- RF4438PRO adopts Silicon Lab EzradioPro2 RF transceiver si4438, which is a highly integrated wireless ISM band transceiver chip. The features of high sensitivity (-124 dBm), +20 dBm output power, low current consumption, 10PPM crystal, and good RF matching circuit make this module work well in hot/cold environment with reliable communication and long distance.
- RF4438PRO is manufactured and tested strictly using lead-free process and complies with RoHS and Reach standards.
Features
- Frequency:433MHz(customizable 425-525MHz)
- High Sensitivity up to -124dBm
- Max output power：20dBm
- 14mA @ receiver mode
- Data transfer rate：0.1-500Kbps
- (G)FSK, OOK Modulation mode
- 1.8-3.8 V Power supply
- Ultra-low consumption shutdown mode
- Digital received signal strength indicator (RSSI)
- Timed wake-up function
- Excellent antenna match circuit and bi-direction communication
- Configurable packet structure
- Preamble detection
- 64/128byte transmit and receive data register（FiFo）
- Low-battery detection
- Temperature sensor and 8-bit analog-to-digital converters
- Operating Temperature Range：-40 ~ + 85 °C
- Integrated voltage regulator
- Frequency hopping
- Power-on reset function
- Built-in crystal adjustment function
Applications
- Remote control
- Remote meter reading
- Home security alarm and remote keylessentry
- Industrial control
- Home automation remote sensing
- Individual data records
- Toys control
- Sensor network
- Tire pressure monitoring
- Health monitoring
- Wireless PC peripherals
- Tag reading and writing
| Parameter |
Min |
Typ |
Max |
Unit |
Condition |
| Working Condition |
| Working voltage range |
1.8 |
3.3 |
3.8 |
V |
|
| Temperature voltage |
-40 |
|
85 |
℃ |
|
| Current Consumption |
| Receiving current |
|
14 |
|
mA |
|
| Transmitting current |
|
85 |
|
mA |
@20dBm |
| Sleep current |
|
< 0.1 |
|
uA |
|
| Parameter |
| Frequency range |
425 |
433 |
463 |
MHz |
@433MHz |
| 470 |
490 |
510 |
MHz |
@470MHz |
| Modulation rate |
0.1 |
|
500 |
Kbps |
FSK |
| Output power range |
-20 |
|
20 |
dBm |
|
| Receiving sensitivity |
|
-124 |
|
dBm |
@data=500bps |
Typical Application Circuit
Pin Definition
| Pin NO. |
Pin Name |
Description |
| 1 |
GND |
Power ground |
| 2 |
NC |
NC |
| 3 |
GPIO0 |
GPIO0 of Si4468 |
| 4 |
GPIO1 |
GPIO1 of Si4468 |
| 5 |
VCC |
Positive power supply 3.3V |
| 6 |
SDO |
Serial data out for SPI interface. |
| 7 |
SDI |
Serial data in for SPI interface |
| 8 |
SCLK |
Serial data clock for SPI interface |
| 9 |
nSEL |
Serial data selection for SPI interfaces. |
| 10 |
nIRQ |
Interrupt output |
| 11 |
SDN |
Power down control. SDN = 1, power down SDN = 0, normal working |
| 12 |
GND |
Power ground |
| 13 |
GND |
power ground |
| 14 |
ANT |
Connect with 50 ohm coaxial antenna |
Mechanism Dimension
