描述 Description

PTN3363 is a low power, high-speed level shifter device which converts four lanes oflow-swing AC-coupled differential input signals to DVI v1.0 and HDMI v1.4b compliantopen-drain current-steering differential output signals, up to 3.4 Gbit/s per lane to support36-bit deep color mode, 4K x 2K video format or 3D video data transport. Each of theselanes provides 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 ? to 3.3 Von the sink side. Additionally, the PTN3363 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 source sideand 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 providing redrivingand level shifting as well as disablement (isolation between source and sink) of the clockand data lines.
The low-swing AC-coupled differential input signals to the PTN3363 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 configured tocarry DVI or HDMI coded data, they do not comply with the electrical requirements of theDVI v1.0 or HDMI v1.4b specification. By using PTN3363, 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 pins low.
The PTN3363 main high-speed differential lanes feature low-swing self-biasing differentialinputs which are compliant to the electrical specifications of DisplayPort Standard v1.2aand/or PCI Express Standard v1.1, and open-drain current-steering differential outputscompliant to DVI v1.0 and HDMI v1.4b electrical specifications. The I2C-bus channelactively buffers as well as level-translates the DDC signals. The PTN3363 supportsstandby mode in order to minimize current consumption when Hot Plug Detect signalHPD_SINK is LOW.
PTN3363 is powered from a single 3.3 V power supply consuming a small amount ofpower (72 mW typical) and is offered in a 32-terminal HVQFN32 package.

特性 Features

High-speed TMDS level shifting
? Converts four lanes of low-swing AC-coupled differential input signals to DVI v1.0 and HDMI v1.4b compliant open-drain current-steering differential output signals
? TMDS level shifting operation up to 3.4 Gbit/s per lane (340 MHz TMDS clock) supporting 4K?×?2K 3?Gbit/s and 3D video formats
? Programmable receive equalization
? Integrated 50?Ω termination resistors for self-biasing differential inputs
? Programmable high-impedance termination resistors for HDMI re-driver usage with external 50?Ω termination resistors
? Back-current safe outputs to disallow current when device power is off and monitor is on
? Disable feature to turn off TMDS inputs and outputs and to enter low?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 sink side 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 current when 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 the source side, or from 5?V on the sink side to 3.3?V on the source side
? 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 when power is off
HDMI dongle detection support
? Incorporates I2C-bus slave ROM
? Responds to DDC read to address 81h
? Feature enabled by pins DDET and DDC_EN (must be enabled for correct operation in accordance with DisplayPort interoperability guideline)
General
? Power supply 2.8 V to 3.6 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 HPD terminals
? Transparent operation: no retiming or software configuration required
? 32-terminal HVQFN32 package

應用 Application

PC motherboard/graphics card


Docking station

DisplayPort to HDMI adapters supporting 4K x 2K and 3D video formats

DisplayPort to DVI adapters required to drive long cables