NM27C256

NM27C256 262 144-Bit (32K x 8) High Performance CMOS EPROM December 1993 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 National’s latest CMOS split gate EPROM technology which enables it to operate at speeds as fast as 120 ns access time over the full operating range The NM27C256 provides microprocessor-based systems extensive storage capacity for large portions of operating system and application software Its 120 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 Y Y Y Y High performance CMOS 120 ns access time JEDEC standard pin configuration 28-pin DIP package 32-pin chip carrier Drop-in replacement for 27C256 or 27256 Manufacturer’s identification code Block Diagram TL D 10833 – 1 TRI-STATE is a registered trademark of National Semiconductor Corporation HPCTM is a trademark of National Semiconductor Corporation C1995 National Semiconductor Corporation TL D 10833 RRD...