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| PartNumber | SI4438-B1C-FMR | SI4438-B1C-FM | SI4438-B1C-ZM1R |
| Description | RF Transceiver +20/-124 dBm sub-GHz transmitter | RF Transceiver +20/-124 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 | 425 MHz to 525 MHz | 425 MHz to 525 MHz | - |
| Maximum Data Rate | 500 kb/s | 500 kb/s | - |
| Modulation Format | GFSK, OOK | FSK, GFSK, OOK | - |
| Supply Voltage Min | 1.8 V | 1.8 V | - |
| Supply Voltage Max | 3.6 V | 3.6 V | - |
| Supply Current Receiving | 14 mA | 14 mA | - |
| Supply Current Transmitting | 75 mA | 75 mA | - |
| Output Power | 20 dBm | 20 dBm | - |
| Minimum Operating Temperature | - 40 C | - 40 C | - |
| Maximum Operating Temperature | + 85 C | + 85 C | - |
| Interface Type | API, SPI | SPI | - |
| Package / Case | QFN-20 | QFN-20 | - |
| Packaging | Reel | Tray | - |
| Sensitivity | - 124 dBm | - 124 dBm | - |
| Series | SI4438 | SI4438 | - |
| Brand | Silicon Labs | Silicon Labs | - |
| Mounting Style | SMD/SMT | SMD/SMT | - |
| Supply Current Max | 10 uA | - | - |
| Maximum Operating Frequency | 525 MHz | - | - |
| Moisture Sensitive | Yes | - | - |
| Number of Receivers | 1 | - | - |
| Number of Transmitters | 1 | - | - |
| Product Type | RF Transceiver | RF Transceiver | - |
| Factory Pack Quantity | 2500 | 490 | - |
| Subcategory | Wireless & RF Integrated Circuits | Wireless & RF Integrated Circuits | - |
| Tradename | EZRadioPRO | EZRadioPRO | - |
| Unit Weight | 0.000582 oz | 0.000582 oz | - |