The X28C256DI15 is a 256Kbit (32K x 8) EEPROM (Electrically Erasable Programmable Read-Only Memory) manufactured by Xicor Inc. (later acquired by Intersil, then Renesas). It's a non-volatile memory device that can be electrically erased and reprogrammed, allowing for flexible data storage in various electronic systems. The "15" likely indicates an access time of 150ns.

Applications:

• Storage of configuration data in industrial control systems.
• Firmware storage in embedded systems.
• Data logging in instrumentation and measurement devices.
• Storage of user preferences in consumer electronics.
• Calibration data storage in test equipment.
• BIOS storage in older computer systems.

Features:

• 256Kbit (32K x 8) EEPROM: Provides non-volatile storage for program code and data.
• Electrically Erasable and Programmable: Allows for in-system reprogramming.
• Fast Access Time: Enables quick data retrieval.
• Low Power Consumption: Suitable for battery-powered applications.
• JEDEC Standard Pinout: Simplifies board layout and design.
• Automatic Page Write Operation: Speeds up write operations.
• Data Polling: Allows for verification of write completion.

Benefits:

• Flexible Data Storage: Enables easy updates and modifications of stored data.
• Non-Volatile Memory: Retains data even when power is removed.
• Reliable Performance: Provides consistent and dependable operation.
• Simplified Design: Easy to integrate into existing systems.
• Cost-Effective Solution: Offers a low-cost solution for non-volatile memory storage.
• In-System Programmability: Allows for remote updates and configuration changes.

Additional Details:

The X28C256DI15 EEPROM operates on a single 5V power supply and is available in a DIP (Dual In-line Package). Its fast access time makes it suitable for applications requiring quick data retrieval. The device's automatic page write operation simplifies the programming process and reduces write times. Data polling can be used to verify that a write operation has been completed successfully. The X28C256DI15 is often used in applications where data needs to be retained even when power is lost, such as storing configuration settings, calibration data, or firmware code. It has been a reliable and widely used memory device for many years. This part is considered legacy and newer designs may utilize more modern non-volatile memory options.