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Home Products Integrated Circuits (ICs)Embedded - Microcontrollers~~ATXMEGA256A3BU-MHR~~

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ATXMEGA256A3BU-MHR - Microchip Technology

Name: Microchip Technology ATXMEGA256A3BU-MHR
Brand: Microchip Technology
SKU: ATXMEGA256A3BU-MHR
Availability: InStock
Rating: 5 (2 reviews)

Manufacturer Part Number: ATXMEGA256A3BU-MHR

Manufacturer: Microchip Technology

Allelco Part Number: 32D-ATXMEGA256A3BU-MHR

Warranty: 1 Year Allelco Warranty - Find out more

Parts Description: IC MCU 8/16BIT 256KB FLASH 64QFN

Package: 64-QFN (9x9)

Data sheet: 1.ATXMEGA256A3BU-.pdf ...

Datasheets
XMEGA AU Manual.pdf

HTML Datasheet
Cylindrical Battery Holders.pdf

PCN Assembly/Origin
2.73KHz.pdf

PCN Design/Specification
Cylindrical Battery Holders.pdf

PCN Other
2.73KHz.pdf

PCN Packaging
Tape and Reel Label Update 10/Feb/2015.pdf Transfer to Microchip/Label/Pkg 5/Sep/2016.pdf

RoHs Status: ROHS3 Compliant

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Specifications

ATXMEGA256A3BU-MHR Tech Specifications
Microchip Technology - ATXMEGA256A3BU-MHR technical specifications, attributes, parameters and parts with similar specifications to Microchip Technology - ATXMEGA256A3BU-MHR

Product Attribute	Attribute Value
Manufacturer	Microchip Technology
Voltage - Supply (Vcc/Vdd)	1.6V ~ 3.6V
Supplier Device Package	64-QFN (9x9)
Speed	32MHz
Series	AVR® XMEGA® A3BU
RAM Size	16K x 8
Program Memory Type	FLASH
Program Memory Size	256KB (128K x 16)
Peripherals	Brown-out Detect/Reset, DMA, POR, PWM, WDT
Package / Case	64-VFQFN Exposed Pad
Package	Tape & Reel (TR)

Product Attribute	Attribute Value
Oscillator Type	Internal
Operating Temperature	-40°C ~ 85°C (TA)
Number of I/O	47
Mounting Type	Surface Mount
EEPROM Size	4K x 8
Data Converters	A/D 16x12b; D/A 2x12b
Core Size	8/16-Bit
Core Processor	AVR
Connectivity	I²C, IrDA, SPI, UART/USART, USB
Base Product Number	ATXMEGA256

Environmental & Export Classifications

ATTRIBUTE	DESCRIPTION
RoHs Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)
REACH Status	REACH Unaffected
ECCN	5A992C
HTSUS	8542.31.0001

Parts Introduction

Manufacturer Part Number

ATXMEGA256A3BU-MHR

Manufacturer

Microchip Technology

Introduction

ATXMEGA256A3BU-MHR is an 8/16-bit high-performance, low-power AVR XMEGA A3BU Microcontroller.

Product Features and Performance

8/16-bit AVR core architecture

Maximum speed of 32MHz

Rich set of connectivity options such as I2C, IrDA, SPI, UART/USART, and USB

Enhanced peripherals including Brown-out Detect/Reset, DMA, POR, PWM, WDT

47 programmable I/O pins

Flash program memory of 256KB (128K x 16)

Integrated 4KB EEPROM

16KB internal RAM

Flexible supply voltage ranging from 1.6V to 3.6V

Internal oscillators for device clocking

Advanced analog features with A/D 16x12b, D/A 2x12b

Product Advantages

Extensive interface options for flexible design

Large memory capacity supporting complex applications

Power efficiency suitable for battery-powered devices

Robust peripheral set supporting a wide range of functionalities

Integrated analog interfaces reduce the need for external components

Key Technical Parameters

Core Size: 8/16-Bit

Speed: 32MHz

Number of I/O: 47

Program Memory Size: 256KB

EEPROM Size: 4KB

RAM Size: 16KB

Voltage Supply (Vcc/Vdd): 1.6V ~ 3.6V

Data Converters: A/D 16x12b, D/A 2x12b

Operating Temperature: -40°C ~ 85°C

Quality and Safety Features

Brown-out Detect/Reset for voltage monitoring

POR (Power-on Reset) ensuring reliable operation after power-ups

WDT (Watchdog Timer) for system recovery and stability

Compatibility

Compatible with various communication protocols

Suitable for use with Microchip and third-party development tools

Application Areas

Industrial automation

Consumer electronics

Automotive systems

Internet of Things (IoT) devices

Medical equipment

Product Lifecycle

Status: Active

Regularly updated and supported by the manufacturer

Several Key Reasons to Choose This Product

High scalability with extensive memory and interfacing capabilities

Efficient performance with advanced RISC architecture

Low power consumption ideal for portable devices

Wide operating temperature range supporting harsh environments

Multipurpose usage across various industries and applications

Parts with Similar Specifications

The three parts on the right have similar specifications to Microchip Technology ATXMEGA256A3BU-MHR

