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| PartNumber | ATUC256L3U-AUT | ATUC256L3U-AUR | ATUC256L3U |
| Description | 32-bit Microcontrollers - MCU UC3L-256KB Flash 64QFP 85C green TRAY | 32-bit Microcontrollers - MCU UC3L-256KB Flash 64QFP 85C green T&R | |
| Manufacturer | Microchip | Microchip | Atmel |
| Product Category | 32-bit Microcontrollers - MCU | 32-bit Microcontrollers - MCU | Embedded - Microcontrollers |
| RoHS | Y | Y | - |
| Mounting Style | SMD/SMT | - | - |
| Package / Case | TQFP-64 | - | - |
| Series | UC3 L | UC3 L | AVRR32 UC3 L |
| Core | AVR | AVR | AVR |
| Data Bus Width | 32 bit | 32 bit | 32 bit |
| Maximum Clock Frequency | 50 MHz | - | - |
| Program Memory Size | 156 kB | - | 256KB (256K x 8) |
| Data RAM Size | 32 kB | - | - |
| Operating Supply Voltage | 1.98 V to 3.6 V | - | - |
| Minimum Operating Temperature | - 40 C | - | - |
| Maximum Operating Temperature | + 85 C | - | - |
| Packaging | Tray | Reel | Digi-ReelR Alternate Packaging |
| Product | MCU | MCU | MCU |
| Brand | Microchip Technology / Atmel | Microchip Technology / Atmel | - |
| Moisture Sensitive | Yes | - | - |
| Processor Series | ATUC | ATUC | ATUC |
| Product Type | 32-bit Microcontrollers - MCU | 32-bit Microcontrollers - MCU | - |
| Factory Pack Quantity | 160 | 1500 | - |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | - |
| Tradename | UC3 | UC3 | UC3 |
| Unit Weight | 0.012720 oz | - | - |
| Package Case | - | - | 64-TQFP |
| Operating Temperature | - | - | -40°C ~ 85°C (TA) |
| Supplier Device Package | - | - | 64-TQFP (10x10) |
| Number of I O | - | - | 51 |
| Speed | - | - | 50MHz |
| EEPROM Size | - | - | - |
| Core Processor | - | - | AVR |
| RAM Size | - | - | 32K x 8 |
| Program Memory Type | - | - | FLASH |
| Peripherals | - | - | Brown-out Detect/Reset, DMA, POR, PWM, WDT |
| Connectivity | - | - | I2C, SPI, UART/USART, USB |
| Voltage Supply Vcc Vdd | - | - | 1.62 V ~ 3.6 V |
| Core Size | - | - | 32-Bit |
| Data Converters | - | - | A/D 8x12b |
| Oscillator Type | - | - | Internal |