The AT28C256-20SC is a 256Kbit (32K x 8) Electrically Erasable and Programmable Read-Only Memory (EEPROM) from Atmel. It offers non-volatile data storage with in-system programmability. With a 200ns access time, it suits applications needing quick read operations. This EEPROM can be erased and reprogrammed electrically, allowing for flexible data updates. Because it is an END-OF-LIFE product, it is mainly used in older systems.

Applications:

• Storing configuration data
• Storing user preferences
• Data logging
• Programmable logic devices (PLDs)
• Industrial control systems

Features:

• 256Kbit (32K x 8) EEPROM
• Fast access time (200ns)
• In-system programmability
• Low power consumption
• JEDEC standard pinout

Benefits:

• Non-volatile storage without battery backup
• Easy in-system updates
• Fast read operations
• Compatibility with standard microcontrollers
• Robust data retention

Additional Details:

The AT28C256-20SC typically comes in a PDIP or SOIC package. Key electrical characteristics include supply voltage (VCC), write cycle time, and read access time. Programming and erasing require specific voltage and timing sequences. Due to its END-OF-LIFE status, consider modern flash memory options for new designs. Detailed specifications are available in the Atmel datasheet.