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

over 7 years ago

0 BOBBY over 7 years ago

TI__Guru* 75391 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 Tsukui Yusuke over 7 years ago 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

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TCA9535: About VCC = 0V condition