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| PartNumber | SI4721-B20-GM | SI4721-B20-GMR | SI4721-B-EVB |
| Description | RF Transceiver FM Tx/Rx with RDS and receive power scan | RF Transceiver FM Tx/Rx with RDS and receive power scan | RF Development Tools Si4721-B EVB. 3x3x0.55 20-pin QFN. Use for either Si4720 or Si4721-B20 |
| Manufacturer | Silicon Laboratories | Silicon Laboratories | Silicon Laboratories |
| Product Category | RF Transceiver | RF Transceiver | RF Development Tools |
| RoHS | Y | Y | Y |
| Frequency Range | 76 MHz to 108 MHz | - | - |
| Modulation Format | FM | - | - |
| Supply Voltage Min | 2.7 V | - | - |
| Supply Voltage Max | 5.5 V | - | - |
| Supply Current Receiving | 19.2 mA | - | - |
| Supply Current Transmitting | 18.8 mA | - | - |
| Minimum Operating Temperature | - 20 C | - | - |
| Maximum Operating Temperature | + 85 C | - | - |
| Interface Type | 2-Wire, 3-Wire | - | - |
| Package / Case | QFN-20 | - | - |
| Packaging | Tray | Reel | - |
| Series | SI4721 | SI4721 | - |
| Brand | Silicon Labs | Silicon Labs | Silicon Labs |
| Mounting Style | SMD/SMT | - | - |
| Maximum Operating Frequency | 108 MHz | - | - |
| Moisture Sensitive | Yes | Yes | - |
| Number of Receivers | 1 | - | - |
| Number of Transmitters | 1 | - | - |
| Product Type | RF Transceiver | RF Transceiver | RF Development Tools |
| Factory Pack Quantity | 624 | 2500 | 1 |
| Subcategory | Wireless & RF Integrated Circuits | Wireless & RF Integrated Circuits | Development Tools |
| Unit Weight | 0.000582 oz | - | - |