Item specifics
Description
ATMEGA328P-AU Product Overview
The ATMEGA328P-AU is a high-performance, low-power 8-bit AVR microcontroller from Microchip Technology (formerly Atmel), housed in a 32-pin TQFP (7×7mm) surface-mount package. Based on the AVR enhanced RISC architecture, the ATMEGA328P-AU achieves CPU throughput approaching 1 MIPS per MHz by executing instructions in a single clock cycle. It integrates 32KB of In-System Self-Programmable Flash, 1KB EEPROM, and 2KB SRAM. Supporting a wide operating voltage range of 1.8V to 5.5V, a maximum frequency of 20MHz, and an industrial temperature range of -40℃ to +85℃. As the core processor of the Arduino UNO R3, Arduino Nano, and other classic development boards, the ATMEGA328P-AU is one of the most recognized 8-bit microcontrollers among makers and embedded developers worldwide.
ATMEGA328P-AU Key Features
ATMEGA328P-AU features high‑performance low‑power 8‑bit AVR RISC core
ATMEGA328P-AU provides 32KB in‑system self‑programmable Flash memory
ATMEGA328P-AU includes 2KB SRAM, 1KB EEPROM data storage
ATMEGA328P-AU uses TQFP‑32 SMD surface‑mount package, 7×7mm dimension
ATMEGA328P-AU operating voltage:1.8V‑5.5V wide voltage range
ATMEGA328P-AU max operating frequency up to 20MHz
ATMEGA328P-AU offers 23 general‑purpose I/O lines, 8‑channel 10‑bit ADC
ATMEGA328P-AU built‑in UART, SPI, I2C interfaces and multi‑channel PWM output
ATMEGA328P-AU supports ISP in‑system programming, multiple low‑power sleep modes
ATMEGA328P-AU industrial temperature range:‑40℃ ~ +85℃
ATMEGA328P-AU Applications
With its excellent cost-performance ratio, rich peripheral resources, and mature development ecosystem, the ATMEGA328P-AU is widely used in:
Arduino & Open-Source Hardware: ATMEGA328P-AU is the core MCU of Arduino UNO R3, Arduino Nano, Arduino Pro Mini, and other classic development boards
Embedded Systems & IoT: ATMEGA328P-AU is used in smart sensors, data acquisition terminals, environmental monitoring
Industrial Control & Automation: ATMEGA328P-AU is applied in PLC expansion modules, industrial instruments, motor control
Consumer Electronics & Home Appliances: ATMEGA328P-AU is found in smart home devices, remote controls, appliance control boards
Portable Medical Devices: ATMEGA328P-AU is used in glucose meters, thermometers, and other sensor data processing devices
Education & Prototyping: ATMEGA328P-AU supports university electronics courses, graduation projects, research prototypes
Robotics: ATMEGA328P-AU is used in line-following/obstacle-avoiding robots, racing cars, drone flight controllers
ATMEGA328P-AU Advantages
ATMEGA328P-AU compact TQFP‑32 SMD package saves PCB space, ideal for SMT mass assembly. Rich AVR open‑source codes & documents. ATMEGA328P-AU wide voltage and industrial temperature grade with good anti‑interference performance. ATMEGA328P-AU ISP programming without chip desoldering. ATMEGA328P-AU full peripheral interfaces, cost‑effective and sufficient stock, perfect for mass‑production and embedded development.
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FAQs:
What is the ATMEGA328P-AU chip?
ATMEGA328P-AU is a high-performance 8-bit AVR microcontroller from Microchip featuring a 32-pin TQFP package, commonly used in compact boards like the Arduino Nano .
What is its core frequency and memory capacity?
ATMEGA328P-AU runs at 20MHz achieving 20MIPS. It features 32KB Flash, 2KB SRAM, and 1KB EEPROM .
What is the package type?
ATMEGA328P-AU uses a 32-pin TQFP surface-mount package measuring 7x7 millimeters .
What are the operating voltage and temperature ranges?
For ATMEGA328P-AU, the voltage range is 1.8V to 5.5V, and the temperature range is -40°C to +85°C .
How does it differ from the 28-pin DIP version regarding ADC?
The 32-pin TQFP version of ATMEGA328P-AU provides 8 ADC channels (ADC0-ADC7), while the 28-pin DIP only provides 6 .
What communication interfaces does it support?
ATMEGA328P-AU supports UART/USART, SPI, and I2C, allowing easy connection to various peripherals .
Is it the core chip of the Arduino Nano?
Yes, ATMEGA328P-AU is the core controller for boards like the Arduino Nano, programmable directly via the Arduino IDE .
How is its power consumption?
ATMEGA328P-AU supports 6 low-power modes with extremely low current in Power-down mode, ideal for battery-powered applications .
What should be noted in hardware design?
When designing with ATMEGA328P-AU, place a 0.1μF decoupling capacitor near VCC and connect load capacitors to the crystal pins to ensure clock stability .
How can it be programmed?
ATMEGA328P-AU can be programmed via the serial bootloader or through In-System Programming (ISP) via SPI .