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TS2PCIE412: PCIe multiplexing with passive switches

Vesa Simola
Prodigy 10 points
Part Number: TS2PCIE412
Other Parts Discussed in Thread: TMUX1574, , TMUXHS4412

Hi,

  • Would this kind of switching for the PCIe (gen 2) data lanes and control signals work ? The switches are not dynamically controlled, but bus is connected either-or to Endpoint1 or -2. After switching there will be handshaking through the bus. Idea is to use passive SPDT switches instead of a PCIe packet switch.
  • TS2PCIE412RUAR is 4-CHANNEL 8:16 MULTIPLEXER/DEMULTIPLEXER PCI EXPRESS SWITCH
  • TMUX1574 Low-Capacitance, 2:1 (SPDT) 4-Channel

Kind Regards,

Vesa S.

  • 0
    TI__Genius 17001 points

    Hi Vesa,

    Thank you for reaching out. You have stated that the switches would not be dynamically controlled - I would like to double check that your intention is the switches outputs would not be changed during protocol negotiation or after PCIe link-up, correct?

    I can additionally recommend TMUXHS4412 as an alternative to the TS2PCIE412.

    I am re-assigning to an additional product line for recommendation on the TMUX1574.

    Best,
    David

  • 0
    TI__Genius 10552 points

    Hi Vesa,

    Thanks for reaching out here! I don't see any issues using the TMUX1574 here. You've picked a very popular, high bandwidth part here. As long as the voltage ranges being used with the device are within operating conditions, you should have no problem passing these signals through the device. 

    Let me know if you need anything else here!

  • 0
    Prodigy 10 points

    Hi,

    Thanks for quick reply!!

    Yes the switches are going to be in stable position after handshake until the controlling CPU decides to reset PCIe-link for alternative position.

    TMUXHS4412 looks very good alternative, thanks for that.

    Br. Vesa