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| PartNumber | SI4021-A1-FT | SI4021 | SI4021-A0-FTR |
| Description | RF Transmitter TX SubG | ||
| Manufacturer | Silicon Laboratories | - | - |
| Product Category | RF Transmitter | - | - |
| RoHS | Y | - | - |
| Type | Universal ISM Band | - | - |
| Operating Frequency | 430.24 MHz to 929.27 MHz | - | - |
| Operating Supply Voltage | 2.2 V to 5.4 V | - | - |
| Maximum Operating Temperature | + 85 C | - | - |
| Package / Case | TSSOP-16 | - | - |
| Mounting Style | SMD/SMT | - | - |
| Packaging | Tube | - | - |
| Supply Voltage Max | 5.4 V | - | - |
| Supply Voltage Min | 2.2 V | - | - |
| Output Power | 8 dBm | - | - |
| Series | Si4021 | - | - |
| Brand | Silicon Labs | - | - |
| Minimum Operating Temperature | - 40 C | - | - |
| Modulation Format | FSK, OOK | - | - |
| Moisture Sensitive | Yes | - | - |
| Operating Supply Current | 300 nA | - | - |
| Product Type | RF Transmitter | - | - |
| Factory Pack Quantity | 96 | - | - |
| Subcategory | Wireless & RF Integrated Circuits | - | - |
| Supply Current Transmitting | 24 mA | - | - |
| Unit Weight | 0.002037 oz | - | - |