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NM27C256Q-200

Manufacturer: NS

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

Partnumber Manufacturer Quantity Availability
NM27C256Q-200,NM27C256Q200 NS 5382 In Stock

Description and Introduction

256K-Bit (32K x 8) High Performance CMOS EPROM The **NM27C256Q-200** is a high-performance **32K x 8-bit (256Kbit) UV-erasable and electrically programmable read-only memory (EPROM)**. Designed for applications requiring non-volatile storage, this component offers reliable data retention and fast access times, making it suitable for embedded systems, industrial controls, and legacy computing applications.  

Operating at **5V**, the NM27C256Q-200 features a **200ns access time**, ensuring efficient performance in time-critical environments. Its **JEDEC-standard pinout** ensures compatibility with industry-standard EPROMs, simplifying integration into existing designs. The device supports **byte-wide programming**, allowing flexible data updates via a standard EPROM programmer.  

One of its key features is **UV-erasability**, enabling complete data erasure under ultraviolet light for reprogramming. This makes it ideal for development and prototyping where multiple iterations are necessary. The NM27C256Q-200 also includes a **chip enable input** for power-saving standby modes, reducing overall system power consumption.  

Encased in a **ceramic DIP package**, the component ensures durability and thermal stability, suitable for extended industrial use. While newer flash memory technologies have largely replaced EPROMs in modern designs, the NM27C256Q-200 remains a dependable choice for legacy systems requiring robust, reprogrammable non-volatile memory.  

This EPROM continues to serve specialized applications where reliability and reprogrammability are essential.

Application Scenarios & Design Considerations

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

Alternative Part Number

  • M27C256B-20F1 --: 256Kbit (32K x 8) UV EPROM with 200 ns access time, pin-compatible DIP-28 pinout and same 5V programming scheme as the original.
  • AT27C256R-20PU --: 256Kbit OTP EPROM, 200 ns speed grade, DIP-28 package, functionally equivalent read timing and pinout for direct board replacement.
  • TMS27C256-20JL --: 256Kbit CMOS EPROM with 200 ns access time in 28-pin DIP, compatible address/data and control signals for drop-in substitution.
  • AM27C256-200DC --: 256Kbit CMOS EPROM with 200 ns access time, same JEDEC 28-pin pinout, suitable drop-in alternative.

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