• State Resolved
  • Locked Locked
  • Replies 2 replies
  • Subscribers 35 subscribers
  • Views 177 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.

TCA9544A:Circuit configuration that enables HOT SWAP

?? ??
Prodigy 90 points
Part Number: TCA9544A

Hello

Will the HOT SWAP function work effectively in a circuit with the following configuration?

Best regards.

  • +1
    TI__Genius 15345 points

    Hello,

    An engineer is working on this question. Because of the holidays, TI E2E design support forum responses may be delayed through Jan. 3. Thank you for your patience.

    Best,

    Chris

  • 0
    Guru 316470 points

    The TCA9544A is a slave device, so its I²C pins are high impedance until the master accesses it.

    The image does not show any other I²C devices on the main PCB, so there is no danger that the plug-in action could disturb other I²C communication.

    When the extension LDO has not yet started up, a current might flow from the main 3.3 V through the pull-up resistors into the externsion 3.3 V supply. As far as the TCA9544A itself is concerned, this is no problem.