General Description
The NM27C240 is a high performance Electrically Programmable UV erasable ROM (EPROM). It contains 4,194,304 bits configured as 256k x 16 bits. It is offered in both erasable versions for prototyping and early production applications as well as nonerasable, plastic packaged versions that are ideal for high volume and automated assembly applications.

FEATUREs
■ High performance CMOS
    — 100 ns access time
■ Fast turn-off for microprocessor compatibility
■ Simplified upgrade path
    — VPP and PGM are “Don’t Care” during normal read
    operation
■ Compatible with 27240 and 27C240 EPROMs
■ JEDEC standard pin configuration
    — 40-pin DIP package
    — 44-pin PLCC package
■ Manufacturer’s identification code
■ Fast programming algorithm