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TXB0108 bidirectional level translator

Aditi Akula
Expert 1440 points
Other Parts Discussed in Thread: TXB0108, SN74LVC16T245

Hi,

I am working on a new design and was looking for a chip that can do the 5V to 3.3V level translation in one direction and 3.3V to 5V in the other.

I have found from the forums that TXB0108 does the bidirectional level translation.

I just want to confirm that this part drives out 5V on port B (it says port B tracks Vccb).

 

Thank  you,

Regards,

Aditi.

  • 0
    TI__Guru* 97425 points

    Aditi,

    I think I answered this in a previous post, but it may have been moved.

    If VCCB is 5V, the output is specified to drive to within 0.4V of 5V (or 4.6V) at the very minimum, with an output current of of -20uA. You can find this in the specifications on page 5 of the datasheet, as VOHB.

    Joseph Wu

  • 0 in reply to Joseph Wu
    TI__Guru* 97425 points

    Aditi,

    According to the selection guide that I found ( http://www.ti.com/lit/scyb018 ), there is no 16 channel version for this part.

    However there is the SN74LVC16T2451, which features two direction pins (that would select the direction of the channel 8 channels at a time for 16 channels, no auto direction sensing).

    You should be able to find a datasheet here: http://focus.ti.com/lit/ds/symlink/sn74lvc16t245.pdf

    Joseph Wu

  • 0 in reply to Joseph Wu
    Expert 1440 points

    Joseph,

    Thank you for your suggestion. I probably will be using the TXB0108 because it has auto-level sensing.

     

    Regards,

    Aditi.