• State Resolved
  • Locked Locked
  • Replies 2 replies
  • Subscribers 32 subscribers
  • Views 532 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.

TCA9548A: TCA9548A channel powered ON but TCA9548A is powered DOWN

J.P.
Intellectual 300 points
Part Number: TCA9548A

I would like to know if there is any issue with the device TCA9548AMRGER being powered off and the the I2C channels remain powered?

Ie VCC=1.8V and SD3=2.5V, when 1.8V is powered OFF, 2.5V is powered ON

Thanks!

  • 0
    TI__Guru 64110 points
    Hey JP,

    Our switch Devices have all the gates of the pass FETs pulled low when Vcc is powered off. This means the device is high impedance so the two I2C bus channels are isolated.

    There should be no issues if the device is not powered but the channels have pull up resisters that have voltages that are powered.

    -Bobby
  • 0 in reply to BOBBY
    Intellectual 300 points
    Thanks! your responses are very succinct and quick!