The X28C256DMB-25 is a 256Kbit (32K x 8) CMOS EEPROM (Electrically Erasable Programmable Read-Only Memory) manufactured by Xicor Inc. It is designed for non-volatile data storage in applications where in-system programmability and reliable data retention are crucial. This memory device is commonly used in embedded systems, industrial controls, and other applications requiring persistent storage of configuration parameters, calibration data, or program code.

Applications:

• Embedded systems
• Industrial control systems
• Instrumentation equipment
• Data logging applications
• Remote control devices

Features:

• 256Kbit (32K x 8) capacity: Provides a moderate amount of non-volatile storage.
• CMOS technology: Offers low power consumption, suitable for battery-powered applications.
• In-system programmability: Allows for easy updating of stored data without removing the device.
• Fast access time: The '-25' designation indicates a 250ns access time, allowing for quick data retrieval.
• Automatic page write mode: Simplifies the writing process.
• Data polling: Provides a method for detecting the end of a write cycle, improving efficiency.

Benefits:

• Non-volatile storage: Retains data even when power is removed, ensuring data integrity.
• In-system programmability: Enables easy updates and modifications to stored data.
• Low power consumption: Suitable for applications where power efficiency is a concern.
• Fast access time: Ensures quick data retrieval for optimal performance.
• High endurance: Designed to withstand a significant number of write/erase cycles.

Additional Details:

The X28C256DMB-25 operates from a single 5V power supply and is typically available in a DIP (Dual In-line Package) or surface-mount package. It includes features such as a write-protect function to prevent accidental data corruption and a page write mode to improve programming efficiency. The device uses a standard JEDEC pinout for easy integration into existing systems. Xicor's EEPROM technology ensures high data retention, typically specified for 10 years or more. The endurance rating for write/erase cycles is generally in the range of 10,000 to 100,000 cycles per byte.

The X28C256DMB-25 provides a reliable and cost-effective solution for non-volatile data storage in a variety of applications. Its in-system programmability and low power consumption make it a suitable choice for embedded systems and other applications requiring persistent storage.