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TXS0102: Any reason why the circuit below wouldn't function?

JPAlleyne
Expert 1565 points
Part Number: TXS0102
Other Parts Discussed in Thread: SN74LVC2G34

When checking the output of the device, the lows don't go to zero volts. The ground is fine and the VCC bot are going to the same 3v3 rail. the circuit is shown below.

thanks,

JP

  • 0
    TI__Genius 16735 points
    Hi JP,

    The TXS family parts will not go to 0 V if the input doesn't go to 0 V. These devices are suitable for open drain applications and I am assuming it is draining current down your input buffer which is causing a voltage that is above 0V. This device does not act as a buffer.
    This FAQ talks the differences in the auto bidirectional families. e2e.ti.com/.../719537
    This is our training page with videos on the LSF family which is very similar to the TXS family for you to learn more about designing with it. training.ti.com/TLM-LSF-Intro

    It seems like you are inputs are not changing direction, so do you think a unidirectional buffer could work for you? That would get rid of your issue of not reaching 0V. Maybe the SN74LVC2G34 could work? If you let me know your requirements, I can help find a partnumber.

    Thanks!
    - Karan
  • 0 in reply to Karan Kotadia
    Expert 1565 points
    Thanks for the update. I think that part should work, I'll check and get back to you. Thanks.
    JP