• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 33 subscribers
  • Views 299 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TCA9539-Q1: TCA9539-Q1 Unuse pin design

user4979899
Expert 3080 points
Part Number: TCA9539-Q1

Hi Sir,

If we don't use the P13/14/15/17 and have pull down 47K resistor as below red circle. Is there any concern?

Do you have any suggestion if we don't use this pin?

Thanks

  • 0
    TI__Mastermind 49040 points
    Hey Anne,

    If you have unused IO pins, tying them to a pull down resistor is the correct thing to do. This device does not have an internal reference resistor tied on the IOs so you need to reference the pin if you are not using it (like what you are doing).

    Thanks,
    -Bobby