The -2 to 7 volt range you talk about is the "absolute maximum" range for the part. This is not the recommended voltage range. If the EPROM part is recommended for 3.3V then it must be run at that voltage.

But please stop and consider something here......

By the time you just even accumulate the extra parts to build up a circuit with your relic AMD 8052s and these 3.3V EPROMS you will easily have spent the cost differential to have just looked around and purchased one of the numerous 8051 derivative parts that has in-system re-programmable FLASH on board. A SINGLE chip costing a few $$$ will get you into programming and making your project, whatever it is, rather than building a much larger PC board with your existing stuff. As I see it the AMD 8052 and SST EPROM setup will require two power sources, plus an additional four or five chips that translate the 5 volts to 3.3volts and back again. Plus after you get that all built, assuming your pretty handy with a soldering iron, you will still need to program your EPROM somehow and all code development will follow the "burn and learn" methodology.

If you are looking to exercise your soldering iron, spend money on 20 pin logic ICs, and screw around with an EPROM programmer then by all means go ahead and build up with these parts. On the other hand if you have a project or controller development your trying to get into to make something useful then I would strongly encourage you to look at modern day parts and tools. For example...look at these eval boards from SiLabs. Here for $99 US you can get a module that you can be writing and DEBUGGING code with, using the included evaluation C compiler and Assembler, almost in the same day that you open the box!!!

Michael Karas