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HOME > PRODUCTS > FSK FRONT-END MODULES > RF4421 : SI4421 ADVANCED RF MODULE FOR RELIABLE WI...
RF4421 : Si4421 Advanced RF Module For Reliable Wireless Connectivity
- RF transceiver module RF4421 adopts si4421, from Silicon Lab, a highly integrated wireless ISM frequency range transceiver chip. With favorable RF parameter performance, it can be wildly used in the wireless system which needs to pass the FCC, ETSI and etc.
- RF4421 is manufactured and tested strictly using lead-free process and complies with RoHS and Reach standards.
| Parameters | Min. | Typ. | Max. | Unit | Condition |
| Operating Conditions | |||||
| Operating power | 2.2 | 3.3 | 3.8 | V | |
| Operating temperature | -40 | 85 | ℃ | ||
| Current Consumption | |||||
| RX current | 11 | mA | |||
| TX current | 22 | mA | @7dBm | ||
| Sleep curent | 0.3 | uA | |||
| RF Parameters | |||||
| Frequency | 403 | 433 | 463 | MHz | @433MHz |
| 838 | 868 | 898 | MHz | @868MHz | |
| Output power | -17.5 | 7 | dBm | ||
| Sensitivity | -105 | dBm | @data=1.2kbps | ||
| Modulation | (G)FSK |
| Frequency | 433MHz,868MHz,915MHz |
| Interface | SPI |
Features of RF transceiver module RF4421
- Frequency: 433/868/915MHz
- Sensitivity: -105 dBm
- Max output power:7 dBm
- Max rate:115.2 Kbps(Digital mode) 256 kbps(Simulation mode)
- Modulation: FSK
- Low consumption shutdown mode
- Time wake up function
- Preamble detection
- 16-byte transmit and receive data FIFO
- Temperature: -40 ~ +85°C
- Weight: 0.6 g
Applications of RF transceiver module RF4421
- Remote control
- Home security alarm and remote keyless entry
- Home automation telemetry
- Toy control
- Sensor networks
- Tire Pressure Monitoring
- Health Monitoring
- Tag reader
| Pin No. | Pin | Description |
| 1 | GND | Connected to power ground |
| 2 | NINT | Interrupt input/Efficient data detection output |
| 3 | DATA | Receiver data output(not in FIFO mode) |
| 4 | CLK | Microcontroller Clock output |
| 5 | VCC | Connect to 3.3V positive power |
| 6 | SDO | Data output for SPI interface |
| 7 | SDI | Data input for SPI interface |
| 8 | SCLK | Clock input for SPI interface |
| 9 | nSEL | Serial data selection for SPI interfaces. |
| 10 | nIRQ | Interrupt output |
| 11 | ARSSI | Analog RSSI output |
| 12 | GND | Connected to power ground |
| 13 | ANT | Connected to 50 ohm coaxial antenna |
| 14 | GND | Connected to power ground |
