| PartNumber | ATSAMR21G17A-MU | ATSAMR21G17A-MUT | ATSAMR21G18-MR210UA |
| Description | RF Microcontrollers - MCU SAMR21 48pin 128K | RF Microcontrollers - MCU SAMR21 48pin 128K T&R | Zigbee Modules (802.15.4) Smart Connect Module |
| Manufacturer | Microchip | Microchip | Microchip |
| Product Category | RF Microcontrollers - MCU | RF Microcontrollers - MCU | Zigbee Modules (802.15.4) |
| RoHS | Y | Y | Y |
| Core | ARM Cortex M0+ | ARM Cortex M0+ | - |
| Data Bus Width | 32 bit | 32 bit | - |
| Program Memory Size | 128 kB | 128 kB | - |
| Data RAM Size | 16 kB | 16 kB | - |
| Maximum Clock Frequency | 48 MHz | 48 MHz | - |
| ADC Resolution | 12 bit | 12 bit | - |
| Operating Supply Voltage | 3.3 V | 3.3 V | 1.8 V to 3.6 V |
| Maximum Operating Temperature | + 85 C | + 85 C | + 85 C |
| Package / Case | QFN-48 | QFN-48 | - |
| Mounting Style | SMD/SMT | SMD/SMT | - |
| Packaging | Tray | Reel | Tray |
| 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 | I2S, UART, USB |
| Number of I/Os | 28 I/O | 28 I/O | - |
| Minimum Operating Temperature | - 40 C | - 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 | Zigbee Modules |
| Factory Pack Quantity | 416 | 4000 | 1 |
| Subcategory | Wireless & RF Integrated Circuits | Wireless & RF Integrated Circuits | Wireless & RF Modules |
| Tradename | SMART | SMART | - |
| Unit Weight | 0.005309 oz | 0.005309 oz | 0.005309 oz |