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| PartNumber | SI4431-B1-FM | SI4431-B1-FMR | SI4431-B1-FMRSILICONLAB |
| Description | RF Transceiver +13 dBm sub-GHz transmitter | RF Transceiver +13 dBm sub-GHz transmitter | |
| Manufacturer | Silicon Laboratories | Silicon Laboratories | - |
| Product Category | RF Transceiver | RF Transceiver | - |
| RoHS | Y | Y | - |
| Type | Sub-GHz | Sub-GHz | - |
| Frequency Range | 240 MHz to 930 MHz | - | - |
| Maximum Data Rate | 256 kb/s | - | - |
| Modulation Format | FSK, GFSK, OOK | - | - |
| Supply Voltage Min | 1.8 V | - | - |
| Supply Voltage Max | 3.6 V | - | - |
| Supply Current Receiving | 18.5 mA | - | - |
| Supply Current Transmitting | 30 mA | - | - |
| Output Power | 13 dBm | - | - |
| Minimum Operating Temperature | - 40 C | - | - |
| Maximum Operating Temperature | + 85 C | - | - |
| Interface Type | SPI | - | - |
| Package / Case | QFN-20 | - | - |
| Packaging | Tube | Reel | - |
| Sensitivity | - 121 dBm | - | - |
| Series | SI4431 | SI4431 | - |
| Brand | Silicon Labs | Silicon Labs | - |
| Mounting Style | SMD/SMT | - | - |
| Supply Current Max | 30 mA | - | - |
| Product Type | RF Transceiver | RF Transceiver | - |
| Factory Pack Quantity | 490 | 2500 | - |
| Subcategory | Wireless & RF Integrated Circuits | Wireless & RF Integrated Circuits | - |
| Tradename | EZRadioPRO | EZRadioPRO | - |
| Unit Weight | 0.001515 oz | - | - |
| Moisture Sensitive | - | Yes | - |