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TXS0102: Design Query

Abhishek Manoj
Intellectual 825 points

Part Number: TXS0102
Other Parts Discussed in Thread: TXB0102,

Hi Team,

Please address the below query.

I was planning to use the TXB0 series level translator in the design.

The TXB0102 is an auto-direction level translator intended for push-pull buses. However, it is generally not recommended for control signals that include:
• Pull-up or pull-down resistors
• Long trace routing
• Slow signal edges

Since the current design includes pull resistors and isolators in the signal path, a TXS0102 or a simple buffer is typically preferred in such cases.

Could you please confirm whether I can proceed with the TXB series level translator, or if it would be better to select the TXS series for this requirement

Regards,
Abhishek

 

  • 0
    TI__Guru 55291 points

    Hi Abhishek,

    Please see previous E2E post answered:  TXB0102: Design Query 

    If additional help is needed please clarify your specific concerns. 

    Regards,

    Jack

  • 0 in reply to Jack Guan
    Intellectual 825 points

    Hi Jack,

    In my current design i was using TXB0x for my DIO interfaces which has external pull-up and pull-down resistors. But the above query was given by my end customer whether TXB0 is fine for the digital IO signals with pull-up and pull-down resistors.

    For this case they are suggesting going with TXS0x series.

    Could you please confirm whether i proceed with TXS0x or TXB0x for my design.

    Regards,

    Abhishek

  • 0 in reply to Abhishek Manoj
    TI__Guru 55291 points

    Hi Abhishek,

    It boils down to if your application requires open drain drivers or strictly push pull. The effects of using pullups/ pulldowns on the TXS and TXB will be similar, and in both cases, it is suggested to use weak values, due to the internal pullups of the TXS and internal series resistance of the TXB. This app note provides the details of operations with various pullup/pulldown values used. 

    Regards,

    Jack