The X28256DMB25 is a 256K (32K x 8) EEPROM (Electrically Erasable Programmable Read-Only Memory) manufactured by Xicor Inc. This non-volatile memory device is designed for applications requiring in-system programmability and data retention even when power is removed. It is commonly used in embedded systems, data logging applications, and other applications where persistent data storage is necessary.

Applications

• Embedded systems: Storing configuration data, calibration parameters, and firmware.
• Data logging: Storing sensor data, event logs, and other data that needs to be retained.
• Industrial control: Storing program code and data for programmable logic controllers (PLCs).
• Consumer electronics: Storing user preferences, settings, and game save data.
• Automotive electronics: Storing vehicle configuration data and diagnostic information.

Features

• 256K (32K x 8) memory capacity: Stores 32,768 bytes of data.
• Electrically erasable and programmable: Allows in-system programming and reprogramming.
• Non-volatile memory: Retains data even when power is removed.
• Fast access time: Provides fast read and write access to memory locations.
• Page write mode: Allows writing multiple bytes in a single operation.
• Self-timed write cycle: Simplifies write operations by automatically timing the write cycle.

Benefits

• In-system programmability: Allows updating the memory content without removing the device from the system.
• Data retention: Ensures that data is preserved even when power is lost.
• Fast access time: Enables quick read and write operations, improving system performance.
• Simplified system design: Integrated features simplify memory management and control.
• Increased system flexibility: Allows for dynamic configuration and adaptation of the system.

Additional Details

The X28256DMB25 supports a variety of operating modes, including read, write, and erase operations. The device typically operates from a single 5V power supply. The data is organized as 32,768 bytes (32K x 8). The page write mode allows writing up to 64 bytes in a single operation, improving write throughput. Specific timing parameters, such as access time, write cycle time, and erase cycle time, are detailed in the datasheet. Proper decoupling capacitors and noise filtering are essential for reliable operation. It's important to consult the datasheet for complete electrical characteristics, timing diagrams, and application guidelines.