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 extensive 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.

FEATUREs
■ High performance CMOS
   —90 ns access time
■ JEDEC standard pin configuration
   — 28-pin PDIP package
   — 32-pin chip carrier
   — 28-pin CERDIP package
■ Drop-in replacement for 27C256 or 27256
■ Manufacturer’s identification code