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The ATXMEGA32A4U-AU features a 32KB flash memory, 44-pin TQFP package, and operates on an 8-bit architecture for efficient processing

Quality Assurance

Quality Assurance

All parts procured from our supply chain network undergo a rigorous incoming inspection process. This meticulous inspection ensures that the parts received by our customers are authentic and meet the required standards. Additionally, we maintain detailed records of these inspections to ensure transparency and traceability throughout the supply chain.

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We have successfully obtained various certification standards and have established our own professional testing laboratory. This ensures that every product we supply to our customers meets the highest quality standards. We adhere to strict testing protocols to maintain the consistency and accuracy of our products. To ensure that our products are original and genuine, we also collaborate with reputable third-party testing facilities to conduct rigorous quality testing. Our commitment to quality extends to meeting industry, legal, regulatory, and ISO 9001:2015 requirements.

Shipping & Payment

Shipping & Payment

About Shipping

We generally ship orders within a few business days through reliable shipping carriers such as FedEx, SF, UPS, or DHL. We also have support for other shipping methods. If you would like to inquire about specific shipping details or costs, please don't hesitate to reach out to us.

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We accept various payment methods, including VISA, MasterCard, UnionPay, Western Union, PayPal, and other channels.

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Service & Packaging

Service & Packaging

About After Sales Service

All Parts Extended Quality Guarantee

Initiate the application within 90 days from the shipment date.

Confirm the return or exchange with our staff.

Maintain the goods in their original condition as received.

Lastly, please note that the eligibility for return or exchange of goods is subject to an assessment of the actual condition of the returned items. We will evaluate the received goods before finalizing the return or exchange process. If you have any inquiries or require further assistance regarding returns or exchanges, please don't hesitate to contact us at [email protected]

About packaging

Regarding packaging, our products are carefully packed in anti-static bags to provide ESD anti-static protection. The outer packaging is durable with secure closure. We support various packaging methods such as Tape and Reel, Cut Tape, Tube, or Tray.



Tape and Reel

Tape and Reel

Cut Tape

Cut Tape

Tube or Tray

Tube or Tray



Current price plan is under preparation. Please contact our customer service team for the latest pricing information. Thank you for your understanding and support!

Rapid Quote

Please submit RFQ for ATXMEGA32A4U-AU or email to us: Email: [email protected], we will contact you in 12 hours.


One of the standout features of the ATXMEGA32A4U-AU is its picoPower technology, which enhances power efficiency and makes it suitable for battery-powered and low-power applications. This makes it an attractive option for developers looking to optimize energy consumption in their designs. Furthermore, the MCU comes with a rich set of development tools and software libraries that streamline the firmware development and debugging process. This allows users to quickly get their projects up and running without having to spend excessive time on software setup and troubleshooting

Key Features

  • High-performance, Low-power Atmel® AVR® XMEGA® 8/16-bit Microcontroller
  • Non-volatile Program and Data Memories
  • – 16K - 128KBytes of In-System Self-Programmable Flash
  • – 4K - 8KBytes Boot Code Section with Independent Lock Bits
  • – 1K - 2KBytes EEPROM
  • – 2K - 8KBytes Internal SRAM
  • Peripheral Features
  • – Four-channel DMA Controller
  • – Eight-channel Event System
  • – Five 16-bit Timer/Counters
  • Three Timer/Counters with 4 Output Compare or Input Capture channels
  • Two Timer/Counters with 2 Output Compare or Input Capture channels
  • High-Resolution Extensions on all Timer/Counters
  • Advanced Waveform Extension on one Timer/Counter
  • – One USB device Interface
  • USB 2.0 full speed (12Mbps) and low speed (1.5Mbps) device compliant 32 Endpoints with full configuration flexibility
  • – Five USARTs with IrDA support for one USART
  • – Two Two-Wire Interfaces with dual address match (I2C and SMBus compatible)
  • – Two Serial Peripheral Interfaces (SPIs)
  • – AES and DES Crypto Engine
  • – CRC-16 (CRC-CCITT) and CRC-32 (IEEE 802.3) Generator
  • – 16-bit Real Time Counter with Separate Oscillator
  • – One Twelve-channel, 12-bit, 2MSPS Analog to Digital Converter
  • – One Two-channel, 12-bit, 1MSPS Digital to Analog Converter
  • – Two Analog Comparators with Window compare function, and current source feature
  • – External Interrupts on all General Purpose I/O pins
  • – Programmable Watchdog Timer with Separate On-chip Ultra Low Power Oscillator
  • – QTouch® library support
  • Capacitive touch buttons, sliders and wheels Up to 64 sense channels
  • Special Microcontroller Features
  • – Power-on Reset and Programmable Brown-out Detection
  • – Internal and External Clock Options with PLL and Prescaler
  • – Programmable Multi-level Interrupt Controller
  • – Five Sleep Modes
  • – Programming and Debug Interfaces PDI (Program and Debug Interface)
  • I/O and Packages
  • – 34 Programmable I/O Pins
  • – 44 - lead TQFP
  • – 44 - pad VQFN/QFN
  • – 49 - ball VFBGA
  • Operating Voltage
  • – 1.6 – 3.6V
  • Operating Frequency
  • – 0 – 12MHz from 1.6V
  • – 0 – 32MHz from 2.7V


