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| Part Number | ATSAML21J16B-MUT | 
| Datasheet | ATSAML21J16B-MUT datasheet | 
| Description | IC MCU 32BIT 64KB FLASH 64QFN | 
| Manufacturer | Microchip Technology | 
| Series | SAM L21J | 
| Part Status | Active | 
| Core Processor | ARM® Cortex®-M0+ | 
| Core Size | 32-Bit | 
| Speed | 48MHz | 
| Connectivity | I²C, LINbus, SCI, SPI, UART/USART, USB | 
| Peripherals | DMA, POR, PWM, WDT | 
| Number of I/O | 51 | 
| Program Memory Size | 64KB (64K x 8) | 
| Program Memory Type | FLASH | 
| EEPROM Size | - | 
| RAM Size | 8K x 8 | 
| Voltage - Supply (Vcc/Vdd) | 1.62V ~ 3.63V | 
| Data Converters | A/D 20x12b; D/A 2x12b | 
| Oscillator Type | Internal | 
| Operating Temperature | -40°C ~ 85°C (TA) | 
| Package / Case | Surface Mount | 
| Supplier Device Package | 64-VFQFN Exposed Pad | 
| Base Part Number | 64-QFN (9x9) |