| PartNumber | ATSAMR21G16A-MU | ATSAMR21G16A-MF | ATSAMR21G16A-MFT |
| Description | RF Microcontrollers - MCU SAMR21 48pin 64K 85oC | RF Microcontrollers - MCU SAMR21 48pin 64K 125C | RF Microcontrollers - MCU SAMR21 48pin 64K T&R 125oC |
| Manufacturer | Microchip | Microchip | Microchip |
| Product Category | RF Microcontrollers - MCU | RF Microcontrollers - MCU | RF Microcontrollers - MCU |
| RoHS | Y | Y | Y |
| Core | ARM Cortex M0+ | - | ARM Cortex M0+ |
| Data Bus Width | 32 bit | - | 32 bit |
| Program Memory Size | 64 kB | - | 64 kB |
| Data RAM Size | 8 kB | - | 8 kB |
| Maximum Clock Frequency | 48 MHz | - | 48 MHz |
| ADC Resolution | 12 bit | - | 12 bit |
| Operating Supply Voltage | 3.3 V | - | 3.3 V |
| Maximum Operating Temperature | + 85 C | - | + 125 C |
| Package / Case | QFN-48 | - | QFN-48 |
| Mounting Style | SMD/SMT | - | SMD/SMT |
| Packaging | Tray | Tray | Reel |
| Program Memory Type | Flash | - | Flash |
| Series | ATSAMR21 | ATSAMR21 | ATSAMR21 |
| Brand | Microchip Technology / Atmel | Microchip Technology / Atmel | Microchip Technology / Atmel |
| Data RAM Type | SRAM | - | SRAM |
| Interface Type | SPI, UART, USB | - | SPI, UART, USB |
| Number of I/Os | 28 I/O | - | 28 I/O |
| Minimum Operating Temperature | - 40 C | - | - 40 C |
| Moisture Sensitive | Yes | Yes | - |
| Number of ADC Channels | 8 Channel | - | 8 Channel |
| Processor Series | SAMR21G | - | SAMR21G |
| Product Type | RF Microcontrollers - MCU | RF Microcontrollers - MCU | RF Microcontrollers - MCU |
| Factory Pack Quantity | 416 | 416 | 4000 |
| Subcategory | Wireless & RF Integrated Circuits | Wireless & RF Integrated Circuits | Wireless & RF Integrated Circuits |
| Tradename | SMART | SMART | SMART |
| Unit Weight | 0.005309 oz | - | 0.005309 oz |