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| PartNumber | AT32UC3A4256-C1UT | AT32UC3A4256-C1UR | AT32UC3A4256HHB-C1UR |
| Description | 32-bit Microcontrollers - MCU 256k flash Ind | 32-bit Microcontrollers - MCU 256k flash Ind | 32-bit Microcontrollers - MCU EDBG - EDBG |
| Manufacturer | Microchip | Microchip | Microchip |
| Product Category | 32-bit Microcontrollers - MCU | 32-bit Microcontrollers - MCU | 32-bit Microcontrollers - MCU |
| RoHS | Y | Y | Y |
| Series | AT32UC3A4 | AT32UC3A4 | AT32UC3A4 |
| Core | AVR | AVR | - |
| Data Bus Width | 32 bit | 32 bit | - |
| Operating Supply Voltage | 1.8 V, 3.3 V | 1.8 V, 3.3 V | - |
| Packaging | Tray | Reel | Reel |
| Brand | Microchip Technology / Atmel | Microchip Technology / Atmel | Microchip Technology / Atmel |
| Moisture Sensitive | Yes | - | - |
| Processor Series | AT32UC3A4 | AT32UC3A4 | AT32UC3A4 |
| Product Type | 32-bit Microcontrollers - MCU | 32-bit Microcontrollers - MCU | 32-bit Microcontrollers - MCU |
| Factory Pack Quantity | 260 | 4000 | 4000 |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | Microcontrollers - MCU |
| Tradename | AVR | AVR | AVR |