The NM27C256BQ150 is a high-performance 256K (32K x 8) UV Erasable Programmable Read-Only Memory (EPROM) manufactured by National Semiconductor, now Texas Instruments (TI). This EPROM is designed for applications requiring non-volatile storage of data and program code in embedded systems.

Applications

• Embedded Systems: Used for storing firmware and application code in microcontrollers and microprocessors.
• Industrial Control Systems: Employed in programmable logic controllers (PLCs) and other industrial automation equipment.
• Instrumentation: Found in test and measurement equipment for storing calibration data and system parameters.
• Telecommunications: Utilized in communication devices for storing configuration settings and boot code.
• Aerospace and Defense: Suitable for applications requiring reliable non-volatile memory in harsh environments.

Features

• High-Speed Access Time: 150ns access time ensures quick data retrieval.
• UV Erasable: Can be erased and reprogrammed using ultraviolet light, allowing for design iterations and updates.
• Low Power Consumption: Consumes minimal power during operation and standby, extending battery life in portable devices.
• JEDEC Standard Pinout: Compatible with other JEDEC-standard EPROMs, simplifying design and upgrades.
• Three-State Output: Provides a three-state output for easy memory expansion and bus interfacing.
• TTL Compatibility: Fully compatible with TTL logic levels, ensuring seamless integration with other digital components.

Benefits

• Flexibility: UV erasability allows for easy reprogramming and design changes, reducing development time and costs.
• Reliability: Provides reliable non-volatile storage, ensuring data retention even when power is lost.
• Performance: High-speed access time ensures fast data retrieval, improving system performance.
• Ease of Integration: JEDEC standard pinout and TTL compatibility simplify design and integration with other components.
• Cost-Effectiveness: Offers a cost-effective solution for non-volatile storage in a wide range of applications.

Additional Details

The NM27C256BQ150 operates on a single 5V power supply and is available in a ceramic DIP package. It features automatic power-down, reducing power consumption when not actively being accessed. The device also includes protection circuitry to prevent damage from electrostatic discharge (ESD) and overvoltage conditions. The operating temperature range is typically from 0°C to +70°C.