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TXS0101: What is the drive strength of the TXS0101YZP?

Louie
Expert 3180 points
Part Number: TXS0101
Other Parts Discussed in Thread: SN74LVC1T45

Hello,

What is the drive strength of the TXS0101YZP? The source current of the driver is 10mA. Can i use this for the driver whose drive strength is 10mA?

Thanks,

Louie

  • 0
    TI__Guru* 96591 points

    Hi Louie,

    The TXS0101 is a fairly complex device including both active and passive translation elements. It includes one-shots that drive the outputs for a very brief period of time when a rising edge is seen on the opposite pin, but otherwise the drive strength comes from the driver (for sink current) or the pull-up resistor (for source current).

    Please forgive my artwork.  If a driver is forcing pin A low, then the current will sink from B to A into the driver.  If the driver is forcing pin A high, then the center switch will be in 'high impedance' mode, and the output current will come through the pull-up resistor.

    For a very brief period of time, the one-shot will bypass the pull-up resistor to help pull the line high faster, but then it turns off and the line is held by the 10kohm resistor.

  • 0 in reply to Emrys Maier
    TI__Expert 3180 points
    Hello,

    What would you recommend instead for a bidirectional buffer for an open drain system operating at 3.3V?

    Thank you,
    Louie
  • 0 in reply to Louie
    TI__Guru* 96591 points
    TXS0101 shouldn't have any problems for your application.

    There's also the LSF family -- if you'd like to learn more about those, we have a short video series that explains them and how they work in detail: training.ti.com/LogicMinute
  • 0 in reply to Emrys Maier
    TI__Expert 3180 points
    Hello,

    Last question, will this support drive source up to 10mA?

    Thanks,
    Louie
  • 0 in reply to Louie
    TI__Guru* 96591 points
    It depends on what you mean by 'source 10mA' -- is this a transient or DC power requirement? Are you trying to drive 10mA to a relay or LED or something? If so, I'd recommend a push-pull driver like SN74LVC1T45, or you could use the TXS to level translate, then use a regular buffer to provide the added current.

    If you can provide a schematic or block diagram, it would help me understand what you're trying to do.