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ATXMEGA256A3B-AU The ATXMEGA256A3B-AU is an 8/16-bit AVR XMEGA microcontroller with 256KB Flash memory, 16KB SRAM, and 4KB EEPROM. It operates at up to 32 MHz and comes in a 64-TQFP surface mount package.
Mfr Part #:

ATXMEGA256A3B-AU

Available from 1 distributors
Mfr Name: Microchip Technology
Microchip Technology
The ATXMEGA256A3B-AU is an 8/16-bit AVR XMEGA microcontroller with 256KB Flash memory, 16KB SRAM, and 4KB EEPROM. It operates at up to 32 MHz and comes in a 64-TQFP surface mount package.
✓ Total Stock: 2 pcs

ATXMEGA256A3B-AU Available from 1 distributor

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Bristol Electronics ✓
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2 pcs
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2 pcs On Request 1 On Request On Request 2026-02-25 06:16:38 On Request On Request
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ATXMEGA256A3B-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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ATXMEGA256A3B-AU Description

Short technical summary and product information.

The Microchip Technology ATXMEGA256A3B-AU is an 8/16-bit AVR XMEGA microcontroller designed for low-power and high-performance embedded applications. It features 256KB of in-system self-programmable Flash, 16KB internal SRAM, and 4KB EEPROM. The core operates at up to 12 MHz from 1.6V to 3.6V and up to 32 MHz from 2.7V to 3.6V.

 

Peripheral features include four DMA channels, an eight-channel event system, seven 16-bit timer/counters, six USARTs, two I2C interfaces, two SPI peripherals, an AES and DES crypto engine, a 32-bit real-time counter with battery backup, 16-channel 12-bit ADC, 2-channel 12-bit DAC, and four analog comparators. The device is housed in a 64-lead TQFP (14x14 mm) package and supports surface mount mounting. Operating temperature range is -40°C to 85°C. Typical applications include industrial control, climate control, hand-held battery devices, and factory automation.

ATXMEGA256A3B-AU Quick Information

Product Type: Microcontroller
Series: ATXMEGA256A3B
Canonical Name: Microchip Technology ATXMEGA256A3B-AU AVR XMEGA 8/16-bit Microcontroller
Subcategory: AVR XMEGA

ATXMEGA256A3B-AU Compliance

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

ATXMEGA256A3B-AU Features

  • 8/16-bit AVR XMEGA core with up to 32MHz.
  • 256KB Flash and 16KB SRAM memory.
  • Operates from 1.6V to 3.6V supply.
  • Includes AES and DES crypto engine.
  • Surface mount 64-TQFP package.

ATXMEGA256A3B-AU Applications

  • Suitable for industrial automation and control systems.
  • Ideal for sensor interfaces and data acquisition.
  • Used in communication modules with multiple UART/SPI/I2C.
  • Applicable for embedded systems requiring cryptographic functions.
  • Suitable for portable devices due to low power operation.

ATXMEGA256A3B-AU FAQs

7 frequently asked questions generated from this part’s specifications.
What is the operating voltage range of the ATXMEGA256A3B-AU?

1.6V to 3.6V.

What package does the ATXMEGA256A3B-AU come in?

64-TQFP (14x14mm).

What is the operating temperature range?

-40°C to 85°C.

Is the ATXMEGA256A3B-AU RoHS compliant?

Yes, it is RoHS3 compliant (unverified).

What is the maximum clock frequency?

32MHz at 2.7V-3.6V, and 12MHz at 1.6V-3.6V.

How much Flash memory does it have?

256KB.

How many I/O pins does it have?

49.

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