The NM27C256Q-250 is a 256K (32K x 8) UV Erasable Programmable Read-Only Memory (EPROM) manufactured by National Semiconductor, now Texas Instruments (TI). It provides a non-volatile storage solution suitable for embedded systems and various electronic applications.

Applications

• Embedded Systems: Storing firmware and boot code in microcontrollers and embedded processors.
• Industrial Automation: Used in programmable logic controllers (PLCs) for storing control algorithms and configuration data.
• Instrumentation: Storing calibration parameters and system settings in test and measurement equipment.
• Telecommunications: Employed in communication devices for storing configuration data and software.
• Automotive Electronics: Used in engine control units (ECUs) and other automotive systems for storing critical data.

Features

• 256K Memory Capacity: Provides ample storage for firmware, configuration data, and other non-volatile information.
• UV Erasable: Allows for reprogramming and design changes by erasing the memory with ultraviolet light.
• 250ns Access Time: Offers a fast access time for quick data retrieval.
• JEDEC Standard Pinout: Compatible with industry-standard EPROM pinouts for easy integration and replacement.
• Three-State Output: Provides a three-state output for easy interfacing with microprocessor systems.
• TTL Compatible: Compatible with standard TTL logic levels for seamless integration with digital circuits.

Benefits

• Flexibility: UV erasability allows for easy reprogramming, enabling design iterations and software updates.
• Reliability: Provides reliable non-volatile storage, ensuring data retention even in the absence of power.
• Performance: Fast access time ensures quick data retrieval, contributing to overall system performance.
• Easy Integration: JEDEC standard pinout simplifies integration into existing and new designs.
• Cost-Effective: Provides a cost-effective solution for non-volatile memory requirements.

Additional Details

The NM27C256Q-250 operates on a single 5V power supply and is typically available in a ceramic DIP package. It is designed to be highly reliable and offers good noise immunity. The EPROM also features a low-power standby mode to reduce power consumption when not actively being accessed. The typical operating temperature range is 0°C to +70°C.