I'm looking into the PIC18F25K80 as a new microcontroller for my company, but ran into an issue with supplier quantities. The PIC18F25K80-I/MM-ND that I originally selected seems to be very hard to find. On both Digikey and Mouser, quantities are limited and lead times are long. But I noticed that Mouser has a large quantity of the PIC18F25K80-E/MM-ND.
When I do a comparison of these 3 microcontrollers, I get almost no difference, and maybe none at all. Mouser says the H/MM has slightly more RAM, while Digikey says the H/MM has a narrower voltage range.
Here is the comparison link on Digikey's site.
What is the actual difference between these 3? They are all 28QFN, are all based on the 18F25K80 chip, but have different pricing and different availability.
And which one is the "main" chip? I'm trying to replace the PIC18F2580 in a large number of our products, but am worried about availability on the 18F25K80 and just want to get a standard 28QFN IC.