SI4020-I1-FT Silicon Laboratories Inc, SI4020-I1-FT Datasheet - Page 13

• Manufacturer Part Number: SI4020-I1-FT
• Description: IC TX FSK 915MHZ 5.4V 16-TSSOP
• Manufacturer: Silicon Laboratories Inc

Specifications of SI4020-I1-FT

• Package / Case: 16-TSSOP
• Frequency: 315MHz, 433MHz, 868MHz, and 915MHz
• Modulation Or Protocol: FSK, OOK
• Data Rate - Maximum: 256 kbps
• Current - Transmitting: 14mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Voltage - Supply: 2.2 V ~ 5.4 V
• Operating Temperature: -40°C ~ 85°C
• Operating Frequency: 315 MHz to 915 MHz
• Mounting Style: SMD/SMT
• Operating Supply Voltage: 2.2 V to 5.4 V
• Supply Current: 1.5 mA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Power - Output: -
• Applications: -
• Memory Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 336-1621-5

Control Commands
Note: In the following tables the POR column shows the default values of the command registers after power-on.
1. Configuration Setting Command
10
11
1
2
3
4
5
6
7
8
9
bit
Control Command
Configuration Setting Command
Power Management Command
Frequency Setting Command
Data Rate Command
Power Setting Command
Low Battery Detector Command
Sleep Command
Push-Button Command
Wake-Up Timer Command
Data Transmit Command
Status Register Command
15
1
d2
0
0
0
0
1
1
1
1
14
0
b1
0
0
1
1
d1
0
0
1
1
0
0
1
1
13
0
b0
d0
0
1
0
1
0
1
0
1
0
1
0
1
12
b1
Frequency Band [MHz]
Clock Output Frequency
11
b0
315
433
868
915
[MHz]
10
10
d2
1
1.25
1.66
2
2.5
3.33
5
d1
9
Related Parameters/Functions
Frequency band, microcontroller clock output, crystal load capacitance, frequency
deviation
Crystal oscillator, synthesizer, power amplifier, low battery detector, wake-up timer, clock
output buffer
Carrier frequency
Bit rate (at EEPROM mode only)
Nominal output power, OOK mode
Low battery threshold limit
Length of the clock tail after power down
Push-button related functions
Wake-up time period
Data transmission
Transmitter status read
d0
8
x3
7
x2
6
The resulting output frequency can be calculated as:
where:
x1
5
f
f
M is the three bit binary number <m2 : m0>
SIGN = (ms) XOR (FSK input)
out
0
x3
is the channel center frequency (see the next command)
0
0
0
0
1
1
= f
x0
4
0
– (-1)
x2
0
0
0
0
1
1
ms
3
SIGN
x1
0
0
1
1
1
1
m2
* (M + 1) * (30 kHz)
2
x0
0
1
0
1
0
1
m1
1
Crystal Load Capacitance [pF]
m0
…
0
10.0
15.5
16.0
8080h
8.5
9.0
9.5
POR
Si4020
13