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NMC27C256Q25 from NS,National Semiconductor

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NMC27C256Q25

Manufacturer: NS

250 ns, Vcc=5V+/-5%, 262,144-bit (32k x 8) UV erasable CMOS PROM

Partnumber Manufacturer Quantity Availability
NMC27C256Q25 NS 35 In Stock

Description and Introduction

250 ns, Vcc=5V+/-5%, 262,144-bit (32k x 8) UV erasable CMOS PROM The **NMC27C256Q25** is a high-performance **UV-erasable programmable read-only memory (EPROM)** designed for applications requiring reliable, non-volatile data storage. With a capacity of **256 kilobits (32K x 8 bits)**, this component offers a robust solution for firmware storage, embedded systems, and legacy computing applications.  

Operating at a **250-nanosecond access time**, the NMC27C256Q25 ensures efficient data retrieval, making it suitable for timing-critical systems. It features a **single 5V power supply**, simplifying integration into various digital circuits. The device supports **standard EPROM programming protocols**, allowing for easy reprogramming after UV erasure, which typically takes **15–20 minutes** under optimal conditions.  

Encased in a **ceramic or plastic DIP package**, the NMC27C256Q25 provides durability and compatibility with traditional through-hole PCB designs. Its **wide operating temperature range** ensures stability in industrial and consumer electronics environments.  

While newer flash memory technologies have largely replaced EPROMs in modern designs, the NMC27C256Q25 remains relevant for **retro computing, industrial control systems, and applications requiring long-term data retention without power**. Its reliability and ease of use make it a trusted choice for engineers working with legacy hardware.  

For those maintaining or restoring older systems, this component offers a dependable, time-tested solution for non-volatile memory needs.

Application Scenarios & Design Considerations

250 ns, Vcc=5V+/-5%, 262,144-bit (32k x 8) UV erasable CMOS PROM

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