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NMC27C256Q20 from NSC,National Semiconductor

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NMC27C256Q20

Manufacturer: NSC, NS

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

Partnumber Manufacturer Quantity Availability
NMC27C256Q20 NSC, NS 81 In Stock

Description and Introduction

200 ns, Vcc=5V+/-5%, 262,144-bit (32k x 8) UV erasable CMOS PROM The **NMC27C256Q20** is a high-performance **256Kbit (32K x 8) UV-erasable programmable read-only memory (EPROM)** designed for applications requiring reliable non-volatile data storage. This component features a fast **200ns access time**, making it suitable for systems where quick data retrieval is essential.  

Built with **CMOS technology**, the NMC27C256Q20 offers low power consumption while maintaining robust performance. It operates on a **single 5V power supply**, simplifying integration into various digital systems. The device supports **standard EPROM programming voltages** (12.5V for programming), ensuring compatibility with conventional development tools.  

With a **wide temperature range** and durable design, this EPROM is well-suited for industrial, automotive, and embedded applications. Its **28-pin DIP (Dual In-line Package)** provides a familiar footprint for easy PCB mounting.  

The NMC27C256Q20 is **UV-erasable**, allowing multiple reprogramming cycles, which is advantageous during firmware development and testing. Once programmed, data remains stable for extended periods, even in demanding environments.  

For engineers and designers seeking a dependable **non-volatile memory solution**, the NMC27C256Q20 offers a balance of speed, power efficiency, and durability, making it a practical choice for legacy and modern systems alike.

Application Scenarios & Design Considerations

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

Alternative Part Number

  • M27C256B-20F1 --: Pin-compatible 256Kbit UV EPROM with 200ns access time, direct functional replacement for the NMC27C256Q20.
  • AM27C256-200DC --: Equivalent 32K x 8 CMOS EPROM with 200ns speed grade, widely used as a second source for 27C256 devices.
  • TMS27C256-20JL --: 256Kbit UV-erasable EPROM with matching 200ns access time and JEDEC pinout, suitable drop-in alternative.

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