Hi, After many years in the 5 volt world, I'm making my first tentative steps into FPGAs, which tend to deal with lower voltages. It seems that below 5 volts, things aren't as clear, there are references to 3.3volts, 2.5 volts and even lower. Unlike 5V families, which are clearly specified to run at that voltage, the lower voltage stuff seems to be specified with a much wider supply range.
Is there a web reference that someone oculde suggest that clarifies the situation, my browsing so far hasn't come up with anything particularly clear. Ideally, there'd be a standard that covers glue logic such as gates and buffers, and interface devices such as ADCs, that interfaces cleanly to FPGAs specified for 3.3V connectivity. A level translator that goes between
3.3 and 5 would also be nice.Any assistance appreciated.