I am making a board that will run off of a 3.3V supply (because one IC has a max 3.6V supply). I have the SparkFun pocket programmer that runs off of 5V usb. Will I be able to program my atmel IC that is running off of 3.3V with the SparkFun pocket programmer? From what I can tell, the attiny2313 on the programmer has a 5V supply, and therefore 5V outputs. The 74ACT125 can be supplied by the target, but it’s max input rating is .5V above it’s VCC, so while I could supply this IC with 3.3V to match the supply for the attiny48 that I am programming, it would break the 74ACT125. Is that correct, or is there something I’m missing?
I guess I could just add a jumper to my board to disable the supply for the IC that can’t take 5V, but I figured I would check here first to see if I can avoid it.
Thanks,
John