SI4431-A0-FM Silicon Laboratories Inc, SI4431-A0-FM Datasheet - Page 103

• Manufacturer Part Number: SI4431-A0-FM
• Description: IC TXRX ISM 930MHZ 3.6V 20-QFN
• Manufacturer: Silicon Laboratories Inc

Specifications of SI4431-A0-FM

• Package / Case: 20-QFN
• Mfg Application Notes: Transitioning SI4430/31 to Rev B
• Frequency: 240MHz ~ 930MHz
• Data Rate - Maximum: 128kbps
• Modulation Or Protocol: FSK, GFSK, OOK
• Power - Output: 13dBm
• Sensitivity: -118dBm
• Voltage - Supply: 1.8 V ~ 3.6 V
• Current - Receiving: 18.5mA
• Current - Transmitting: 28mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Number Of Receivers: 2
• Number Of Transmitters: 1
• Wireless Frequency: 240 MHz to 930 MHz
• Output Power: 13 dBm
• Operating Supply Voltage: 1.8 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Maximum Supply Current: 28 mA
• Minimum Operating Temperature: - 40 C
• Modulation: FSK, GFSK, OOK
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Applications: -
• Memory Size: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 336-1633-5

Register 17h. Wake-Up Timer Value 1
Register 18h. Wake-Up Timer Value 2
Register 19h. Low-Duty Cycle Mode Duration
Reset value = xxxxxxxx
Reset value = xxxxxxxx
Reset value = 00000001
Name
*Note: The period of the wake-up timer can be calculated as T
Name
*Note: The period of the wake-up timer can be calculated as T
Name
*Note: The period of the low-duty cycle ON time can be calculated as T
Type
Type
Type
Bit
Bit
Bit
7:0
7:0
7:0
Bit
Bit
Bit
as in the wake-up timer setting in "Register 14h. Wake-Up Timer Period 1".
wtm[15:8]
wtm[7:0]
ldc[7:0]
Name
Name
Name
D7
D7
D7
Wake Up Timer Current Mantissa (M) Value*.
Wake Up Timer Current Mantissa (M) Value*.
Low-Duty Cycle Mode Duration (LDC)*.
If enabled, the LDC will start together when the WUT is supposed to start, and the dura-
tion of the LDC is specified by the address 19h and the equation that goes with it. In order
for the LDC to work, the LDC value has to be smaller than the M value specified in regis-
ters 15h and 16h.
LDC = 0 is not allowed here. Write at least decimal 1.
D6
D6
D6
D5
D5
D5
Preliminary Rev. 0.4
D4
D4
D4
wtm[15:8]
wtm[7:0]
WUT
WUT
ldc[7:0]
R/W
R
R
= (4 x M x 2
= (4 x M x 2
Function
Function
Function
LDC_ON
D3
D3
D3
R
R
= (4 x LDC x 2
) / 32.768 ms.
) / 32.768 ms.
D2
D2
D2
R
) / 32.768 ms. R is the same
D1
D1
D1
Si4431
D0
D0
D0
103