FM27C040 Datasheet, PDF (1/11 Pages) Fairchild Semiconductor – 4,194,304-Bit 512K x 8 High Performance CMOS EPROM

January 2000
FM27C040
4,194,304-Bit (512K x 8) High Performance
CMOS EPROM
General Description
The FM27C040 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 V_PP during read operations allows
memory expansions from 1M to 8 Mbits with no printed circuit
board changes.
The FM27C040 provides microprocessor-based systems exten-
sive storage capacity for large portions of operating system and
application software. Its 120ns access time provides high speed
operation with high-performance CPUs. The FM27C040 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 FM27C040 is manufactured using Fairchild’s advanced CMOS
AMG™ EPROM technology.
Block Diagram
VCC
GND
VPP
OE
CE/PGM
Output Enable,
Chip Enable, and
Program Logic
Features
I High performance CMOS
— 120, 150ns access time*
I Simplified upgrade path
—V_PP is a “Don’t Care” during normal read operation
I Manufacturer’s identification code
I JEDEC standard pin configuration
— 32-pin PDIP
— 32-pin PLCC
— 32-pin CERDIP
*Note: New revision meets 70ns. Please check with factory for availability.
Data Outputs O0 - O7
Output
Buffers
Y Decoder
Y Gating
A0 - A18
Address
Inputs
X Decoder
4,194,304-Bit
Cell Matrix
AMG™ is a trademark of WSI, Inc.
© 1999 Fairchild Semiconductor Corporation
1
FM27C040 Rev. A
DS800033-1
www.fairchildsemi.com