The MICROCHIP TECH. part AT89C51ED2-SMSUM is an MCU (Microcontroller Unit) featuring an 8-bit 8051 CISC architecture. It comes with 64KB Flash memory and EEPROM, making it ideal for embedded systems requiring extensive program code and data storage. This microcontroller operates at either 3.3V or 5V, providing flexibility in power supply options. Housed in a 68-pin PLCC package, it ensures ease of integration into various electronic designs. The AT89C51ED2-SMSUM is delivered in a tube packaging format, ensuring safe storage and transportation.