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See Product Specifications
| Part Number: | EFR32FG23A020F256GM40-B | 
| Category: | RF/IF and RFID | 
| Subcategory: | RF Transceiver ICs | 
| Manufacturer: | Silicon Labs | 
| Packaging: | Tray | 
| Product Status: | Active | 
| Type: | TxRx + MCU | 
| RF Family/Standard: | General ISM < 1GHz | 
| Protocol: | Flex Gecko | 
| Modulation: | 2FSK, 4FSK, DSSS, GFSK, GMSK, OOK, OQPSK | 
| Frequency: | 110MHz ~ 223MHz, 223MHz ~ 372MHz, 372MHz ~ 557MHz, 557MHz ~ 727MHz, 742MHz ~ 970MHz | 
| Data Rate (Max): | 2Mbps | 
| Power - Output: | 20dBm | 
| Sensitivity: | -125.8dBm | 
| Memory Size: | 256kB Flash, 32kB RAM | 
| Serial Interfaces: | I²C, I²S, SPI, UART | 
| GPIO: | 23 | 
| Voltage - Supply: | 1.71V ~ 3.8V | 
| Current - Receiving: | 3.7mA ~ 9.5mA | 
| Current - Transmitting: | 8.2mA ~ 90.6mA | 
| Operating Temperature: | -40°C ~ 85°C (TA) | 
| Mounting Type: | Surface Mount | 
| Package / Case: | 40-VFQFN Exposed Pad | 
| Supplier Device Package: | 40-QFN (5x5) |