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LSF010x max propagation delay

Jose Angel Cano
Prodigy 20 points

Hi,

I have a design where a bidirectional level translator is required (1.8 to 3.3V). For this purpose I was thinking on a LSF010x device which seems to fit in this application. However, propagation delay is a critical constraint in this application but I can only find typical delays on the datasheet. 

Is this data available? I would need this information to make a decision on which part I could use

Best regards

Jose A.

  • 0
    TI__Expert 6335 points
    Jose,

    I've notified the applications engineer of your request but they are currently on travel. When do you need a response?

    Best Regards,
    Nirav
  • 0 in reply to Nirav Patel
    Prodigy 20 points

    Hi Nirav,

    As you could imagine, as soon as possible :)

    If you could provide an answer early next week it would be great.

    Thanks

    Jose Angel

  • 0 in reply to Jose Angel Cano
    TI__Mastermind 28645 points

    Hey Jose,

    I would like to start off this  response with the fact I cannot guarantee any of the max specs of the devices for tplh or tphl.

    LSF101 max spec is approximately 3ns

    LSF102 max spec is approximately 1.7ns

    I don't have data for LSF108

    I will reiterate that we do not guarantee these specifications. That being said I hope this helps.

    Note these values are for 50pF capacitance.

    Thanks,

    Daniel

  • 0
    TI__Guru 62180 points
    Hi Jose ,

    The LSF is a passive translation device which doesn't have drive of its own . The host device should provide the necessary drive and the prop delay from A -B is dependent on the loading at the output. The ron , pull up resistance & load capacitance combined determine the prop delay and hence it cannot be spec'ed on the datasheet as such .