save in Absence of Input Signal
    • Power Consumption: 25 mW (Typical)
  • Power-Down Control Through ENABLE Pin
  • Single 2.5-V Supply
    • Power Consumption: 305 mW (Typical)
  • Programmable Through Pins, SPI, or SMBus Interface
  • –40°C to +85°C Operating Temperature Range
  • 5-mm × 5-mm, 32-pin WQFN Package

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Texas Instruments  LMH1228RTVT

LMH1228 device is a 12G UHD-SDI low power dual output cable driver with integratedreclocker. It supports SMPTE video rates up to 11.88 Gbps, enabling UHD video for 4K/8Kapplications. With a wide range clock-and-data recovery (CDR) circuit, the on-chip reclockerautomatically detects and locks to all SMPTE video rates up to 11.88 Gbps. The additional reclocked100-Ω driver output on the host-side can be used for monitoring or signal distributionpurposes.

The on-chip reclocker attenuates high-frequency jitter and fully regenerates the datausing a clean, low-jitter clock. The reclocker has a built-in loop filter and does not require anyinput reference clock. The LMH1228 also has an internal eye opening monitor and a programmable pinfor CDR lock indication, input signal detect, or hardware interrupts to support system diagnosticsand board bring-up.

The LMH1228 is powered from a single 2.5-V supply. It is offered in a small footprint 5mm × 5 mm 32-pin WQFN package. The LMH1228 is pin compatible with the LMH1208 (12G Dual CableDriver).