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TCA9539PW IO Expander

SOORAJ SUNDARAN
Prodigy 20 points

Hi Team,

We have some active low outputs from the IO Expander TCA9539PW, Will resetting the TCA9539PW will drive these Active low outputs.

we could only find the waveforms during reset time for the IOs configured as Input, kindly share us the info regarding outputs during the reset times,

  • 0
    TI__Mastermind 49040 points

    Hey Sooraj,

    "Will resetting the TCA9539PW will drive these Active low outputs."

    No, toggling the reset will actually make the I/Os a HI-Z input. If you need the I/O pin to be biased to GND upon power up then I would suggest tying a pull down resistor on the I/O pin.

    "we could only find the waveforms during reset time for the IOs configured as Input, kindly share us the info regarding outputs during the reset times,"

    Outputs becomes Hi-Z inputs.

    Thanks,

    -Bobby

  • 0 in reply to BOBBY
    Prodigy 20 points

    Hi Bobby ,

    Thank you so much for the reply.