PI3WVR31212ZLEX

Overview

The PI3WVR31212ZLEX is a DP/HDMI 1:2 de-multiplexer switch manufactured by Diodes Incorporated. It features one passive output port (Port 1) supporting DisplayPort 1.2 at 5.4 Gbps and one active output port (Port 2) with an integrated DP-to-HDMI re-driver supporting HDMI 1.4b at 3.4 Gbps. The device operates on a single 3.3V supply, drawing 1 mA in Port 1 mode and up to 175 mA in Port 2 mode. It utilizes a 60-pin TQFN package (5x9mm). Key electrical parameters include a maximum propagation delay of 2000 ps for TMDS pins and 80 ps for general channels. The component supports I2C or pin control modes for automatic or manual port selection based on HPD signals.

Feature Summary

• Integrates a passive DisplayPort output path and an active DP-to-HDMI level shifter within a single IC.
• Supports dual control interfaces including automatic priority selection via HPD detection and configurable I2C registers.
• Provides programmable signal conditioning for the HDMI output, featuring eight levels of equalization and five levels of pre-emphasis.
• Includes dedicated auxiliary, DDC, and hot-plug detect channels with specific buffering capabilities for each port.

Applications

• Notebook computers requiring video output switching
• Docking stations converting laptop DisplayPort outputs to HDMI displays
• Video docking hubs managing multiple display connections

Procurement Notes

Verify the complete part number includes the 'X' suffix for tape and reel packaging when ordering. Confirm RoHS compliance status through official manufacturer documentation prior to procurement. Ensure the design accommodates the specific thermal requirements associated with the 60-pin TQFN package during operation.

Selection Notes

Select this component when a system requires simultaneous support for both native DisplayPort and HDMI sinks from a single source. The choice between Pin Control and I2C modes depends on whether automatic HPD-based switching or manual register configuration is preferred. Verify that the host controller can provide the necessary voltage levels for the AUX and DDC channels if utilizing the adapter functionality.

Part Context

This device belongs to the Pericom WVR series of video switches, now distributed under Diodes Incorporated. It is designed to bridge the gap between modern mobile processors using DisplayPort alt-mode and legacy HDMI displays. The integration of the re-driver eliminates the need for external level shifting components typically required for HDMI conversion.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should consult the manufacturer's current product portfolio for updated alternatives or cross-reference options based on specific pinout and functional requirements.

FAQ

How does the device handle port selection?

The PI3WVR31212 supports automatic port selection based on Hot Plug Detect (HPD) signals. In I2C mode, it also allows manual selection via registers. Priority can be configured using the PRI_SEL pin or I2C settings.

What is the difference between Port 1 and Port 2?

Port 1 is a passive output supporting DisplayPort 1.2 signals directly. Port 2 is an active output containing an integrated DP-to-HDMI re-driver/level shifter, supporting HDMI 1.4b signals with programmable equalization and pre-emphasis.

Can the device operate without I2C communication?

Yes, the MS pin selects the control mode. Setting MS low enables Pin Control mode, which relies on hardware pins (PRI_SEL, EQ, PRE_EMP, ROUT_SEL) for configuration rather than I2C commands.