SN751178NS input specification

Hello,

D and DE are inputs. Are you looking for spec that details the maximum allowable rise and fall in order to read a bit?

Thanks,
Andrew

Hi Andrew

Thank you for your comment.

Yes. We want to know the the maximum allowable rise and fall spec of input if it has.

regards

Na,

There is no maximum limit for input voltage slew rate.
Is there is specific reason for the concern?

Hi Ronald

Thank you for your reply.

In fact, we connect the secondary side of the photocoupler to DE pin.
The rise and fall time is 30ns typically, so we wanted to confirm whether it is capable or not.

regard

Hi Ronald

Thank you for your help.

regards.

Hi Ronald

Could you answer the additional question?

There is no maximum limit for input voltage slew rate.
So, can we consider it will be OK even if the input rises / falls more slowly ( typical 7 us)?
Do you have something concerned?

regards

Na,

For slow edge times, there may be a risk for output glitches during part of the edge time.
I don't know if the logic inputs have any hysteresis.