ATmega328 Atmega328p-pu DIP-28 Pin 8-bit Microcontroller with 32K Bytes In-System Programmable Flash Pack of 4 20 MHz 28 Pin Dip with 32KB Flash, and 2KB Random Access Memory 6 Analog/Digital Ports, 6 Basic Digital Ports, 6 PWM, and 1 Serial bus (Tx & Rx) Good to use as a AVR Microcontroller Good to replace the Atmega328-PU got burned while building your project Comes in anti-static rails or on ESD foam wrapped in anti-static bags.