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| PartNumber | AT32UC3A3128-ALUR | AT32UC3A3128-ALUT | AT32UC3A3128-CTUR |
| Description | 32-bit Microcontrollers - MCU 128KB, 144LQFP Ind | 32-bit Microcontrollers - MCU 128KB, 144LQFP Ind | 32-bit Microcontrollers - MCU 128KB, 144FBGA Ind, w/AES Mod. |
| 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 | LQFP-144 | LQFP-144 | TBGA-144 |
| Series | AT32UC3A3 | AT32UC3A3 | AT32UC3A3 |
| Core | AVR | AVR | AVR |
| Data Bus Width | 32 bit | 32 bit | 32 bit |
| Maximum Clock Frequency | 66 MHz | 66 MHz | 66 MHz |
| Program Memory Size | 128 kB | 128 kB | 128 kB |
| Data RAM Size | 64 kB | 64 kB | 64 kB |
| ADC Resolution | No ADC | 10 bit | No ADC |
| Number of I/Os | 23 I/O | 110 I/O | 23 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 | Reel | Tray | Reel |
| Height | 1.6 mm | 1.6 mm | 1.2 mm |
| Length | 20.1 mm | 20.1 mm | 11 mm |
| Program Memory Type | Flash, SRAM | Flash | Flash, SRAM |
| Width | 20.1 mm | 20.1 mm | 11 mm |
| Brand | Microchip Technology / Atmel | Microchip Technology / Atmel | Microchip Technology / Atmel |
| Data RAM Type | SRAM | SRAM | SRAM |
| Data ROM Type | EEPROM | EEPROM | EEPROM |
| Interface Type | 2-Wire, I2S, JTAG, SPI, USART | 2-Wire, I2S, JTAG, SPI, USART | 2-Wire, I2S, JTAG, SPI, USART |
| Moisture Sensitive | Yes | Yes | - |
| Number of Timers/Counters | 4 Timer | 4 Timer | 4 Timer |
| Processor Series | AT32UC3A3 | AT32UC3A3 | AT32UC3A3 |
| Product Type | 32-bit Microcontrollers - MCU | 32-bit Microcontrollers - MCU | 32-bit Microcontrollers - MCU |
| Factory Pack Quantity | 800 | 60 | 2000 |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | Microcontrollers - MCU |
| Supply Voltage Max | 1.89 V, 3.6 V | 1.95 V, 3.6 V | 1.89 V, 3.6 V |
| Supply Voltage Min | 1.81 V, 2.7 V, 3 V | 1.65 V, 3 V | 1.81 V, 2.7 V, 3 V |
| Tradename | AVR | AVR | AVR |
| Unit Weight | 0.045518 oz | 0.045518 oz | - |
| Number of ADC Channels | - | 8 | - |