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TCA9555: TCA9555 - Pullup Volatge

vijayavani raju
Prodigy 220 points
Part Number: TCA9555

Hi Team,

Can the pull voltage of SCL SDA be 5V and the interrupt pin pull up voltage be 3.3V? (TCA9555 powered with 5V)

Can the pullup voltage be different for SCL SDA & INTP. Please share your inputs.

AwaIting response

  • 0
    TI__Mastermind 49400 points

    Hello Vijayavani,

    The INT pin is an output which uses an open drain architecture, this means you can pull the voltage to any rail you wish (as long as its within the recommended operating conditions) so a 5V = Vcc and a 3.3V pull on INT is not a problem.

    -Bobby