NM27C240 Datasheet, PDF (1/10 Pages) Fairchild Semiconductor – 4,194,304-Bit (256k x 16) High Performance CMOS EPROM

July 1998
NM27C240
4,194,304-Bit (256k x 16) High Performance
CMOS EPROM
General Description
The NM27C240 is a high performance Electrically Programmable
UV erasable ROM (EPROM). It contains 4,194,304 bits config-
ured as 256k x 16 bits. It is offered in both erasable versions for
prototyping and early production applications as well as non-
erasable, plastic packaged versions that are ideal for high volume
and automated assembly applications.
The NM27C240 operates from a single 5V ±10% supply in the
read mode.
The NM27C240 is offered in both DIP and surface mount pack-
ages. The DIP package is a 40-pin dual-in-line ceramic with a
quartz window to allow erasing. The surface mount package is a
44-pin PLCC that is offered in OTP.
This EPROM is manufactured using Fairchild’s proprietary AMG™
EPROM technology for an excellent combination of speed and
economy while providing excellent reliability.
Features
s High performance CMOS
— 100 ns access time
s Fast turn-off for microprocessor compatibility
s Simplified upgrade path
— V_PP and PGM are “Don’t Care” during normal read
operation
s Compatible with 27240 and 27C240 EPROMs
s JEDEC standard pin configuration
— 40-pin DIP package
— 44-pin PLCC package
s Manufacturer’s identification code
s Fast programming algorithm
Block Diagram
Vcc
GND
Vpp
OE
CE/PGM
Output Enable
Chip Enable, and
Program Logic
Data Outputs O0 - O15
Output
Buffers
A0 - A17
Address
Inputs
Y
Decoder
X
Decoder
4,194,304-Bit
Cell Matrix
DS011949-1
AMG™ is a trademark of WSI, Inc.
© 1998 Fairchild Semiconductor Corporation
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