The X28C256JM-20 is a 256K EEPROM (Electrically Erasable Programmable Read-Only Memory) manufactured by Xicor Inc. It's designed for non-volatile storage in a variety of electronic systems, allowing data to be retained even when power is removed. This particular model boasts a fast access time of 200ns, making it suitable for applications where quick data retrieval is crucial.

Applications:

• Embedded systems for storing configuration data
• Industrial control systems for storing calibration parameters
• Data logging applications for retaining sensor readings
• BIOS storage in older computer systems
• Firmware storage in programmable devices

Features:

• 256K (32K x 8) memory organization
• Fast access time: 200ns
• Single 5V power supply operation
• Self-timed write cycle
• Automatic page write operation
• Data polling for end-of-write detection
• Low power CMOS technology
• JEDEC standard pinout
• High endurance: 100,000 erase/write cycles
• Data retention: 10 years

Benefits:

• Non-volatile storage: Retains data even when power is off, ensuring critical information is preserved.
• Fast access time: Enables quick data retrieval, improving system performance.
• Ease of programming: Electrically erasable and programmable, simplifying updates and modifications.
• High endurance: Withstands numerous erase/write cycles, ensuring long-term reliability.
• Low power consumption: Reduces energy requirements, suitable for battery-powered applications.

Additional Details:

The X28C256JM-20 utilizes CMOS technology, which contributes to its low power consumption. The device supports a self-timed write cycle, simplifying the write operation. Data polling allows the system to detect the end of the write cycle, ensuring data integrity. It's commonly packaged in a JEDEC standard ceramic DIP package.