Parts Microcontrollers AVR ATmega Family ATMEGA328P ATMEGA328P-AUR

MCHPATMEGA328P-AUR

Name: ATMEGA328P-AUR
Brand: Microchip Technology

Microchip Technology

8-bit Microcontrollers - MCU AVR 32K FLSH 2K SRAM 1KB EE-20MHz IND

NRND28,917 in stock

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Overview

The ATMEGA328P-AUR is an 8-bit AVR microcontroller from Microchip with 32 KB Flash, 2 KB SRAM and 1 KB EEPROM and a maximum CPU clock of 20 MHz. It is a widely used general-purpose MCU for low-cost embedded and hobbyist applications, notably found in many Arduino-compatible boards. The part provides a mix of digital I/O, timers, ADC, and serial interfaces for basic embedded control tasks.

Why Choose This Part

Proven ecosystem with extensive community examples, Arduino bootloaders, and board-level support reduces development time. Low unit cost, modest resource needs, and simple peripherals (ADC, timers, UART/SPI/I2C) make it well suited to straightforward control and sensing tasks. Wide availability in multiple packages and a large toolchain and debugger ecosystem simplify prototyping and production.

Applications

Education and prototyping

Use in introductory microcontroller labs and breadboard projects where easy tooling and example code are important.

Hobbyist and maker projects

Ideal for LED controllers, sensors, simple user interfaces, and standalone Arduino-compatible projects.

Sensor nodes and data logging

Good for low-complexity sensor reading, local processing, and EEPROM-backed configuration storage.

Simple motor and actuator control

Suitable for basic DC motor, stepper control and PWM-driven actuators in small robotics or toys.

Getting Started

Common development paths include Arduino Uno/Nano/Pro Mini boards for rapid prototyping, or using a standalone ATmega328P with an ISP programmer. Toolchains: Arduino IDE for beginner workflows, avr-gcc and avrdude for command-line development, and Microchip Studio (formerly Atmel Studio) for Windows-based debugging. Programmers such as USBasp, AVRISP mkII or Atmel-ICE (or using the Arduino bootloader via a USB-serial adapter) are commonly used - consult the datasheet for correct Vcc, clock and fuse settings before programming.

Part of ATmega family » ATMEGA328P

ATMEGA328P Family

Comparing specs that differ across variants. The current part is highlighted.

Part Number	I/O Pins	Stock
ATMEGA328P-AUR (this part)	—	28,917
ATmega328P	27	13,074
ATMEGA328P-MU	23	5,629

Also available as: ATMEGA328P-PU DIP28, ATMEGA328P-PU, ATMEGA328P-AU, ATMEGA328P-MUR

Also Consider

ATMEGA328P-PU MCHPMicrochip Technology - DIP package variant commonly used for breadboard prototyping and through-hole assemblies.

ATMEGA328P-AU MCHPMicrochip Technology - Surface-mount TQFP/SMD package variant commonly used on Arduino-compatible boards.

ATMEGA328PB-AU MCHPMicrochip Technology - Pin- and feature-compatible upgraded variant (ATmega328PB family) for designs needing additional peripherals.