Thank you for reading this…..

I a wondering about protection for the PIC port if I am using a Dallas iButton device. I have seen circuits using a 33R resistor in series and a FR107 Fast recover diode across the probe. And another up to the supply rail.

My question is why the use (specific) of a fast recovery diode… Will a ordinary or even a Schottky diode be the same …..Is there a reason ?

Sorry if posted in wrong place.