• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 29 subscribers
  • Views 260 views
  • Users 0 members are here
Support feedback
Options
Options
Related

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.

TMAG5170: Okay to float !ALERT?

Luke
Prodigy 20 points
Part Number: TMAG5170

If not using the alert function, is it okay to leave the !ALERT pin floating or should it be pulled one way?

  • 0
    TI__Mastermind 21120 points

    Luke,

    Thanks for reaching out with your question.  This pin is a monitored I/O.  Typically for any I/O pin if the input is disabled, you might be able to get away with letting the pin float, but the main risk is that when configured as an input there is the possibility that a floating pin could cause spurious inputs or worse, create an internal leakage path.

    In this case, the device has an ability to monitor the voltage on this pin, which is used to set one of the status bits of the device.  This pin monitoring function will effectively create an unknown input case which may lead to an undetermined device behavior.  Given this, It is not recommended that the pin be left floating.  It would be much safer to tie it to GND when not in use.  

    If tied to GND there is no risk of an unknown input case.  This pin is active low as an output, so if somehow enabled and the device attempts to drive the pin, there not be a path from VCC to GND through the device.

    Thanks,

    Scott