TCA9539-Q1: INT pin only pull high question

Lawrence He

Genius 3115 points

Part Number: TCA9539-Q1

Hi, Support Team

about INT pin could we only pull high and we dont connect to MCU? have any concern?

if any suggestion, Please advise me.

Thanks,

Best regards,

Lawrence

over 2 years ago

+1 Clemens Ladisch over 2 years ago

Guru 320450 points

The /INT pin is an output and can be left open. If you never read it, you do not need to connect it to the MCU.

+1 Tyler Townsend over 2 years ago

TI__Guru 55898 points

Hi Lawrence,

I agree with Clemens here. /INT pin is an output that can be left open without a pull-up resistor if unused. The use of a pull-up resistor is fine as well.

Regards,

Tyler

Interface

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TCA9539-Q1: INT pin only pull high question