The X28C256J-20 is a 256K EEPROM (Electrically Erasable Programmable Read-Only Memory) manufactured by Xicor Inc. This device offers non-volatile storage, meaning it retains data even when power is removed. It's designed for applications requiring in-system electrical erasure and programming, providing flexibility and convenience in updating stored information.

Applications:

• Embedded systems for storing configuration data.
• Industrial control systems for storing calibration parameters.
• Data logging applications where persistent storage is required.
• Firmware storage for various electronic devices.
• Consumer electronics for storing user settings and preferences.

Features:

• 256K (32K x 8) memory organization.
• Fast access time of 200ns.
• In-system electrical erasure and programming capability.
• Low power CMOS technology.
• Automatic page write operation.
• Data polling for end-of-write detection.
• TTL compatible inputs and outputs.
• JEDEC standard byte-wide pinout.

Benefits:

• Non-volatile data storage: Retains data even when power is off, ensuring data integrity.
• In-system programmability: Allows for easy updates and modifications without removing the device from the system.
• Fast access time: Enables quick data retrieval, improving system performance.
• Low power consumption: Reduces energy usage, making it suitable for battery-powered applications.
• Ease of integration: TTL compatible I/O and JEDEC standard pinout simplify design and implementation.

Additional Details:

The X28C256J-20 operates from a single 5V power supply. It supports a page write mode, allowing for faster write times by writing multiple bytes simultaneously. The device also features data polling, which allows the system to determine when the write operation is complete, further optimizing performance. The device is available in a JEDEC-standard 28-pin DIP (Dual In-Line Package).