Product details


Function Equalizer Power consumption (mW) 280 Data rate (Max) (Gbps) 2.97 Control interface Pin Operating temperature range (C) -40 to 85 open-in-new Find other Serial digital interface (SDI) ICs

Package | Pins | Size

WQFN (RUM) 16 16 mm² 4 x 4 csBGA (NYA) 25 9 mm² 3 x 3 open-in-new Find other Serial digital interface (SDI) ICs


  • Compliant With ST 424, ST 292, ST 344, and ST
  • Supports DVB-ASI at 270 Mbps
  • Wide Range of Data Rates: 125 Mbps to 2.97
  • Equalizes up to 120 Meters of Belden 1694A at
    2.97 Gbps, up to 140 Meters of Belden 1694A at
    1.485 Gbps, or up to 400 Meters of Belden 1694A
    at 270 Mbps
  • Equalizes up to 120m of Belden 1694A at 2.97
    Gbps With 0.3 UI Maximum Output Jitter
  • Manual Bypass and Output Mute With a
    Programmable Threshold
  • Single-Ended or Differential Input
  • 50-Ω Differential Outputs (Internal 50-Ω Pullups)
  • Single 3.3-V Supply Operation
  • 280-mW Typical Power Consumption
  • 16-Pin WQFN or 25-Ball CS-BGA Package
  • Industrial Temperature Range: –40°C to +85°C
  • HBM ESD Rating: 8 kV
  • WQFN Version Footprint Compatible With the
    LMH0044, LMH0384, and LMH0074
  • Replaces the Semtech GS2974A or GS2974B
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The LMH0344 3-Gbps HD – SD SDI Adaptive Cable Equalizer is designed to equalize data transmitted over cable (or any media with similar dispersive loss characteristics). The equalizer operates over a wide range of data rates from 125 Mbps to 2.97 Gbps and supports ST 424, ST 292, ST 344, and ST 259.

The LMH0344 device implements DC restoration to correctly handle pathological data conditions. The equalizer may be driven in either a single-ended or differential configuration.

Additional features include separate carrier detect and output mute pins which may be tied together to mute the output when no signal is present. A programmable mute reference is provided to mute the output at a selectable level of signal degradation.

For applications using the 4:4:4:4 10 bits video format, the LMH0394 cable equalizer will provide better performance.

The device is available in two space-saving packages: a 4-mm × 4-mm 16-pin WQFN and even more space-efficient 3-mm × 3-mm 25-ball CS-BGA package.

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Technical documentation

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Type Title Date
* Data sheet LMH0344 3-Gbps HD - SD SDI Adaptive Cable Equalizer datasheet (Rev. O) Jul. 01, 2015
Application note 3G-SDI Cable Equalizer Compatibility Guide – TI / MACOM Sep. 13, 2017
Application note 3G-SDI Cable Equalizer Compatibility Guide – TI / Semtech Sep. 13, 2017
Selection guide Broadcast and Professional Video Interface Solutions (Rev. E) Apr. 05, 2017
Application note AN-1943 Understanding Serial Digital Video Bit Rates (Rev. A) Apr. 26, 2013
Application note AN-1972 Board Layout Challenges in Serial Digital Interface (Rev. C) Apr. 26, 2013
Application note AN-2145 Power Considerations for SDI Products (Rev. B) Apr. 26, 2013
Application note AN-2146 Power Design for SDI and Other Noise-Sensitive Devices (Rev. A) Apr. 26, 2013
Application note Replacing the CLC012 Adaptive Cable Equalizer with the LMH0074 (Rev. A) Apr. 26, 2013
Application note Replacing the CLC014 Adaptive Cable Equalizer with the LMH0074 (Rev. A) Apr. 26, 2013
Application note Triple Rate SDI IP FPGA Resource Utilization on SDXILEVK/AES-EXP-SDI-G Ref Dsgn (Rev. A) Apr. 26, 2013
User guide LMH0344 Evaluation Board User Guide, Rev. 1.1 Feb. 21, 2012
Application note High-Speed Board Layout Challenges in FPGA/SDI Sub-Systems Nov. 12, 2009
Application note 3G-SDI: 32 Loop Cascade Analysis Oct. 23, 2008
Application note DS25CP104 in 3G SDI Router Application Aug. 20, 2008
Design guide Broadcast Video Owner's Manual Nov. 17, 2006

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

document-generic User guide

The SD3GDAEVK is an evaluation board designed to demonstrate the performance and capabilities of the LMH0344 SDI cable equalizer, LMH0346 SDI reclocker, and LMH0302 SDI cable driver. The devices are configured on the board to function as a distribution amplifier. The LMH0344 cable equalizer (...)

  • Single input and dual output distribution amplifier
  • Option for monitoring recovered serial clock or second data output from reclocker
  • Automatic or manual data rate selection
  • Independent equalizer and reclocker bypass
  • Signal detection, lock detection, and data rate indication LEDs

Design tools & simulation

SNLM011.ZIP (9 KB) - IBIS Model
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
SPICE-based analog simulation program
TINA-TI TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
document-generic User guide
SNLC006.ZIP (93 KB)

CAD/CAE symbols

Package Pins Download
WQFN (RUM) 16 View options
csBGA (NYA) 25 View options

Ordering & quality

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  • MSL rating/Peak reflow
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  • Qualification summary
  • Ongoing reliability monitoring

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Support & training

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