General Description
The NM27C010 is a high performance, 1,048,576-bit Electrically
Programmable UV Erasable Read Only Memory. It is organized as
128K-words of 8 bits each. Its pin-compatibility with byte-wide
JEDEC EPROMs enables upgrades through 8 Mbit EPROMs. The “Don’t
Care” feature during read operations allows memory expansions from
1M to 8M bits with no printed circuit board changes.
The NM27C010 can directly replace lower density 28-pin EPROMs by
adding an A16 address line and VCC jumper. During the normal read
operation PGM and VPP are in a “Don’t Care” state which allows
higher order addresses, such as A17, A18, and A19 to be connected
without affecting the normal read operation. This allows memory
upgrades to 8M bits without hardware changes. The NM27C010 is also
offered in a 32-pin plastic DIP with the same upgrade path.
Features
■ High performance CMOS
—70 ns access time
■ Fast turn-off for microprocessor compatibility
■ Simplified upgrade path
—VPP and PGM are “Don’t Care” during normal read operation
■ Manufacturers identification code
■ Fast programming
■ JEDEC standard pin configurations
—32-pin PDIP package
—32-pin PLCC package
—32-pin CERDIP package
