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| PartNumber | AT32UC3A3256-ALUR | AT32UC3A3256 | AT32UC3A3256-ALU |
| Description | 32-bit Microcontrollers - MCU 256KB, 144LQFP Ind | ||
| Manufacturer | Microchip | Atmel | - |
| Product Category | 32-bit Microcontrollers - MCU | Embedded - Microcontrollers | - |
| RoHS | Y | - | - |
| Mounting Style | SMD/SMT | - | - |
| Package / Case | LQFP-144 | - | - |
| Series | AT32UC3A3 | AVRR32 UC3 A3 | - |
| Core | AVR | - | - |
| Data Bus Width | 32 bit | - | - |
| Maximum Clock Frequency | 84 MHz | - | - |
| Program Memory Size | 256 kB | 256KB (256K x 8) | - |
| Data RAM Size | 128 kB | - | - |
| ADC Resolution | 10 bit | - | - |
| Number of I/Os | 110 I/O | - | - |
| Operating Supply Voltage | 3.3 V | - | - |
| Minimum Operating Temperature | - 40 C | - | - |
| Maximum Operating Temperature | + 85 C | - | - |
| Packaging | Reel | Digi-ReelR Alternate Packaging | - |
| Height | 1.6 mm | - | - |
| Length | 20.1 mm | - | - |
| Product | MCU | - | - |
| Program Memory Type | Flash | FLASH | - |
| Width | 20.1 mm | - | - |
| Brand | Microchip Technology / Atmel | - | - |
| Data RAM Type | SRAM | - | - |
| Interface Type | 2-Wire, I2S, JTAG, SPI, USART | - | - |
| Analog Supply Voltage | 3.6 V | - | - |
| DAC Resolution | 16 bit | - | - |
| I/O Voltage | 3.6 V | - | - |
| Moisture Sensitive | Yes | - | - |
| Number of ADC Channels | 8 Channel | - | - |
| Number of Timers/Counters | 6 Timer | - | - |
| Processor Series | AT32UC3A3 | - | - |
| Product Type | 32-bit Microcontrollers - MCU | - | - |
| Factory Pack Quantity | 800 | - | - |
| Subcategory | Microcontrollers - MCU | - | - |
| Supply Voltage Max | 3.6 V | - | - |
| Supply Voltage Min | 3 V | - | - |
| Tradename | AVR | - | - |
| Watchdog Timers | Watchdog Timer | - | - |
| Unit Weight | 0.045518 oz | - | - |
| Package Case | - | 144-LQFP | - |
| Operating Temperature | - | -40°C ~ 85°C (TA) | - |
| Supplier Device Package | - | 144-LQFP (20x20) | - |
| Number of I O | - | 110 | - |
| Speed | - | 66MHz | - |
| EEPROM Size | - | - | - |
| Core Processor | - | AVR | - |
| RAM Size | - | 128K x 8 | - |
| Peripherals | - | Brown-out Detect/Reset, POR, PWM, WDT | - |
| Connectivity | - | EBI/EMI, I2C, IrDA, Memory Card, SPI, SSC, UART/USART, USB OTG | - |
| Voltage Supply Vcc Vdd | - | 1.75 V ~ 3.6 V | - |
| Core Size | - | 32-Bit | - |
| Data Converters | - | A/D 8x10b | - |
| Oscillator Type | - | Internal | - |