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NM27C256QE-150 from NS,National Semiconductor

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NM27C256QE-150

Manufacturer: NS, NSC

256K-Bit (32K x 8) High Performance CMOS EPROM

Partnumber Manufacturer Quantity Availability
NM27C256QE-150,NM27C256QE150 NS, NSC 6192 In Stock

Description and Introduction

256K-Bit (32K x 8) High Performance CMOS EPROM # Introduction to the NM27C256QE-150  

The **NM27C256QE-150** is a high-performance **256K-bit (32K x 8) UV-erasable programmable read-only memory (EPROM)** designed for applications requiring non-volatile data storage. Operating at a **150ns access time**, this component provides reliable and fast read operations, making it suitable for embedded systems, industrial controls, and legacy computing applications.  

Featuring a **single 5V power supply**, the NM27C256QE-150 ensures compatibility with standard TTL logic levels, simplifying integration into existing circuit designs. Its **UV-erasable** capability allows for multiple reprogramming cycles, offering flexibility during development and testing phases.  

The device is housed in a **32-pin ceramic DIP (Dual In-line Package)**, ensuring durability and ease of handling. With a **wide operating temperature range**, it performs reliably in various environmental conditions.  

Key features include:  
- **256K-bit (32K x 8) organization**  
- **150ns access time**  
- **Low power consumption**  
- **TTL-compatible inputs and outputs**  
- **UV-erasable and reprogrammable**  

The NM27C256QE-150 remains a dependable choice for engineers working with legacy systems or applications requiring robust, non-volatile memory solutions. Its combination of speed, reliability, and reprogrammability makes it a versatile component in electronic design.

Application Scenarios & Design Considerations

256K-Bit (32K x 8) High Performance CMOS EPROM

Alternative Part Number

  • M27C256B-15F1 --: 256Kbit (32K x 8) UV EPROM with 150 ns access time, pin-compatible DIP-28 pinout and same 5V supply, widely available as a direct functional replacement.
  • AT27C256R-15PU --: 256Kbit OTP EPROM with 150 ns speed grade in a 28-pin DIP package, matching the original density, access time and interface for drop-in use.
  • TMS27C256-15JL --: 256Kbit UV EPROM with 150 ns access time and standard 28-pin JEDEC pinout, offering equivalent read timing and supply requirements as a second-source option.

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