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

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.

Applications

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

* 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