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Can I use PCIe Gen2 switch for PCIe Gen1 ?

Benjamin Amzallag
Prodigy 30 points
Other Parts Discussed in Thread: HD3SS3411, TS3DDR4000, TS2PCIE412, TS5A3157

for a PCIE/104 application I need to use a switch 2:1 for a PCIe 1 application. 

I want to know if I can use the PN HD3SS3411  .

thanks

  • 0
    TI__Mastermind 45575 points

    Ben, 

    To evaluate if a signal switch like the HD3SS3411 can support a particular signal standard (like PCIe Gen1) you need to look at the number of channels needed, data rate/ bandwidth, and voltage range of the signal.  Below is some information on the different types of PCIe signals.

    The HD3SS3411 has the bandwidth to support PCIe gen 1 signals and can support the common PCIe voltage range.  The HD3SS3411 is only a single lane device so I would check how many of these switches would be needed.

    If you need multiple channel devices I would look at the TS3DDR4000 (12 channels) or the TS2PCIE412 (8 channels) 

    Thank you,

    Adam

  • 0 in reply to Adam Torma
    Prodigy 30 points

    Thanks Adam for your quickly answear

    My application is a PCIe/104 module whose be able to be stacked up or down , 

    if the module is stacked up the lane used from connecor will be lane0 - if the module is stacked down the lane used will be lane 3.

    then on the module I need a switch between this 2 PCIe Gen1 lane (lane 0 and lane 3) and their respective reference clock (100MHz from connectors)

    can I use the   TS2PCIE412 for switching between lanes and the HD3SS3411 for switching between reference clock or maybe for reference clock it not neccessary to use a more simple switch (please advice)

    thank you

     

  • 0 in reply to Benjamin Amzallag
    TI__Mastermind 45575 points

    Benjamin,

    Could you draw a picture of the different configurations of signal paths and data rates you need to support?  It would help me understand your application a bit better.

    If the reference clock is only 100MHz you do not need a high speed switch like the TS2PCIE412 or HD3SS3411.  You could you a switch like the TS5A3157 I found using the signal switch selection tool on TI.com and filtering tools on the left hand side by 1:2 SPDT, 1 channel, and sorted the bandwidth from largest to smallest.  

    Thank you,

    Adam