ATMega328P Microcontroller IC
It is the heart of one of the most popular Development Board Arduino UNO R3.
It is high performance, low power, 8 Bit, 32 KB Flash Memory, 28 Pin DIP AVR Advanced RISC Architecture based microcontroller.
The device is picoPowered (consumes much less power than the non picoPowered device of similar configuration).
It has 20 MHz CPU Clock, 3 Timers and 6 PWM Channels.
The operating voltage range is 1.8V to 5.5V.