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Simple USB hub design

Discussion in 'Electronic Design' started by [email protected], May 8, 2013.

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  1. Guest

    Could any electronics guru on this newsgroup
    direct me to a not too complicated USB hub
    design ? I have been told that there are some
    that need firmware, while others do not. Any
    hints, suggestions would be greatly appreciated.
  2. miso

    miso Guest

    Design as in roll your own? Or design as in just buy one?

    I'd suggest trolling the New Egg customer reviews, but I warn you, you
    won't find a hub without someone complaining it sucks.

    In general, anything with a NEC chip is usually better than the pack.
  3. Nico Coesel

    Nico Coesel Guest

    I have designed in several SMSC USB-ish chips in medium volume
    products and they work reasonably. Don't forget to add common mode
    chokes and transient suppressors!

    A device I choose randomly can even be bought in small quantities:
  4. P E Schoen

    P E Schoen Guest

    wrote in message
    I use the TUSB2046b from Texas Instruments. It uses a 6 MHz crystal and a
    few external components, and can be configured as a self-powered or
    hub-powered 4 port hub.

    About $3 in small quantities:

    The only problem I had initially, IIRC, was an unterminated RESET line or
    some other control pin. Otherwise it's just plug-n-play.

  5. Nico Coesel

    Nico Coesel Guest

    I have no idea whether that is supported or not. Besides that USB2.0
    can already go up to 400Mb/s. I'm not sure if you would gain much
    speed. It depends largely on the USB flash drives and where the data
    needs to go.
  6. Nico Coesel

    Nico Coesel Guest

    When I look at the datasheets from an SMSC USB3.0 capable hub it seems
    the USB3.0 superspeed paths are seperated from the USB2.0 paths so a
    USB2.0 device will not be faster.
    So far I only used the USB2.0 ethernet and ethernet / USB hub combos
    from SMSC. The people responsible for the software in those projects
    however did extensive tests which show the chips are stable under

    Doing a USB3.0 layout may not be trivial. Routing traces carrying
    5Gbps on FR4 is doable but there are some pitfalls.
    It seems it will take more work to get it going if you insist on using
    [email protected] flash drives. USB3.0 flash drives are already widely available.
  7. Guest

    Thanks for the feedback. This is basically what I was
    looking for, some sort of a reference design.
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