Product Attribute
Part Number	ATXMEGA256A3BU-MNR	ATXMEGA256A3BU-MH	ATXMEGA256A3B-MHR	ATXMEGA256A3U-M7R
Manufacturer	Microchip Technology	Microchip Technology	Microchip Technology	Microchip Technology
Package	-	Tape & Reel (TR)	Tube	Tape & Reel (TR)
Number of I/O	-	-	-	-
Core Processor	-	-	-	-
Oscillator Type	-	-	-	-
EEPROM Size	-	-	-	-
Package / Case	-	196-LFBGA	16-DIP (0.300', 7.62mm)	64-VFQFN Exposed Pad
Core Size	-	-	-	-
Series	-	-	-	-
Connectivity	-	-	-	-
Operating Temperature	-	-40°C ~ 85°C	0°C ~ 70°C	-40°C ~ 85°C
Voltage - Supply (Vcc/Vdd)	-	-	-	-
Program Memory Size	-	-	-	-
Supplier Device Package	-	196-NFBGA (12x12)	16-PDIP	64-VQFN (9x9)
Mounting Type	-	Surface Mount	Through Hole	Surface Mount
Peripherals	-	-	-	-
Base Product Number	-	DAC34H84	MAX500	ADS62P42
Speed	-	-	-	-
Data Converters	-	-	-	-
RAM Size	-	-	-	-
Program Memory Type	-	-	-	-

ATXMEGA256A3BU-MHR Datasheet PDF

Download ATXMEGA256A3BU-MHR pdf datasheets and Microchip Technology documentation for ATXMEGA256A3BU-MHR - Microchip Technology.

Datasheets: XMEGA AU Manual.pdf
HTML Datasheet: Cylindrical Battery Holders.pdf
PCN Assembly/Origin: 2.73KHz.pdf
PCN Design/Specification: Cylindrical Battery Holders.pdf
PCN Other: 2.73KHz.pdf
PCN Packaging: Tape and Reel Label Update 10/Feb/2015.pdf Transfer to Microchip/Label/Pkg 5/Sep/2016.pdf

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Customer Reviews

Evaluation: 10 Articles

Jess***Jones

Apr 17, 2026

It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.
Mich***Smith

Apr 17, 2026

Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.
Aman***arris

Apr 3, 2026

It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.
Mike***nch

Apr 3, 2026

Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.
Daic***K.

Mar 23, 2026

Very good. No issue after long time testing.
Kevi***.

Mar 17, 2026

Fast switching and stable output. Very satisfied with this IC
Daou***hekebkeb

Jun 16, 2024

I had a great experience purchasing items from Allelcoelec, I recommend
Uri ***al

Jun 19, 2024

Good comunication,
Transpnt regarding the process and price.
Yaqu***l Ali

Jun 19, 2024

Providing reasonable prices, regular follow-up of orders, providing accurate and regular invoices, timely delivery of goods, excellent customer service and providing original goods and best quality materials.
Lea ***

Jun 19, 2024

Morrey was very helpful and right on top of things!
He replied quickly to my RFQ. He was very courteous and professional.

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Shipment

Delivery Time

In-stock items can be shipped within 24 hours. Some parts will be arranged for delivery within 1-2 days from the date all items arrive at our warehouse. And Allelco ships order once a day at about 17:00, except Sunday. Once the goods are shipped, the estimated delivery time depends on the shipping methods and Delivery destination. The table below shows are the logistic time for some common countries.

Delivery Cost

Use your express account for shipment if you have one.
Use our account for the shipment. Refer to the table below for the approximate charges.

(Different time frame / countries / package size has different price.)

Delivery Method

Global Common Shipment by DHL / UPS / FedEx / TNT / EMS / SF we support.
Others more shipping ways, please get in touch with your customer manager.

Common Countries Logistic Time Reference
Region	Country	Logistic Time(Day)
America	United States	5
America	Brazil	7
Europe	Germany	5
	United Kingdom	4
	Italy	5
Oceania	Australia	6
Oceania	New Zealand	5
Asia	India	4
Asia	Japan	4
Middle East	Israel	6

DHL & FedEx Shipment Charges Reference
Shipment charges(KG)	Reference DHL(USD$)
0.00kg-1.00kg	USD$30.00 - USD$60.00
1.00kg-2.00kg	USD$40.00 - USD$80.00
2.00kg-3.00kg	USD$50.00 - USD$100.00

Note:: The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.

Payment Support

The payment method can be chosen from the methods shown below: Wire Transfer (T/T, Bank Transfer), Western Union, Credit card, PayPal.

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