PTN3366 is a low power, high-speed level shifter device which converts four lanes of low-swingAC-coupled differential input signals to DVI v1.0 and HDMI v1.4b compliant open-draincurrent-steering differential output signals, up to 3 Gbit/s per lane to support 36-bitdeep color mode, 4K × 2K video format or 3D video data transport. Each of these lanesprovides a level-shifting differential active buffer, with built-in Equalization, totranslate from low-swing AC-coupled differential signaling on the source side, toTMDS-type DC-coupled differential current-mode signaling terminated into 50 Ω to 3.3 Von the sink side. Additionally, the PTN3366 provides a single-ended active buffer forvoltage translation of the HPD signal from 5 V on the sink side to 3.3 V on the sourceside and provides a channel with active buffering and level shifting of the DDC channel(consisting of a clock and a data line) between 3.3 V source-side and 5 V sink-side. TheDDC channel is implemented using active I2C-bus buffer technology providingredriving and level shifting as well as disablement (isolation between source and sink)of the clock and data lines.

The low-swing AC-coupled differential input signals to the PTN3366 typically come from adisplay source with multi-mode I/O, which supports multiple display standards, forexample, DisplayPort, HDMI and DVI. While the input differential signals are configuredto carry DVI or HDMI coded data, they do not comply with the electrical requirements ofthe DVI v1.0 or HDMI v1.4b specification. By using PTN3366, chip set vendors are able toimplement such reconfigurable I/Os on multi-mode display source devices, allowing thesupport of multiple display standards while keeping the number of chip set I/O pinslow.

The PTN3366 main high-speed differential lanes feature low-swing self-biasingdifferential inputs which are compliant to the electrical specifications of DisplayPortStandard v1.2a and/or PCI Express Standard v1.1, and open-drain current-steeringdifferential outputs compliant to DVI v1.0 and HDMI v1.4b electrical specifications. TheI2C-bus channel actively buffers as well as level-translates the DDCsignals. The PTN3366 supports standby mode in order to minimize current consumption whenHot Plug Detect signal HPD_SINK is LOW.

PTN3366 is powered from a single 3.3 V power supply consuming a small amount of power (72mW typical) and is offered in a 32-terminal HVQFN32 package.

• High-speed TMDS level shifting
  • Converts four lanes of low-swing AC-coupled differential inputsignals to DVI v1.0 and HDMI v1.4b compliant open-draincurrent-steering differential output signals
  • TMDS level shifting operation up to 3 Gbit/s per lane (300 MHz TMDSclock) supporting 4K × 2K 3 Gbit/s and 3D video formats
  • Programmable receive equalization
  • Integrated 50 Ω termination resistors for self-biasing differentialinputs
  • Back-current safe outputs to disallow current when device power isoff and monitor is on
  • Disable feature to turn off TMDS inputs and outputs and to enterlow-power condition
  • Selectable differential output termination on TMDS channels
• DDC level shifting
  • Integrated DDC buffering and level shifting (3.3 V source to 5 V sinkside and vice versa)
  • Rise time accelerator on connector side DDC ports
  • Up to 400 kHz I2C-bus clock frequency
  • Back-power safe sink-side terminals to disallow backdrive currentwhen power is off or when DDC is not enabled
• HPD level shifting
  • HPD non-inverting level shift from 0 V on the sink side to 0 V on thesource side, or from 5 V on the sink side to 3.3 V on the sourceside
  • Integrated 200 kΩ pull-down resistor on HPD sink input guarantees‘input LOW’ when no display is plugged in
  • Back-power safe design on HPD_SINK to disallow backdrive current whenpower is off
• General
  • Power supply 3.3 V
  • ESD resilience to 8 kV HBM, 1 kV CDM
  • Power-saving modes
  • Back-current-safe design on all sink-side main link, DDC and HPDterminals
  • Transparent operation: no retiming or software configurationrequired
  • 32-terminal HVQFN32 package

• PC motherboard/graphics card
• Docking station