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