National-Semiconductor-NM27C010.pdf
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TL/D/10798
NM27C010 1,048,576-Bit (128K x 8) High Performance CMOS EPROM
January 1994
NM27C010
1,048,576-Bit (128K x 8) High Performance CMOS EPROM
General Description
The NM27C010 is a high performance, 1,048,576-bit Electri-
cally 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 op-
erations 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 V
CC
jumper.
During the normal read operation PGM and V
PP
are in a
‘‘Don’t Care’’ state which allows higher order addresses,
such as A17, A18, and A19 to be connected without affect-
ing the normal read operation. This allows memory up-
grades to 8M bits without hardware changes. The
NM27C010 is also offered in a 32-pin plastic DIP with the
same upgrade path.
The NM27C010 provides microprocessor-based systems
extensive storage capacity for large portions of operating
system and application software. Its 90 ns access time pro-
vides no-wait-state operation with high-performance CPUs.
The NM27C010 offers a single chip solution for the code
storage requirements of 100% firmware-based equipment.
Frequently-used software routines are quickly executed
from EPROM storage, greatly enhancing system utility.
The NM27C010 is manufactured using National’s advanced
CMOS AMG
TM
EPROM technology.
The NM27C010 is one member of a high density EPROM
Family which range in densities up to 4 Megabit.
Features
Y
High performance CMOS
Ð 90 ns access time
Y
Fast turn-off for microprocessor compatibility
Y
Simplified upgrade path
ÐV
PP
and PGM are ‘‘Don’t Care’’ during normal read
operation
Y
Manufacturers identification code
Y
Fast programming
Y
JEDEC standard pin configurations
Ð 32-pin DIP package
Ð 32-pin PLCC package
Ð 32-pin TSOP package
Block Diagram
TL/D/10798–1
TRI-STATE
É
is a registered trademark of National Semiconductor Corporation.
AMG
TM
is a trademark of WSI, Inc.
C
1995 National Semiconductor Corporation RRD-B30M65/Printed in U. S. A.
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