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NM27C040V-120 from NSC,National Semiconductor

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NM27C040V-120

Manufacturer: NSC, NS

4,194,304 Bit (512K x 8) High Performance CMOS EPROM

Partnumber Manufacturer Quantity Availability
NM27C040V-120,NM27C040V120 NSC, NS 62 In Stock

Description and Introduction

4,194,304 Bit (512K x 8) High Performance CMOS EPROM The **NM27C040V-120** is a high-performance **4-megabit (512K x 8) UV-erasable programmable read-only memory (EPROM)** designed for applications requiring reliable, non-volatile data storage. Operating at a **120ns access time**, this component is well-suited for embedded systems, industrial controls, and legacy computing applications where fast and dependable memory access is essential.  

Fabricated with advanced CMOS technology, the NM27C040V-120 offers **low power consumption** while maintaining robust performance. It features a **single 5V power supply**, simplifying integration into existing designs. The device supports **standard EPROM programming protocols**, ensuring compatibility with widely available programming equipment.  

One of its key characteristics is its **UV-erasability**, allowing the memory to be wiped and reprogrammed multiple times, making it ideal for development and prototyping phases. The NM27C040V-120 is packaged in a **32-pin DIP (Dual In-line Package)**, providing ease of handling and insertion in through-hole PCB designs.  

With its **wide operating temperature range**, this EPROM is suitable for demanding environments. While newer flash memory technologies have largely replaced EPROMs in modern applications, the NM27C040V-120 remains a dependable choice for systems requiring proven, long-term data retention and reprogrammability.

Application Scenarios & Design Considerations

4,194,304 Bit (512K x 8) High Performance CMOS EPROM

Alternative Part Number

  • M27C4001-12F1 --: 4 Mbit UV EPROM with similar 120 ns access time and DIP-32 pinout, a well-established drop-in replacement for the NM27C040.
  • AM27C040-120DC --: 4 Mbit CMOS EPROM with 120 ns speed grade and compatible pinout, widely available as a second-source equivalent.
  • TMS27C040-12JL --: 4 Mbit EPROM offering 120 ns access time and DIP-32 package, suitable as a functional alternative to the NSC device.

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