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Original question:

TCAN1044V-Q1: The VIO supply in standby mode

TCAN1044V-Q1: Supply Current Spec

Muwei Zheng
Intellectual 1230 points

Part Number: TCAN1044V-Q1

Tool/software:

Hi team,

I have a questions about supply current spec in TCAN1044V-Q1 datasheet. Could you tell me why supply current without VIO is higher than with VIO?

Thanks,

Muwei Zheng

  • 0
    TI__Guru 69782 points

    Muwei,

    This is because without VIO, VCC is the only rail supplying every function of the device. With VIO, VCC is biasing the CAN bus and supplying some of the digital logic, while VIO is acting as the internal pull-up for the logic pins, and also supplying some of the digital logic.

    Regards,

    Eric Hackett