Si4020/21 RF Transmitters​

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 Si4020 and Si4021 single-chip, low-power, multi-channel FSK/OOK RF transmitters

​The Si4020 and Si4021 single-chip, low-power, multi-channel FSK/OOK RF transmitters are designed for use in applications requiring FCC or ETSI conformance for unlicensed use in the 315 MHz, 433 MHz, 868 MHz and 915 MHz bands.

The Si4020/21 EZRadio RF transmitters are highly integrated, flexible, cost-effective solutions that do not require production alignments. Used in conjunction with the Si4320 RF receiver, the Si4020/21 RF transmitters allow the developer to build robust, low-cost RF data links. They are ideal for high-volume wireless applications including remote control systems, home security and alarm systems, wireless keyboard/mouse and other PC peripherals, toys and automotive applications including remote keyless entry and tire pressure monitoring and alert systems. Industrial applications such as telemetry, personal/patient data logging, barcode readers and automatic meter reading are also supported.

 

Features

  • Fully integrated (low BOM, easy design-in)
  • Automatic antenna tuning
  • Fast frequency-hopping capability
  • Fast-settling, programmable, high-resolution PLL synthesizer
  • No alignment required in production
  • Stable and accurate
  • FSK modulation with programmable deviation
  • SPI bus for applications with microcontroller
  • Clock output for microcontroller
  • Integrated programmable crystal load capacitor 
  • Power-saving sleep mode
  • Sensitivity: –118 dBm
  • Low power consumption
  • Data rate: 0.2 to 128 kbps
  • FSK, GFSK and OOK modulation schemes
  • Power supply: 1.8 to 3.6 V
  • Ultra-low-power shutdown mode
     

 

Applications

  • Remote meter reading
  • Remote control
  • Remote keyless entry
  • Home security and alarm
  • Home automation
  • Industrial control
  • Sensor networks

 

Technologies

  • High bit rate (up to 256 kbps)
  • Direct loop antenna drive
  • Programmable output power level
  • Alternative OOK support
  • EEPROM mode supported
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Documentation    Expand All   Collapse All

 
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Data Sheet (2)

Document NameDescriptionVersionLast Updated
Si4020.pdf
Si4020 Data Sheet1.910/2/2008
Si4021.pdf
Si4021 Data Sheet2.310/2/2008

User Guides (1)

Document NameDescriptionVersionLast Updated
WDS_Chip_Config_UG.pdf
WDS Chip Configurator User Guide0.24/9/2010

Application Notes (2)

Document NameDescriptionVersionLast Updated
an421.pdf
AN421: Antenna Selection Guide for the Si4020 and Si4320 ISM Band FSK Transmitter/Receiver Chipset1.56/25/2009
an422.pdf
AN422: Antenna Development Guide for the Si4020, Si4320, and Si4420 ISM Band FSK EZRadio Chipsets1.517/15/2009

White Papers (1)

Document NameDescriptionVersionLast Updated
Key-Priorities-for-Sub-GHz-Wireless-Deployments.pdf
The benefits and trends of sub-GHz wireless IC systems among various industry applications
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Si4010 Development Kits

 

Design Tools    Expand All   Collapse All

 
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Software (9)

Document NameDescriptionVersionUpdated
Battery Life Calculator.zip
Battery Life Calculator
Chip Configurator Scripts.zip
Chip Configurator Scripts
Chip Configurator.zip
Chip Configurator v2.4 (unsupported version)2.4
WDS3-Setup.exe
Chip Configurator v3.1.4.03.1.4.0 (7 Dec 2011)12/7/2011
EZLinkChat.zip
EZLinkChat
LoadBoard_2.x_driver.zip
Loadboard (MSC-DKLB2.x) USB Driver2.x
dotnetfx.zip
Microsoft®.NET
RF Range Calculator v8.3.zip
RF Range Calculator v8.38.311/30/2011
WDS Terminal Emulator.zip
WDS Terminal Emulator

Schematics/Layout (7)

Document NameDescriptionVersionUpdated
4021-DKDB3.zip
4021 Schematics/Layout (868 BIFA)5.1
402x-DKDB11.zip
402x Schematics/Layout (434 Loop)5.2
402x-DKDB1314.zip
402x Schematics/Layout (50Ohm)5.4
402x-DKDB3.zip
402x Schematics/Layout (868 BIFA)5.1
402x-DKDB2.zip
402x Schematics/Layout (915 BIFA)5.2
402x-DKDB10.zip
402x Schematics/Layout (HB Loop)5.0
402x-DKDB7.zip
402x Schematics/Layout (xLoop)5.2

Training (1)

Document NameDescriptionVersionUpdated
WDS-1-Radio-Control-Panel.swf
Wireless Development Suite — Radio Control Panel Wireless Development Suite — Radio Control Panel
 

 

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Product Matrix


Part Number Available DocumentsOutput Power 868 MHzOutput Power 434 MHzSupply VoltageSensitivityPackageFSKDescriptionOOKFrequency Bands
Si4020Sample
Buy
Data Sheet
1 dBm3 dBm2.2 - 5.4 VTSSOP16256 kbpsTX256 kbps315, 434, 868, 915 MHz
Si4021Sample
Buy
Data Sheet
6 dBm8 dBm2.2 - 5.4 V-TSSOP16115 kbpsTX512 kbps434, 868, 915 MHz

 

​Note​: Supported for existing production, but not recommended for new designs. The Si4010 and Si4313 devices are recommended for new designs.

EZRadio Recommended Parts
​​
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Training & Resources

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