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| PartNumber | AT32UC3B1128-AUT | AT32UC3B1128-AUR | AT32UC3B1128-Z1UR |
| Description | 32-bit Microcontrollers - MCU 32-bit 128KB Flash | 32-bit Microcontrollers - MCU 128KB, 48QFN 85deg. Green | 32-bit Microcontrollers - MCU 128KB, 48QFN 85deg. Green |
| Manufacturer | Microchip | Microchip | Microchip |
| Product Category | 32-bit Microcontrollers - MCU | 32-bit Microcontrollers - MCU | 32-bit Microcontrollers - MCU |
| RoHS | Y | Y | Y |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | TQFP-48 | TQFP-48 | QFN EP |
| Series | AT32UC3B1 | AT32UC3B1 | AT32UC3B1 |
| Core | AVR | AVR | AVR |
| Data Bus Width | 32 bit | 32 bit | 32 bit |
| Maximum Clock Frequency | 60 MHz | 60 MHz | 60 MHz |
| Program Memory Size | 128 kB | 128 kB | 128 kB |
| Data RAM Size | 32 kB | 32 kB | 32 kB |
| ADC Resolution | 10 bit | 10 bit | 10 bit |
| Number of I/Os | 28 I/O | 28 I/O | 28 I/O |
| Operating Supply Voltage | 1.8 V, 3.3 V | 1.8 V, 3.3 V | 1.8 V, 3.3 V |
| Minimum Operating Temperature | - 40 C | - 40 C | - 40 C |
| Maximum Operating Temperature | + 85 C | + 85 C | + 85 C |
| Packaging | Tray | Reel | Reel |
| Height | 1.05 mm | 1.05 mm | 0.95 mm |
| Length | 7 mm | 7 mm | 7 mm |
| Product | MCU | - | - |
| Program Memory Type | Flash | Flash | Flash |
| Width | 7 mm | 7 mm | 7 mm |
| Brand | Microchip Technology / Atmel | Microchip Technology / Atmel | Microchip Technology / Atmel |
| Interface Type | 2-Wire, SPI, USART | 2-Wire, SPI, USART | 2-Wire, SPI, USART |
| Moisture Sensitive | Yes | - | - |
| Number of ADC Channels | 6 | 6 | 6 |
| Number of Timers/Counters | 3 Timer | 3 Timer | 3 Timer |
| Processor Series | AT32UC3x | AT32UC3x | AT32UC3x |
| Product Type | 32-bit Microcontrollers - MCU | 32-bit Microcontrollers - MCU | 32-bit Microcontrollers - MCU |
| Factory Pack Quantity | 250 | 2500 | 4000 |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | Microcontrollers - MCU |
| Supply Voltage Max | 1.95 V, 3.6 V | 1.95 V, 3.6 V | 1.95 V, 3.6 V |
| Supply Voltage Min | 1.65 V, 3 V | 1.65 V, 3 V | 1.65 V, 3 V |
| Tradename | AVR | AVR | AVR |
| Unit Weight | 0.319998 oz | 0.319998 oz | - |