armaniake

Member Since: October 6, 2008

Country: United States

  • Tutorial - Sensor Interfacing | about 5 years ago

    Hi,
    You are saying:
    This circuit will not work the other direction (high voltage to low voltage) because of the internal diode within the MOSFET will forward bias.
    But the AppNote you are pointing too explain in chapter 2.3.1 that the circuitry can be used as a bidirectional shifter… They are saying that a level 0 on the TX-5V side will forward conduct the internal diode, and this will start to raise Vgs to the point it will start to conduct and drive the TX-3.3V node to 0V.
    Could you comment?
    Thanks

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