CD74AC14: CD74AC14

Varunesh Kumar

Intellectual 950 points

Part Number: CD74AC14

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

over 5 years ago

0 Clemens Ladisch over 5 years ago

Guru 317800 points

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

0 Varunesh Kumar over 5 years ago in reply to Clemens Ladisch

Intellectual 950 points

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

0 Clemens Ladisch over 5 years ago in reply to Varunesh Kumar

Guru 317800 points

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.

0 Varunesh Kumar over 5 years ago in reply to Clemens Ladisch

Intellectual 950 points

Many thanks for your quick replies.

Best Regards

Logic

Logic forum

CD74AC14: CD74AC14