4-pack NEW Atmega328p-pu Chip & DIP IC Socket Bundle w/ Arduino UNO Bootloader 4pcs Atmega328-PU Chip and 4 DIP IC Sockets Bundle. 4pcs Atmega328-PU Chip Good to replace the Atmega328-PU got burned while building your project 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)