General Description
The NM27C040 is a high performance, 4,194,304-bit Electrically Programmable UV Erasable Read Only Memory. It is organized as 512K words of 8 bits each. Its pin-compatibility with byte-wide JEDEC EPROMs enables upgrades through 8 Mbit EPROMs. The “Don’t Care” feature on VPP during read operations allows memory expansions from 1M to 8 Mbits with no printed circuit board changes.

FEATUREs
■ High performance CMOS
    —120, 150ns access time*
■ Simplified upgrade path
    —VPP is a “Don’t Care” during normal read operation
■ Manufacturer’s identification code
■ JEDEC standard pin configuration
    —32-pin PDIP
    —32-pin PLCC
    —32-pin CERDIP