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Using TXS0104E

Steve Hardcastle
Prodigy 10 points
Other Parts Discussed in Thread: TXS0104E, TXB0104

Hello

I would like to use the TXS0104E for an SPI bus application but the specification suggests that the input low voltage needs to be a maximum of 0.15 Volts. I don't know of any devices that guarantee to drive that low. The device I need to use has a VOL of 0.4 Volts.

Is there a special technique needed to satisfy the 0.15 volts?

TIA

Steve

  • 0
    TI__Mastermind 30310 points

    Steve,

    May I suggest the TXB0104 for your application as it is designed for push-pull type I/O structures (e.g. SPI), as opposed to the TXS0104E which is designed for open-drain type I/O structures (e.g. I2C).

    Please review the TXB0104 datasheet and reply if you have any other questions. Otherwise, feel free to click the "Verify Answer" button.

    Kind Regards,

    Brian

  • 0 in reply to Brian Berner
    Prodigy 10 points

    Hello Brian,

    I am testing txb0104  voltage translator on SPI, an want to use as a substitute to max 3392 translator,

    but it doesnt work properly, sends false data, what can possibly cause that , max 3392 work without problem

    Thanks,

    Safi

  • 0 in reply to safi.cifci
    TI__Mastermind 30310 points

    Safi,

    You will have to be more specific about the system and the problem for me to understand why the TXB0104 is not working.

    What is on the A-side of the translator, what is on the B-side, and is there anything between them? Are there any passive components in the transmission line? What are the trace lengths? A schematic would help.

    To see what the "false data" looks like it would be beneficial to see a scope shot containing the input waveform to the TXB0104 and the output waveform of the TXB0104. Does it fail in both directions or only in one direction?

    Any other relevant information could help.

    Regards,

    Brian