The D28F256-250P1C2 is a 256K (32K x 8) Flash Memory device manufactured by Intel. It's designed for non-volatile storage in embedded systems, offering electrically erasable and programmable capabilities for firmware, code, and data storage. The 250 in the part number indicates an access time of 250ns. This device allows in-system updates, providing flexibility for software revisions and feature enhancements.

Applications:

• Embedded Systems
• Microcontroller Firmware Storage
• Industrial Control Systems
• Networking Equipment
• Data Logging Devices
• Programmable Logic Controllers (PLCs)

Features:

• 256 Kbit (32K x 8) Organization: Provides a substantial amount of non-volatile storage.
• Fast Access Time: 250ns access time enables rapid data retrieval.
• Electrically Erasable and Programmable: Allows for easy in-system reprogramming.
• Single 5V Power Supply: Operates on a single 5V supply, simplifying system design.
• TTL Compatible Inputs/Outputs: Ensures easy integration with standard logic circuits.
• High Endurance: Supports a large number of erase/program cycles.
• Data Retention: Offers long-term data retention, ensuring data integrity even without power.

Benefits:

• Flexible Firmware Updates: In-system programming capability simplifies firmware updates and maintenance.
• Fast Data Access: The fast access time ensures quick code execution and data retrieval, improving system performance.
• Reliable Non-Volatile Storage: Retains data even when power is off, preventing data loss.
• Easy System Integration: TTL compatibility simplifies integration with other system components.
• Robust Performance: High endurance and long data retention ensure reliable operation in demanding environments.

Additional Details:

The D28F256-250P1C2 is commonly packaged in a DIP or PLCC package. It typically features control signals such as Chip Enable (CE), Output Enable (OE), and Write Enable (WE) to manage memory access and programming. Erasing and programming operations require specific voltage and timing conditions, as defined in the device datasheet. It's crucial to adhere to the manufacturer's specifications to ensure proper operation and data integrity. This parallel flash memory device is often used for storing boot code and application code in embedded systems.