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TUSB2077A: Logic level on pin 8 for 'Ganged' overcurrent Detection

Christian Greeff
Prodigy 680 points
Part Number: TUSB2077A


Greetings,


I have a question regarding the TUSB2077A.

In my customers application, pin 47 () is always tied to logic high (3.3v) and they'd like for the overcurrent detection to be in ‘ganged’ mode.

What logic level For Pin 8 (EEDATA /)  needs to be applied to achieve ‘ganged’ overcurrent detection?

Thanks so much,

-Christian Greeff

  • 0
    TI__Prodigy 680 points

    Based on the datasheet the logic level on pin 8 to achieve ‘ganged’ overcurrent detection should just be a logic low as it looks to be active low.

    I think the confusion came from this portion of the datasheet

    Everywhere else in the data sheet the notation is as below:

    Can you confirm that my assessment is correct?

    Thanks,

    -Christian Greeff

  • 0 in reply to Christian Greeff
    TI__Guru 60870 points

    Hi Christian,

    Yes, GANGED is an active low input.  It should be low when the hub is configured with ganged power switches and high for individual power switches.

    Regards,

    JMMN