Microchip Technology ATXMEGA256A3U-MHR

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Product attributes Property Value
Manufacturer Microchip Technology
Product Series AVR® XMEGA® A3U
Packaging Cut Tape (CT) | Tape & Reel (TR)
Core Processor AVR
Core Size 8/16-Bit
Speed 32MHz
Connectivity I2C, IrDA, SPI, UART/USART, USB
Peripherals Brown-out Detect/Reset, DMA, POR, PWM, WDT
Number of I/O 50
Program Memory Size 256KB (128K x 16)
Program Memory Type FLASH
EEPROM Size 4K x 8
RAM Size 16K x 8
Voltage - Supply (Vcc/Vdd) 1.6V ~ 3.6V
Data Converters A/D 16x12b; D/A 2x12b
Oscillator Type Internal
Operating Temperature -40°C ~ 85°C (TA)
Grade -
Qualification AEC -
Mounting Type Surface Mount
Supplier Device Package 64-QFN (9x9)
Package / Case 64-VFQFN Exposed Pad
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The ATXMEGA256A3U-MHR from Microchip is a versatile 8/16-bit AVR microcontroller with 256KB flash and 16KB SRAM. At 32MHz, it offers DMA, PWM, and brown-out detection. Its 1.6V-3.6V supply range and 64-VFQFN package are perfect for low-power, high-density embedded applications.

  • Low Voltage Operation: 1.6V enables energy harvesting and single-cell battery use.
  • High Code Density: 256KB flash for complex applications.
  • DMA Controller: Offloads data movement, improving real-time performance.
  • Small Footprint: 64-VFQFN ideal for miniaturized IoT devices.

Wireless Sensor Networks

Low 1.6V operation and DMA support efficient data aggregation in battery-powered Zigbee/Sub-GHz nodes.

Medical Wearables

Its compact 64-VFQFN package and 256KB flash enable continuous health monitoring with complex algorithms.

Smart Agriculture

Robust PWM and WDT handle irrigation control and soil sensor reading in outdoor environments.

Industrial IoT Gateways

DMA and 32MHz AVR core process multiple protocol stacks for edge connectivity.

Energy Harvesting Devices

The 1.6V minimum supply allows direct operation from solar cells or TEG modules.

Security Systems

Large flash supports encryption libraries for access control panels and alarm systems.

Q: What is the core of ATXMEGA256A3U-MHR?
A: It uses an 8/16-bit AVR core at 32MHz.
Q: How much flash memory is included?
A: It has 256KB of flash.
Q: What is the voltage range?
A: It operates from 1.6V to 3.6V.
Q: What package is this?
A: It is a 64-VFQFN exposed pad package.
Q: Does it have DMA?
A: Yes, it includes a DMA controller.
Base Product Number : ATXMEGA256A3U
16KB RAM 256KB Flash 32MHz 64-VFQFN 8/16-bit MCU ATXMEGA256A3U-MHR AVR DMA energy harvesting IoT low power PWM wearable
Q: What is the core of ATXMEGA256A3U-MHR?
A: It uses an 8/16-bit AVR core at 32MHz.
Q: How much flash memory is included?
A: It has 256KB of flash.
Q: What is the voltage range?
A: It operates from 1.6V to 3.6V.
Q: What package is this?
A: It is a 64-VFQFN exposed pad package.
Q: Does it have DMA?
A: Yes, it includes a DMA controller.