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I²C 2-Wire Extender for DDC in DVI, HDMI, and VGA Interfaces

Extend DVI/HDMI Reach Beyond 30m

Product Details

Key Features

Simplified Block Diagram

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Key Features

  • DDC or I²C Cable Extension Up to 60 Meters at 100kbps for Both Clock and Data Channels
  • Single-Sided Solution Requires Only One MAX3816A at the Display Side
  • Compensates for Cable Capacitance, 0 to 3000pF Guaranteed (8x I²C Specification), or Beyond 5000pF Typical
  • Parallel and Serial Operating Modes
  • Prevents Ringing Due to Reflections by Terminating Transmission Line Impedance After Transitions
  • Use with MAX3815 TMDS® Equalizer to Form a Complete Digital Video Extension Solution
  • 3.0V to 5.5V Power Supply
  • Optional Voltage Translation Between 5V Cable DDC and 3.3V Display DDC Levels

Applications/Uses

  • DVI/HDMI Cable-Extender Modules and Active Cable Assemblies
  • Front-Projector DVI/HDMI Inputs
  • High-Definition Televisions, Displays, and Computer Monitors

Description

The MAX3816A DDC*/I²C extender automatically compensates for excess load capacitance of long DVI™, HDMI™, and VGA cables. A single MAX3816A placed at the display side of the link restores signal integrity bidirectionally for both DDC clock and data over 0 to 60 meters of cable.

The MAX3816A features compensation for cable capacitance with a guaranteed range up to 3000pF, typically beyond 5000pF. The MAX3816A detects state-change assertion by the logical "AND" of the source side and display side. It asserts the new state with a rail-to-rail slew-rate-limited driver capable of meeting I²C rise- and fall-time requirements under the full load of the cable. After assertion of the new state, a holdoff period of 2.5µs prevents a subsequent state change while the cable channel settles.

Under full load at 100kbps, the MAX3816A consumes 25mW, excluding pullup resistors. It is available in a 16-pin TSSOP package and operates from 0°C to +70°C.

Simplified Block Diagram

MAX3816A: Typical Application Circuit (Parallel Mode) MAX3816A: Typical Application Circuit (Parallel Mode) Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .