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| Part Number: | EFR32BG21B020F512IM32-B | 
| Category: | RF/IF and RFID | 
| Subcategory: | RF Transceiver ICs | 
| Manufacturer: | Silicon Labs | 
| Packaging: | Tray | 
| Product Status: | Active | 
| Type: | TxRx + MCU | 
| RF Family/Standard: | Bluetooth | 
| Protocol: | Bluetooth v5.1 | 
| Modulation: | GFSK | 
| Frequency: | 2.4GHz ~ 2.4835GHz | 
| Data Rate (Max): | 2Mbps | 
| Power - Output: | 20dBm | 
| Sensitivity: | -104.9dBm | 
| Memory Size: | 512kB Flash, 64kB RAM | 
| Serial Interfaces: | I²C, I²S, SPI, IrDA, UART, USART | 
| GPIO: | 20 | 
| Voltage - Supply: | 1.71V ~ 3.8V | 
| Current - Receiving: | 8.8mA ~ 9.8mA | 
| Current - Transmitting: | 9.3mA ~ 185mA | 
| Operating Temperature: | -40°C ~ 125°C (TA) | 
| Mounting Type: | Surface Mount | 
| Package / Case: | 32-VFQFN Exposed Pad | 
| Supplier Device Package: | 32-QFN (4x4) |