Product Details

FSK 433MHz RF4431 wireless transceiver module

Brief description:

RF4431 adopts Silicon Labs Si4431 RF chip, which is a highly integrated wireless ISM band transceiver chip. Extremely high receive sensitivity (-121 dBm) and +13 dBm output power ensure that the covering of the range and improve the data link performance. Built-in antenna diversity and the hopping function can be used to aggressively improve the performance.

Product Picture:

Electronic Specifications:

Parameter	Min.	Typ.	Max.	Unit	Conditions
Operation conditions
Supply Voltage	1.8	3.3	3.6	V
Operating Temperature	-40	25	85	°C
Current consumption
RX Current		18.5		mA
TX current		35		mA	@13dBm
Sleep Current		<1		uA
RF parameters
Frequency	403	433	463	MHZ	@433MHZ
Frequency	838	868	898	MHZ	@868MHZ
Air data rate	0.123		256	Kbps	FSK
Output power	-8		13	dBm
Sensitivity		-118		dBm	@data=1.2kbps,Fdev=30kHZ

Features:
*Frequency Range: 433/868(Customizable 240-930 MHZ)
*Sensitivity up to -118dBm
*Data transfer rate:0.123-256 kbps
*FSK,GFSK and OOKModulation mode
*1.8-3.6 V Power supply
*Ultra-low consumption shutdown mode
*Digital received signal strength indicator (RSSI)
*Timed wake-up function
*The antenna automatically match and two-way switch control
*Configurable packet structure
*Preamble detection
*64-byte transmit and receive data register(FIFO)
*Low-power 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

Application:
*Remote control
*Remote meter reading
*Home security alarm and remote keyless entry
*Sensor networks
*Industrial control
*Tire Pressure Monitoring
*Home automation telemetry
*Health Monitoring
*Personal data records
*Wireless PC peripherals
*Toy control
*Tag reader

Schematic:

Pinout:

Pin Number	Pin Definitions	Description
1	GND	Connected to power ground
2	GPIO0	General-purpose digital I / O can be configured to perform a variety of functions, including: microcontroller clock output FIFO state, power-on reset, wake-up timer, low battery voltage detection TRSW AntDiversity control ,I GPIO configuration through registersregisters, address 0BH 0CH and 0DH
3	GPIO1
4	GPIO2
5	VCC	Positive power supply3.3V
6	SDO	0~VDD Vdigital output, providing serial readback function of the internal control registers
7	SDI	Serial data input. 0 ~ VDD V digital input. The pin 4-wire serial data stream of serial data bus
8	SCLK	Serial clock input. 0 ~ VDD V digital input. This pin provides a 4-wire serial data clock function
9	nSEL	The serial interface input pin. 0 ~ VDD V digital input. This pin to 4-wire serial data bus select / enable function, this signal is also used, said the burst read / write mode.
10	nIRQ	Interrupt output pin
11	SDN	Close the input pin. 0 ~ VDD V digital input. In addition to all modes of shutdown mode SDN = 0. When SDN = 1 Shi chip will be completely closed and the register contents will be lost.
12	GND	Connected to power ground
13	ANT	From 50 ohm coaxial antenna
14	GND	Connected to power ground

Machine Dimensions:

Spectrogram:

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