NMC27C64Q150 NMOS 64K (8K x 8) 150ns UV EPROM IC DIP-28

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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 Datasheet