FSK 433MHz RF4431 wireless transceiver module

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

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

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