Diodes Incorporated
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PCIe 3.0, 2-Lane (4-Channel), Differential 2:1 Mux/DeMux. 3.3V

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The PI3PCIE3412A is an 8 to 4 differential channel multiplexer/demultiplexer switch. This solution can switch 2 full PCI Express® 3.0, lanes to one of two locations. Using a unique design technique, Diodes has been able to minimize the impedance of the switch such that the attenuation observed through the switch is mininal. The unique design technique also offers a layout targeted for PCI Express signals, which minimizes the channel to channel skew as well as channel to channel crosstalk as required by the PCI Express specification. PI3PCIE3412 can also be used for application up to 12Gbps.


  • 4 Differential Channel, 2:1 Mux/DeMux
  • PCI Express® 3.0 Performance, 8.0Gbps
  • Bi-directional Operation
  • Low Bit-to-Bit Skew, 10ps max
  • Low channel-to-channel skew, 20ps max
  • Low Crosstalk: -35dB@4 GHz
  • High Off Isolation: -22dB@4 GHz (8.0Gbps)
  • Low insertion loss: -1.3dB@4 GHz (8.0Gbps)
  • Return loss: -21dB@4 GHz
  • Support for DP1.2 - HBR2, HBR, RBR
  • Supply Voltage 3.3V
  • Packaging (Pb-free & Green): – 42-contact, TQFN (ZH42)


  • Routing of PCI Express 3.0
  • DP1.2
  • USB 3.2 Gen 1
  • SAS2.0
  • SATA3.0
  • XAUI
  • RXAUI signals with low signal attenuation.

Product Specifications

Product Parameters

Compliance (Only Automotive supports PPAP) Standard
Configuration Mux, 2:1: 4-Differential Channel
Differential Channels 4
Lanes 2
Type 2:01
Voltage 3.3

Technical Documents

Design tool model software

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-2328 2018-04-12 2018-10-12 Device End of Life for tray packaging only