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| Part Number | SI4021-A1-FTR |
| Datasheet | SI4021-A1-FTR datasheet |
| Description | RF TX IC FSK 433/868MHZ 16TSSOP |
| Manufacturer | Silicon Labs |
| Series | EZRadio® |
| Part Status | Not For New Designs |
| Frequency | 433MHz, 868MHz, 915MHz |
| Applications | General Purpose |
| Modulation or Protocol | FSK, OOK |
| Data Rate (Max) | 512kbps |
| Power - Output | 8dBm |
| Current - Transmitting | 24mA |
| Data Interface | PCB, Surface Mount |
| Antenna Connector | PCB, Surface Mount |
| Memory Size | - |
| Features | - |
| Voltage - Supply | 2.2V ~ 5.4V |
| Operating Temperature | -40°C ~ 85°C |
| Package / Case | 16-TSSOP (0.173", 4.40mm Width) |