EPROM Question

[Tony Duell]

> 
> I've been trying to google up an answer, but have had no luck.  What is the
> difference between a 27256 and a 27C256 EPROM?  Can a 27C256 EPROM be
> substituted for a 27256?


The 27C256 is CMOS, the 27256 is NMOS.

The former has a lower power consumptiom than the latter, and there may 
be differnces in the access times, but they're pretty similar devices. I 
would be suprised if there was a circuit hat would work with the latter 
but not the former. 

-tony