SI4020-I1-FT Silicon Laboratories Inc, SI4020-I1-FT Datasheet - Page 25

• 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

Sensitive Reset Enabled, Ripple on V
Sensitive reset disabled:
Software reset
Software reset can be issued by sending the appropriate control command (described at the end of the section) to the chip. The
result of the command is the same as if power-on reset was occurred.
V
During the reset event (caused by power-on, fast positive spike on the supply line or software reset command) it is very important to
keep the V
getting out from reset state. To avoid this phenomenon use adequate filtering on the power supply line to keep the level of the
disturbing signal below 10mV
regulator is used to supply the radio, switching noise may be present on the V
how to decrease the ripple of the regulator IC and/or how to shift the switching frequency.
Related control commands
“Low Battery Detector Command”
“SW Reset Command”
dd
output
output
nRes
nRes
line filtering
250mV
1.6V
V
H
L
V
H
L
dd
dd
Setting bit<6> to high will change the reset mode to normal from the default sensitive.
Issuing FF00h command will trigger software reset. See the Wake-up Timer Command.
dd
line as smooth as possible. Noise or periodic disturbing signal superimposed the supply voltage may prevent the part
Reset threshold voltage
Reset threshold voltage
(600mV)
(600mV)
p-p
in the DC – 50kHz range for 200ms from V
dd
:
Reset ramp line
(100mV/ms)
Reset ramp line
(100mV/ms)
dd
dd
time
time
ramp start.. Typical example when a switch-mode
line. Follow the manufacturer’s recommendations
Si4020
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