DVI/HDMI TMDS FR-4 and Cable Equalizer/Driver

Low-Cost Relief for DVI/HDMI Connection Woes

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The MAX3814 TMDS™ EQ/driver IC compensates for FR-4 and cable losses up to the DVI™/HDMI® transmit connector and provides a fully compliant DVI/HDMI TMDS output. The device can also be used in DVI/HDMI cable applications to extend reach and improve jitter margin of cable channels at the receive-side connector.

The on-chip TMDS drivers operate at a standard current level for implementing a typical DVI/HDMI nonback-terminated transmitter, as well as a 50% higher current mode for using a 200Ω back termination resistor (nonmatching) to achieve a 10dB return loss. Typical DVI/HDMI output drivers contribute to reflection problems between the connector and a typical high-impedance (open) DVI/HDMI Tx output. The selectable output current (LEVEL pin) gives the option of partial back termination (e.g., differentially connected 200Ω) to mitigate the reflection problem effectively while keeping common-mode offset to a minimum.

The 4-channel implementation treats all channels identically. To allow board layout flexibility for DVI and HDMI connectors, which have different channel order, the clock and data channels can be arbitrarily assigned.

The MAX3814 operates from a 3.3V power supply, standard for DVI/HDMI applications, and is packaged in a 5mm x 5mm x 0.1mm, 32-pin TQFP package.
MAX3814: Functional Diagram MAX3814: Functional Diagram Enlarge+

Key Features

  • Equalizes FR-4 Board Microstrip and Cable HF Losses Up to 15dB at 825MHz for Operation at 0.25Gbps to 1.65Gbps
  • Compatible with HDMI 1.3
  • Less Than 0.2UIP-P Residual Jitter at 1.65Gbps for 0 to 15dB Channel Loss at 825MHz
  • Input Terminations: 50Ω (Each Side to VCC) ±10%
  • Output of Driver is a Fully DVI/HDMI TMDS-Compatible Cable Driver
  • Output Amplitude: 1.05VP-P Differential
  • Enable Pin to Select Normal Operation or Power-Down Mode
  • LEVEL Pin to Select Output Current for Use With or Without Back Termination
  • 32-Pin TQFP for Four Channels; Any Channel Can Be Either a TMDS Data or Clock Signal
  • VCC = 3.3V; Signal Pins Have Absolute Max Ratings of 5.5V (for Fault Conditions)


  • Cable TMDS Equalizer
  • Docking Station TMDS Equalizer and Driver
  • Laptop PC TMDS Equalizer and Driver

See parametric specs for Digital Video Equalizers/Drivers (4)

Part NumberData Rate
Max. Reach @ Max. Data RateVSUPPLY
I/O TypeChannelsRx Eq. @ Max. Rate
mintyptypSee Notes
MAX3814 0
13m Cable
2m FR4
$2.53 @1k

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

See parametric specs for Equalizers (Cable and Circuit Board) (12)

Part NumberPackage/Pins
See Data Sheet

MAX3814EVKIT: MAX3814 Evaluation Kit
Product Reliability Reports: MAX3814.pdf 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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Related Resources

Type ID Title
Evaluation Board5534MAX3814EVKIT MAX3814 Evaluation Kit