ISO6742: Schmitt Trigger Inputs? Maximum Risetime?

Hi Chris,

Thanks for reaching out.

Yes, the input of most of our digital isolators are Schmitt trigger inputs including the ISO6742. One way to identify if the inputs are Schmitt trigger inputs is by looking to see if the input thresholds have a hysteresis. I am copying below a screenshot of datasheet showing input thresholds along with hysteresis.

There is no restriction on the input signal rise time to ISO6742 inputs. The signal rise time can be as fast or slow as it can be, there is no upper or lower limit. Thanks.

Regards,
Koteshwar Rao