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NMC27C256Q250 from NSC,National Semiconductor

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NMC27C256Q250

Manufacturer: NSC

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

Partnumber Manufacturer Quantity Availability
NMC27C256Q250 NSC 100 In Stock

Description and Introduction

250 ns, Vcc=5V+/-10%, 262,144-bit (32k x 8) UV erasable CMOS PROM # Introduction to the NMC27C256Q250  

The **NMC27C256Q250** is a high-performance **256K (32K x 8) UV-erasable programmable read-only memory (EPROM)** designed for applications requiring reliable non-volatile storage. With a fast access time of **250 ns**, this component is well-suited for embedded systems, industrial controls, and legacy computing applications where firmware storage is critical.  

Featuring a **single 5V power supply**, the NMC27C256Q250 ensures compatibility with standard TTL logic levels, simplifying integration into existing designs. Its **UV-erasable** nature allows for multiple reprogramming cycles, making it a flexible choice during development and prototyping. The chip employs a **JEDEC-standard pinout**, ensuring interchangeability with similar EPROMs in the 27C256 series.  

Key characteristics include a **wide operating temperature range**, robust data retention, and low power consumption in standby mode. The device is housed in a **ceramic or plastic DIP package**, providing durability for industrial environments.  

While modern systems increasingly use flash memory, the NMC27C256Q250 remains relevant in applications requiring proven reliability, radiation resistance, or backward compatibility with older hardware. Its performance and longevity make it a dependable solution for long-term firmware storage.

Application Scenarios & Design Considerations

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

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