I've tried to research the difference between the ATmega328P-PN and the ATmega328P-PU. I've read through the datasheet and done a bunch of searching. I think there is some difference regarding operating temperature range and possibly power consumption.
Now that I can burn my own boot-loaders I wanted to buy some blank ATmega328 chips from Digikey, but have held back because I read something about the "fuse" settings being different between different versions. I'm wanting to burn the Uno or Duemilanove boot-loaders on the chips, it doesn't matter which.
If I could be confident about the correct DigiKey part to order I'd get 25 of them and take advantage of the quantity discount. Thanks for any help in ordering the correct chip.