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TCA9539 / Working when the power supply starts up

Kuramochi Tadahiko
Guru 28715 points

Other Parts Discussed in Thread: TCA9539

Hi,

My customer is considering to use the TCA9539 and has questions.

1. Does the TCA9539 output unintended "H" signal when power supply starts up?

   (Another bender's device seems to output unintended signal.)

2. Could you let me know if the TCA9539 has any errata or precedent trouble?

Best Regards,

Kuramochi

  • 0
    TI__Genius 16560 points
    Hello Kuramochi-san,

    1) The TCA9539 will default to high-z when power starts up. It should not go high or low.

    2) There are currently no known erratas or troubles with the device. The startup behavior of the device has been extensively tested recently as we released a Q1 variant of the TCA9539, and extensive testing was done to ensure reliability at higher temperatures.