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HD3SS3415: USB3.0 4:1MUX lineup

Conor
Mastermind 8920 points
Part Number: HD3SS3415
Other Parts Discussed in Thread: TUSB1002, , HD3SS3212

Hi,

DIodes' PI2USB4122 has NRND status and we are looking for an equivalent.

Do you have a lineup of 4:1 MUX replacements that support USB3.x? I couldn't find it from the TI store.

Also, if it has not been released, do I need to combine multiple HD3SS3415 (2:1 MUX) to make it 4:1? In that case, will a signal correction IC such as TUSB1002 be required?

Thanks,

Conor

  • 0
    TI__Guru** 113590 points

    HI Conor: 

        our group don't have 4:1 mux  to support UBS3.x application. you need HD3SS3415 + HD3SS3212 to support 4:1 .

    Regards

    Brian

  • 0 in reply to Brian Zhou
    Mastermind 8920 points

    Hi Brian,

    I am considering a 2-chip configuration of HD3SS3415 + HD3SS3212.

    Q1
    Where should I insert the AC Coupling capacitor when connecting in multiple stages? Is it better to put it between HD3SS3415 and HD3SS3212?

    Q2
    How should we consider signal loss and compensation?

    Q3
    Looking at the data sheet for HD3SS3415, there is a description of Insertion Loss = -1.5dB. How should I view this value? Is it a value that has no effect even if loss is added in a 2-chip configuration?
    For example, how much of an effect will there be if we increase the multi-stage configuration to 8:1?

    Thanks,

    Conor

  • 0 in reply to Conor
    TI__Guru** 113590 points

    Hi Conor

    for Q1: prefer to place AC cap between mux and connector , not between two muxes.

    for Q2: you need to add insertion loss for mux1 and mux2, for example, at 5Ghz, mux1 is 0.5db insertion loss and mux2 is 0.6db insertion loss. so total insertion loss is 1.1db insertion loss at 5Ghz.

    for Q3: same as Q2, -1.5db insertion loss mean there is 1.5db loss between output and input signal at 4Ghz.

      For multi-stage, you need to add insertion loss from each stage at same frequency.

    Regards

    Brian