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NMC27C256Q-250 from NS,National Semiconductor

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NMC27C256Q-250

Manufacturer: NS, NSC

250 ns, Vcc=5V+/-10%, 262,144-bit (32k x 8) UV erasable CMOS PROM

Partnumber Manufacturer Quantity Availability
NMC27C256Q-250,NMC27C256Q250 NS, NSC 6160 In Stock

Description and Introduction

250 ns, Vcc=5V+/-10%, 262,144-bit (32k x 8) UV erasable CMOS PROM The **NMC27C256Q-250** is a high-performance **256Kbit (32K x 8) UV-erasable programmable read-only memory (EPROM)** designed for applications requiring reliable, non-volatile data storage. Manufactured with advanced CMOS technology, this component offers fast access times and low power consumption, making it suitable for embedded systems, industrial controls, and legacy computing applications.  

Featuring a **250ns access time**, the NMC27C256Q-250 ensures efficient data retrieval, while its **single 5V power supply** simplifies integration into various circuit designs. The device supports **standard EPROM programming protocols**, allowing for easy in-system updates when exposed to ultraviolet light for erasure. Its **tri-state output** enables direct interfacing with microprocessors and bus-oriented systems.  

With a **wide operating temperature range**, this EPROM maintains stability in demanding environments. The **28-pin DIP (Dual In-line Package)** provides a robust and industry-standard footprint, ensuring compatibility with existing designs.  

Engineers and developers value the NMC27C256Q-250 for its **durability, fast performance, and ease of reprogramming**, making it a dependable choice for applications where firmware or critical data must be preserved without power. Its legacy support and proven reliability continue to make it relevant in specialized and industrial electronics.

Application Scenarios & Design Considerations

250 ns, Vcc=5V+/-10%, 262,144-bit (32k x 8) UV erasable CMOS PROM

Alternative Part Number

  • M27C256B-25F1 --: Pin-compatible 256Kbit UV EPROM with 250ns access time, widely available and a direct functional replacement.
  • AM27C256-250DC --: Equivalent 32K x 8 CMOS EPROM with 250ns speed grade, same JEDEC pinout and compatible programming.
  • TMS27C256-25JL --: 256Kbit EPROM with 250ns access time, pin-compatible with the original and suitable as a drop-in substitute.

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