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TCA9535: About VCC = 0V condition

Tsukui Yusuke
Guru 21930 points
Part Number: TCA9535

Hi,

Could you tell me about TCA9535 signal input condition when VCC=0?
Is it OK to input a signal to the pin(P00-P17) when Vcc=0V?
If there are any problems, please point them out.

Best Regards,
Yusuke/Japan Disty

  • 0
    TI__Guru 64110 points

    Hello Tsukui-san,

    The TCA9535 port pins should be high impedance even when Vcc=0. Input signals on these lines will be okay but I recommend you do not go over 5V on this line as is recommended on the datasheet.

    Thanks,

    -Bobby

  • 0 in reply to BOBBY
    Guru 21930 points

    Bobby-san,

    Thank you for your information and support.
    I will report that information to the customer.

    Best Regards,
    Yusuke/Japan Disty