| PartNumber | ATXMEGA256A3BU-MH | ATXMEGA256A3BU-MHR | ATXMEGA256A3BU-MN |
| Description | 8-bit Microcontrollers - MCU AVR8 256KB FLSH 16KB | 8-bit Microcontrollers - MCU AVR XMEGA 256KB FLSH 4KB EE 16K-64QFN | 8-bit Microcontrollers - MCU AVR XMEGA, 256KB FLASH, 4KB EE, 16KB SRAM - QFN, 105C, Green 1.6-3.6V |
| Manufacturer | Microchip | Microchip | Microchip |
| Product Category | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU |
| RoHS | Y | N | Y |
| Mounting Style | SMD/SMT | - | - |
| Package / Case | QFN-64 | VQFN-64 | - |
| Series | XMEGA A3BU | XMEGA A3BU | XMEGA A3BU |
| Core | AVR | - | AVR |
| Data Bus Width | 8 bit/16 bit | - | - |
| Maximum Clock Frequency | 32 MHz | - | - |
| Program Memory Size | 256 kB | - | - |
| Data RAM Size | 16 kB | - | - |
| Number of I/Os | 50 I/O | - | - |
| Operating Supply Voltage | 1.6 V to 3.6 V | - | - |
| Minimum Operating Temperature | - 40 C | - | - |
| Maximum Operating Temperature | + 85 C | - | - |
| Packaging | Tray | Reel | - |
| Product | MCU | - | - |
| Brand | Microchip Technology / Atmel | Microchip Technology / Atmel | Microchip Technology / Atmel |
| Number of Timers/Counters | 7 Timer | - | - |
| Processor Series | AVR XMEGA | - | - |
| Product Type | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU |
| Factory Pack Quantity | 260 | 4000 | 160 |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | Microcontrollers - MCU |
| Tradename | XMEGA | XMEGA | XMEGA |
| Unit Weight | 0.007277 oz | - | - |