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TM4C123GH6PZ: TM4C123GH6PZ overvoltage power supply

Kajaha Pika
Prodigy 10 points
Part Number: TM4C123GH6PZ

What happen on the Tiva™ TM4C123GH6PZ Microcontroller when an overvoltage up to 4.4V appeared on the VDD and VDDA during hundreds of microseconds (166us after my calculation)?

I have had a look within the datasheet but I did not find anything about.

Actually I use an overvoltage protection IC that has an overdrive time during which the overvoltage is fully applied on the microcontroller. Whatever an overvoltage IC used, this overdrive time remains but the value may be lower (e.g. 10us for others)

Does someone has the response to this topic? Is there anywhere additional document containing the response?

Thank you very much for your response

K. Pika

  • 0
    TI__Guru*** 128255 points
    Hello Kajaha,

    The absolute maximum rating at which the TM4C123GH6PZ is specified for is 4V for VDD and VDDA. Therefore at 4.4V the voltage would have exceeded maximum ratings. As such, we cannot comment on exactly what may have occurred to the device. We don't have documentation regarding the device behavior after an overvoltage occurs.

    It is possible it is undamaged and will work fine, but it is also possible that the device may have been damaged and could operate outside of spec in the future as a result.

    If this happened on a single unit, it may be best to replace it.