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ATMEGA328P-AU ATMEGA328P-AU is a low-power 8-bit AVR microcontroller from Microchip Technology with 32KB Flash, 2KB SRAM, and 1KB EEPROM. It operates at up to 20 MHz and includes 23 I/O lines, 8-channel 10-bit ADC, and multiple serial interfaces.
Mfr Part #:

ATMEGA328P-AU

Available from 3 distributors
Mfr Name: Atmel
Atmel
ATMEGA328P-AU is a low-power 8-bit AVR microcontroller from Microchip Technology with 32KB Flash, 2KB SRAM, and 1KB EEPROM. It operates at up to 20 MHz and includes 23 I/O lines, 8-channel 10-bit ADC, and multiple serial interfaces.
✓ Total Stock: 1,333 pcs

ATMEGA328P-AU Available from 3 distributors

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ATMEGA328P-AU Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Connectivity
Core Processor
Core Size
Data Converters
EEPROM Size
Mounting Type
Number of I
Operating Temperature
Oscillator Type
Peripherals
Program Memory Size
Program Memory Type
RAM Size
Speed
Supplier Device Package
Termination Style
Voltage
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ATMEGA328P-AU Description

Short technical summary and product information.

The ATMEGA328P-AU is a low-power, high-performance 8-bit microcontroller based on the AVR enhanced RISC architecture. It features 32KB of in-system self-programmable Flash memory, 2KB of internal SRAM, and 1KB of EEPROM with high endurance (10,000/100,000 write/erase cycles respectively). The device achieves up to 20 MIPS throughput at 20 MHz, allowing designers to balance power consumption and processing speed.

 

Operating from 1.8V to 5.5V, the ATMEGA328P-AU is suitable for a wide range of applications. It includes 23 general-purpose I/O lines, three flexible timer/counters (two 8-bit, one 16-bit) with compare modes, six PWM channels, an 8-channel 10-bit ADC, and serial interfaces (USART, SPI, I2C). Six sleep modes (Idle, ADC Noise Reduction, Power-save, Power-down, Standby, Extended Standby) enable low-power operation, with a typical power-down current of 0.1 µA.

 

The microcontroller is available in a 32-TQFP (7x7mm) surface-mount package with a 0.8mm lead pitch. It is designed for embedded control, sensor interfacing, IoT devices, and industrial automation. The part is originally from Atmel, now part of Microchip Technology, and is commonly used in Arduino platforms.

ATMEGA328P-AU Quick Information

Product Type: Microcontroller
Series: ATmega328P
Canonical Name: Microchip Technology ATMEGA328P-AU 8-bit AVR Microcontroller
Subcategory: 8-bit Microcontroller

ATMEGA328P-AU Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

ATMEGA328P-AU Features

  • High-performance 8-bit AVR RISC architecture.
  • Up to 20 MIPS throughput at 20 MHz.
  • 32KB Flash memory with 10,000 write/erase cycles.
  • Low power consumption: 0.1µA in power-down mode.
  • Six flexible sleep modes for power management.

ATMEGA328P-AU Applications

  • Ideal for battery-powered embedded systems.
  • Suitable for sensor interfacing and data acquisition.
  • Used in IoT edge devices and control modules.
  • Perfect for industrial automation and robotics.
  • Common in Arduino-based prototyping platforms.

ATMEGA328P-AU FAQs

7 frequently asked questions generated from this part’s specifications.
What is the operating voltage range of the ATMEGA328P-AU?

The operating voltage range is 1.8V to 5.5V.

What is the operating temperature range?

-40°C to 85°C.

What package does the ATMEGA328P-AU come in?

It is available in a 32-TQFP (7x7mm) surface-mount package.

Is the ATMEGA328P-AU RoHS compliant?

RoHS3 compliant per existing database, but unverified.

What is the maximum clock frequency?

20 MHz maximum at 4.5V-5.5V.

How much Flash memory does the ATMEGA328P-AU have?

32KB (16K x 16) of Flash program memory.

How many I/O pins are available?

23 general-purpose I/O lines.

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