27C128 128K 150ns CMOS EPROM – Datasheet

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The M27C128 is a high-performance 128K UV Erasable Electrically Programmable Read-Only Memory. It is manufactured with National’s latest CMOS split-gate EPROM technology which enables it to operate at speeds as fast as 100 ns access time over the full operating range. The NM27C128 provides microprocessor-based systems extensive storage capacity for large portions of operating system and application software. Its 100ns access time provides high-speed operation with high-performance CPUs.

The NM27C128 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 NM27C128 is configured in the standard EPROM pinout which provides an easy upgrade path for systems that are currently using standard EPROMs.

27C128 Pinout

27C128 Pin Configuration

Pin NumberPin NoDescription
1VPPProgramming Supply
2A12 Address Input
3A7 Address Input
4A6 Address Input
5A5 Address Input
6A4 Address Input
7A3 Address Input
8A2 Address Input
9A1 Address Input
10A0 Address Input
11O0 Data Output
12O1 Data Output
13O2 Data Output
14GND Ground Pin
15O3 Data Output
16O4 Data Output
17O5 Data Output
18O6 Data Output
19O7 Data Output
20CE Chip Enable
21A10 Address Input
22OE’ Output Enable
23A11 Address Input
24A9 Address Input
25A8 Address Input
26A13Address Input
27PGMProgramming Pin
28Vcc Positive Power Supply

27C128 Key Features

  • High-performance CMOS
    • 100 ns access time
  • Fast turn-off for microprocessor compatibility
  • JEDEC standard pin configuration
    • 28-pin DIP package
    • 32-pin chip carrier
  • Drop-in replacement for 27C128 or 27128

You can download this datasheet for 27C128 128K 150ns CMOS EPROM – Datasheet from the link given below: