Diodes Incorporated
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PI3WVR31212A (Obsolete)

DP/HDMI 1:2 De-Multiplexer Switch

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PI3WVR31212A has one passive output port1, one active (DP to HDMI) output port2. Passive output supports DP1.2 at 5.4Gbps in I2C mode. Active port2 supports HDMI1.4b at 3.4Gbps.All two output ports support auto port priority selection. Input port accepts DP1.2 and DP++ signals associated with output ports as described above.


Notebook and dongle


  • DP/HDMI 1:2 De-multiplexer switch with 4 high speed differential channel and AUX/DDC, HPD and CAB_DET signal channels
  • One passive output ports for DP1.2 at 5.4Gbps
  • One active output port with integrated DP to HDMI redriver (level shifter) supports HDMI 1.4 at 3.4Gbps
  •  Pin control mode supports auto port priority selection only
  • Pin control mode supports port2 with DDC bi-direction buffer switch only
  •  I²C control mode supports both auto and manual port priority selection
  • I²C control mode supports port2 with 8 levels equalization and 5 levels pre-emphasis
  • I²C control mode supports port2 with either DDC bidirection buffer switch or DDC passive switch
  • Very low operating power when passive port1 is selected
  • 3.3V power supply
  • 2KV HBM ESD protection for all I/O pins of port1 and all control pins
  • Packaging: 60 pin TQFN package (5x9mm, 0.4mm pitch)
  • Support Type 2 cable ID register

Product Specifications

Product Parameters

Configuration Demux, 1:2: 4-Differential Channel; 1 Passive DP, 1 Active HDMI
Differential Channels 4
HotInsertion 0
Lanes 4
OtherFeatures NA
RailToRail 0
Signal Type Differential
Single Ended Channels N/A
Voltage 3.3

Technical Documents

Application Information

Recommended Soldering Techniques


Additional Technical Documents are available upon request: 
Application information, Evaluation board, and Other technical documents

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Product Change Notices (PCNs)

A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

PCN # Issue Date Implementation Date Subject
PCN-2436 2019-11-14 2020-05-14 Device End of Life (EOL)
PCN-2328 2018-04-12 2018-10-12 Device End of Life for tray packaging only


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