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CD74AC14: CD74AC14

Intellectual 630 points

Replies: 4

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Part Number: CD74AC14

Hi

CD74AC14 mentions that it can:

" Operate With Much Slower Than Standard Input Rise and Fall Slew Rates "

What is max dT/dV for any of its Input in terms of nS per Volt?

I am not able to locate in the Data Sheet, please.

Regards

Varun

  • Schmitt-trigger inputs do not have an upper limit on the rise/fall time.

  • In reply to Clemens Ladisch:

    Clemens 

    Many thanx for your quick reply.

    Is the above Stt universally valid across the spectrum of

    Schmitt Triggers including 74AC14 & 74LVC family?

    Someone from TI had informed me in the past that only

    CD40106 was well suited to accept slow-moving Inputs.

    If I were to feed a 0-5 V Ramp to say 74LVC2G14, what is 

    peak Input current could I expect?

    Thanks and regards

    Varun

  • In reply to Varunesh Kumar:

    This is true for Schmitt-trigger devices (74xx14/17/97 etc.) in all logic families.

    CD4000 and CD74HC are different families.

    CMOS inputs always have high impedance; the input current does not increase. However, for input voltages that are not near the rails, the supply current increases. The curve looks similar to the ones shown here, but I have not been able to find this information for the LVC family.

  • In reply to Clemens Ladisch:

    Many thanks for your quick replies.

    Best Regards

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