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SN74LVC1G07: leakage current at output in tri state

Roland Thamm
Prodigy 60 points
Part Number: SN74LVC1G07
Other Parts Discussed in Thread: SN74AUP1G07

datasheet gives a maximum value for the leakage current at the output at tri state Ioff = +- 10 uA. Our measurment shows a value of less than 1 nA at 80 °C.

Question is now what is the real maximum value of this data because our application requires a value of less 50 nA.

Can TI confirm a value less than 50 nA for the 74LVC1G07 over the whole temperature range

Thank you for your support.

  • 0
    TI__Expert 6680 points

    Hi Roland,

    Unfortunately, TI can't guarantee anything other that what's specified on the datasheet. All of our LVC family devices will have this same leakage spec of 10uA.

    The only device that we have that closest fits your spec is the SN74AUP1G07, with an Ioff @ VCC = 0 of 0.6uA

    Thanks!

    Chad Crosby

  • 0 in reply to Chad Crosby
    Prodigy 60 points

    Thank you for the quick answer.

    I understand your statement about the commen specification for the LVC family.

    After our measurement we think the real maximum value is different to the specification in the data sheet.

    please ask for the expected value for Ioff inside TI.

    Would be very helpful to us.

    We appreciate your support.

    Best regards

  • 0 in reply to Roland Thamm
    Guru 316780 points

    Leakage current is strongly temperature dependent:

    And the datasheet limit incorporates manufacturing variations and a safety factor. If it were possible to guarantee a lower value, TI would already do this.

  • 0 in reply to Clemens Ladisch
    Prodigy 60 points

    Thank you for sending the diagram.

    We are familiar with the caracteristic over temperature.

    Please tell us the unit of the y axes, I doubt the value 95 A at 120 ^C.

    The question is do you have an estimation for the expected value for the part 74LVC1G07 in the production process.

    A measurement of the real current Ioff could also be helpful..

    May be you can give us the distribution of the value Ioff over production.

    Thank you for your support.

    Best regards

  • 0 in reply to Roland Thamm
    TI__Expert 6680 points

    Hi Roland,

    I'm going to reach out to our test team to see if we have any data to share on this. They'll only be able to provide data @ TA = 25C, so I'm not sure how useful it will be to you.

    Again, this data should only be supplemental, and TI cannot guarantee anything other that what's specified on the datasheet.

    Thanks!

    Chad Crosby

  • 0 in reply to Chad Crosby
    TI__Expert 6680 points

    Hi Roland,

    Over the course of 800k observations & many different lots, we found that the Ioff was averaging around 15 to 17nA. The maximum that we observed was 29nA, and the minimum was 0.7nA. These observations were made at 25 degrees C.

    Again, the above data is only supplemental, and TI cannot guarantee anything outside of what's specified in the datasheet.

    Hope this helps! Thanks,

    Chad Crosby

  • 0 in reply to Chad Crosby
    Prodigy 60 points

    Thank you for sending very helpful information. We will discuss the numbers internally.

    Best regards

  • 0 in reply to Chad Crosby
    Prodigy 60 points

    Dear Chad,

    unfortunatly we overlook the test condition for the specification for Ioff. The value Ioff is given for VCC = 0.

    We need the value for the current Id (current into drain of the output transistor) if the output transistor is off, VCC = 3.3V and we have VCC on the output.

    Best regards

  • 0 in reply to Roland Thamm
    TI__Expert 6680 points

    Hi Roland,

    Unfortunately that specification is not something we regularly characterize, and since it isn't specified in the datasheet we won't have any data on it.

    Sorry for any inconvenience,

    Thanks!

    Chad Crosby