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Unused pins on TUSB2046B hub?

DHarmon
Genius 16430 points

If the customer does not need to use all the 4 ports how should they connect the unused pins for the unused ports. Is it necessary to terminate them?

  • 0
    TI__Guru 60870 points

     

    The DP and DM signals of the unused port should be tied to ground with 15K resistors like the pull-downs used on the active ports.

    The OVRCUR/ input of the unused port can be left tied to the other OVRCUR/ inputs if the hub is configured as GANGED.

    If the hub is not configured as GANGED, OVRCUR/ input of the unused port should have a pullup resistor.  A value of 1.5K is sufficient.

    The PWRON/ output can be left unconnected.