An AT24C256 256Kbit I2C Serial EEPROM is a non-volatile, electrically erasable programmable read-only memory Integrated Circuit (IC) designed for persistent data storage in embedded systems. Encapsulated in a standard 8-pin Dual In-line Package (DIP-8), it provides 262,144 bits of memory organized as 32,768 words of 8 bits each. Communicating via a 2-wire I2C serial interface (SCL/SDA), it allows microcontrollers to retain system parameters, calibration data, and log records even through power power cycles. Printed clearly with part number "24C256" (manufactured by Atmel/Microchip), it includes hardware write-protection and configurable device address pins.

This product is featured by Famephase Electronic Accessories as an essential non-volatile memory solution for data logging, configuration parameter storage, user setting retention, and system calibration backup across microcontrollers like Arduino, STM32, and ESP32.