NMC27C64Q150 NMOS 64K (8K x 8) 150ns UV EPROM IC DIP-28
The NMC27C64Q150 is a 64K-bit (8K × 8) UV-erasable EPROM implemented in NMOS technology and supplied in a 28-pin DIP package. Designed as a non-volatile program/data store for legacy and embedded systems, this device provides straightforward maskless reprogramming via ultraviolet exposure and is optimized for systems that require simple, low-cost firmware storage with 150 ns access timing.
Internally organized as 8,192 bytes in an 8-bit-wide memory array, the NMC27C64Q150 offers parallel data access with standard asynchronous bus timing suitable for microprocessors and microcontrollers of the TTL/CMOS era. The part is unglamorously robust: a classic EPROM offering predictable read behaviour, easy in-circuit replacement, and long data retention when properly handled and stored.
Mechanically the device is commonly supplied in the through-hole DIP-28 package for easy prototyping and board-level replacement. Programming is performed externally (VPP programming) and erased by exposing the quartz window (if fitted) to UV light a familiar workflow for vintage/maintenance environments and low-volume production where programmability without mask changes is desirable.
Features:
- 64 Kbit memory arranged as 8K × 8.
- 150 ns access time.
- NMOS process technology.
- UV-erasable, electrically programmable EPROM.
- Standard 28-pin DIP package for easy socketing and replacement.
- Parallel 8-bit data bus with asynchronous timing compatible with legacy microprocessors.
Specifications:
| Specification: | Value: |
|---|---|
| Part number: | NMC27C64Q150 |
| Memory organization: | 64 Kbit (8K × 8) |
| Access time: | 150 ns |
| Memory type: | UV-erasable EPROM (EPROM) |
| Technology: | NMOS |
| Package: | 28-pin DIP (DIP-28) |
| VCC (read supply): | 5 V |
| Programming / VPP: | External programming voltage required |
| Data retention / Endurance: | EPROM data retention and endurance apply |
Pinout & Connection Diagram:
Applications:
- Legacy Computer BIOS Storage.
- Retro Gaming Console Cartridges.
- Industrial Machine Firmware.
- Vintage Automotive ECU Programs.
- Early Telecommunications Equipment.
- Microcontroller Program Storage (External).
- Educational/Development Systems.
- Firmware for Obsolete Test Equipment.
- Peripheral Device Control ROM.
- Archival Data Storage.
Package Contents:
- 1x NMC27C64Q150 NMOS 64K (8K x 8) 150ns UV EPROM IC DIP-28
