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SN65HVD232: Will it work if VCC = 5V?

MANIKANTA GANALA
Prodigy 20 points
Part Number: SN65HVD232


Full part no - SN65HVD232D

My schematic - 

Hi all, there is a problem in my PCB where 5V track is connected to VCC pin instead of 3.3V.

So will it work?

One more thing - pins 5 & 8 are NO CONNECT pins but I have 3.3V and a GPIO pin connected to them respectively (to be compatible with another transceiver IC).

Will that pose any problem?

Please help me with this. It is urgent.

  • 0
    TI__Guru 74322 points

    Manikanta,

    Thanks for bringing this to E2E. If 5V is applied to VCC on the SN65HVD232, the pin won't be damaged, but the device will be out of spec and none of the datasheet parameters will be guaranteed. Also, the CAN bus will then be biased to 5V and defeat the purpose of having a 3.3V CAN transceiver.

    Connecting 3.3V to the NC pins is no problem, this won't have any negative effect on the IC.

    Regards,

  • 0 in reply to Eric Hackett
    Prodigy 20 points

    Yes. I have changed 5V to 3.3V and it started working. And I left NC pins connected to 3.3V and a GPIO pin as it is. No problem at all.