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NM27C256QE100 参数 Datasheet PDF下载

NM27C256QE100图片预览
型号: NM27C256QE100
PDF下载: 下载PDF文件 查看货源
内容描述: 262,144位( 32K ×8 )高性能CMOS EPROM [262,144-Bit (32K x 8) High Performance CMOS EPROM]
分类和应用: 可编程只读存储器电动程控只读存储器
文件页数/大小: 11 页 / 114 K
品牌: FAIRCHILD [ FAIRCHILD SEMICONDUCTOR ]
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NM27C256 262,144-Bit (32K x 8) High Performance CMOS EPROM
July 1998
NM27C256
262,144-Bit (32K x 8) High Performance CMOS EPROM
General Description
The NM27C256 is a 256K Electrically Programmable Read Only
Memory. It is manufactured in Fairchild’s latest CMOS split gate
EPROM technology which enables it to operate at speeds as fast
as 90 ns access time over the full operating range.
The NM27C256 provides microprocessor-based systems exten-
sive storage capacity for large portions of operating system and
application software. Its 90 ns access time provides high speed
operation with high-performance CPUs. The NM27C256 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 NM27C256 is configured in the standard EPROM pinout
which provides an easy upgrade path for systems which are
currently using standard EPROMs.
The NM27C256 is one member of a high density EPROM Family
which range in densities up to 4 Mb.
Features
s
High performance CMOS
— 90 ns access time
s
JEDEC standard pin configuration
— 28-pin PDIP package
— 32-pin chip carrier
— 28-pin CERDIP package
s
Drop-in replacement for 27C256 or 27256
s
Manufacturer’s identification code
Block Diagram
VCC
GND
VPP
OE
Output Enable
and Chip Enable Logic
CE/PGM
Data Outputs O0 - O7
Output
Buffers
Y Decoder
..
Y Gating
A0 - A14
Address
Inputs
.......
X Decoder
DS010833-1
© 1998 Fairchild Semiconductor Corporation
1
www.fairchildsemi.com