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 Number | Pin No | Description |
---|---|---|
1 | VPP | Programming Supply |
2 | A12 | Address Input |
3 | A7 | Address Input |
4 | A6 | Address Input |
5 | A5 | Address Input |
6 | A4 | Address Input |
7 | A3 | Address Input |
8 | A2 | Address Input |
9 | A1 | Address Input |
10 | A0 | Address Input |
11 | O0 | Data Output |
12 | O1 | Data Output |
13 | O2 | Data Output |
14 | GND | Ground Pin |
15 | O3 | Data Output |
16 | O4 | Data Output |
17 | O5 | Data Output |
18 | O6 | Data Output |
19 | O7 | Data Output |
20 | CE | Chip Enable |
21 | A10 | Address Input |
22 | OE’ | Output Enable |
23 | A11 | Address Input |
24 | A9 | Address Input |
25 | A8 | Address Input |
26 | A13 | Address Input |
27 | PGM | Programming Pin |
28 | Vcc | 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: