MCHPATMEGA328P-AU
Overview
The ATMEGA328P-AU is an 8-bit AVR microcontroller from Microchip with 32 KB of in-system programmable flash, supporting clock rates up to 20 MHz and an operating voltage range of 1.8 V to 5.5 V. It is a widely used general-purpose MCU for low- to mid-complexity embedded applications. The device supports common peripheral sets used in hobbyist and industrial projects.
Why Choose This Part
Choose the ATMEGA328P-AU when you want a low-cost, well-documented 8-bit MCU with a huge community and ecosystem. It has a simple instruction set, plentiful example code and libraries, and broad toolchain support (avr-gcc, Arduino IDE, Microchip Studio). The flexible supply range and in-system programmable flash make it convenient for battery projects and easy firmware updates.
Applications
Getting Started
Use common development boards like Arduino Uno, Pro Mini, or Nano (or a breadboard with the DIP variant) to get started quickly. Toolchains include the Arduino IDE for rapid prototyping, avr-gcc/AVRDUDE for command-line workflows, and Microchip Studio for full-featured debugging and programming. For flashing you can use the Arduino bootloader over USB-serial or an ISP programmer (USBasp, AVRISP, etc.).
ATMEGA328P Family
Comparing specs that differ across variants. The current part is highlighted.
| Part Number | I/O Pins | Stock |
|---|---|---|
| ATMEGA328P-AU (this part) | — | 4,542 |
| ATmega328P | 27 | 13,074 |
| ATMEGA328P-MU | 23 | 5,629 |
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