The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.

Product Category ! 8-bit Microcontrollers - MCU RoHS Details
Core AVR Program Memory Size 32 kB
Data RAM Size 4 kB Package / Case TQFP-44
Maximum Clock Frequency 32 MHz ADC Resolution 12 bit
Number of I/Os 34 I/O Supply Voltage - Min 1.6 V
Supply Voltage - Max 3.6 V Mounting Style SMD/SMT
Data Bus Width 8 bit/16 bit Minimum Operating Temperature - 40 C
Maximum Operating Temperature ! + 85 C Series XMEGA A4U
Brand Microchip Technology Moisture Sensitive Yes
Number of Timers/Counters 5 Timer Processor Series AVR XMEGA
Product MCUs Product Type ! 8-bit Microcontrollers - MCU
Factory Pack Quantity 160 Subcategory Microcontrollers - MCU
Tradename XMEGA Unit Weight 0.059049 oz

Specification Comparison

Datasheet PDF

Datasheets record the features, absolute maximum ratings, applications and more of the device, which benefit a lot as an overall guide to the specific application of the part.

Preliminary Specification ATXMEGA32A4U-AU PDF Download


What is ATXMEGA32A4U-AU?

The ATXMEGA32A4U-AU is a high-performance, low-power microcontroller from Microchip Technology. It belongs to the XMEGA A4U series and is designed for a wide range of applications in industrial control, wireless communication, automotive systems, and consumer electronics.

How Does ATXMEGA32A4U-AU Work?

The ATXMEGA32A4U-AU operates as a versatile microcontroller with advanced features including a high-performance 8/16-bit CPU, a wide range of communication interfaces, and flexible peripheral functions. It uses low-power consumption techniques to optimize energy efficiency in battery-powered applications.

How Many Pins does ATXMEGA32A4U-AU have and What are the Functions of the Pinout Configuration?

The ATXMEGA32A4U-AU is housed in a 44-lead QFP (Quad Flat Package) package. The pinout configuration includes:

  • VCC: Power supply pin.
  • GND: Ground pin.
  • RESET: Reset input pin.
  • XTAL1, XTAL2: Crystal oscillator input and output pins.
  • PORTx: General-purpose I/O pins (x varies based on port number).
  • USARTx: USART communication interface pins (x denotes the USART module number).
  • ADCx: Analog-to-digital converter input pins (x represents the ADC channel number).

What are the Pros and Cons of ATXMEGA32A4U-AU?


  • High Performance: Features a high-performance CPU with advanced peripherals for demanding applications.
  • Low Power Consumption: Incorporates power-saving modes for energy-efficient operation.
  • Rich Peripheral Set: Offers a wide range of communication interfaces and flexible I/O options for diverse applications.
  • Enhanced Security Features: Includes security mechanisms to protect firmware and data.


  • Complexity: The advanced features may require a learning curve for inexperienced users.
  • Cost: Higher performance often comes with a higher price tag compared to simpler microcontrollers.
  • Pin Count: The 44-lead QFP package may limit the number of available I/O pins for some designs.

Are There Any Equivalents/Alternatives to ATXMEGA32A4U-AU for Recommendation?

  • The ATmega32U4 from Microchip Technology is a comparable microcontroller with USB connectivity.
  • Alternatives to the ATXMEGA32A4U-AU include the STM32F4 series from STMicroelectronics and the PIC32 series from Microchip.

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