TCA9539-Q1: How should we deal with unused pin of TCA9539-Q1

junsong gu

Prodigy 170 points

Part Number: TCA9539-Q1

Tool/software:

HI TI,

How should we deal with unused pin of TCA9539-Q1? What is the reset state of these pin? Can we just left it float?

Junsong Gu

6 months ago

0 Clemens Ladisch 6 months ago

Guru 294720 points

Unused outputs can be left open; unused inputs must not be left floating. The I/Os are configured as inputs by default, so you should reconfigure them, or connect them to GND or VCC with or without a resistor.

0 junsong gu 6 months ago in reply to Clemens Ladisch

Prodigy 170 points

Thanks for your reply~~

0 Tyler Townsend 6 months ago in reply to junsong gu

TI__Mastermind 36463 points

Junsong,

Thank you for your question. Feel free to submit a new thread if you have any additional questions.

Regards,

Tyler

Interface

Interface forum

TCA9539-Q1: How should we deal with unused pin of TCA9539-Q1