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About unused pin of SN74LVTH16500

Satoshi
Guru 19645 points

Please let me know about two point below.

・If signal pin (A and B) unused, is there also held at Vcc or GND?

　Is floating OK?

・On transparent mode, CLKAB is "don't care".

　Is there application note of PCB reference (disposal) in this case?

 

Best regards,

Satoshi

  • 0
    TI__Guru* 97046 points

    Satoshi-san,

    It is best practice to tie the unused inputs to ground, but with a 'Bus Hold' input device like this you can leave them floating -- they will latch to either high or low (usually low) very quickly and will not cause excessive power draw or other issues.

    I'm not sure exactly what you mean on your second question.  Do you want to know what to do with the CLKAB line if transparant mode is to be used?  I was not able to find any application notes on this part.

  • 0 in reply to Emrys Maier
    Guru 19645 points
    Dear Emrys Maier-san

    Thank you for reply.

    Your thinking is right.
    I want to know CLKAB when transparant mode.

    Best regards,
    Satoshi
  • 0 in reply to Satoshi
    TI__Guru* 97046 points
    Satoshi-san,
    The CLKAB input can be held high or low if transparant mode is being used. If this is the only mode of operation, I would just tie this pin to ground.