​Si84xx Digital Isolators

Note: the Si84xx devices remain in production, but are not recommended for new designs. For new designs, please use the Si86xx Digital Isolators instead.
Silicon Labs' Si84xx digital isolator family is the industry’s highest-performance, easiest-to-use and lowest-cost line of 2,500 to 5,000 kVrms rated digital isolators. These digital isolators are 10x more reliable than optocouplers.
 
 

Features

  • 5 kV, 2.5 kV and 1 kV isolation ratings
  • High integration: up to 6 isolation channels in a single package
  • High-speed operation: DC–150 Mbps
  • Wide operating supply voltage: 2.7 - 5.5 V
  • Low power consumption
  • Precise timing
  • Less than 10 ns propagation delay
  • 2 ns pulse width distortion
  • 1 ns channel-channel matching
  • 2 ns pulse width skew
  • Transient immunity: >25 kV/µs
  • Enable controlled outputs
  • DC correct
  • No start-up initialization required
 
 

Applications

Quality Documents

 
 

Documentation

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Data Sheet (8)

User Guides (3)

DescriptionVersionUpdatedSize
Discrete ISOvolt Isolated DC-DC Converter Reference Design User's Guide
0.29/22/2011401 kB
Si84xxCOM-EVB User Guide
0.16/17/2010602 kB
Si84xxISO-EVB User Guide
0.38/23/2010431 kB

Application Notes (10)

White Papers (10)

PCN (5)

 

Development Kits

Si84xx Digital Isolator Kit​

The Si84xx Digital Isolator Kit provides a convenient engineering breakout board for simplifying evaluations of the Si84xx isolation product family with three different isolators (2, 4 and 6-channel) as well as a bidirectional I2C compliant isolator.

Si84xx Digital Isolated Communications Reference Design​

The Si84xx Digital Isolated Communications Reference Design showcases isolated RS-232, RS-485, and CAN interfaces alongside our 2.5 kV and 5.0 kV digital isolators.

ISOvolt Isolated Reference Design

The ISOvolt Reference Design provides the necessary isolated power supply for the secondary side of the isolation interface with a ​plug and play solution for up-to 3W of isolated continuous output power with 78% efficiency, fold-back current limiting, thermal protection and flexibility to allow for 3 V or 5 V inputs and outputs.
 
 

Design Tools

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Schematics/Layout (83)

DescriptionVersionUpdatedSize
ADI Ultra-Librarian Reader for CAD/CAE Schematic Footprints and Symbols .bxl Files
59592 kB
ADI Ultra-Librarian Reader for CAD/CAE Schematic Footprints and Symbols .bxl Files
59592 kB
Si8400AA-A-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/201221 kB
Si8400AB-A-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/201221 kB
Si8401AA-B-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/201221 kB
Si8401AB-B-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/201221 kB
Si8405AA-A-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/201225 kB
Si8405AB-A-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/201225 kB
Si8410AB-D-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/201221 kB
Si8410BB-D-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/201221 kB
Si8420AB-D-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/201221 kB
Si8420BB-D-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/201221 kB
Si8421AB-D-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/201221 kB
Si8421BB-D-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/201221 kB
Si8422AB-B-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/201221 kB
Si8422AD-B-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/201226 kB
Si8422BB-B-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/201221 kB
Si8422BD-B-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/201226 kB
Si8423AB-B-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/201221 kB
Si8423BB-B-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/201221 kB
Si8423BD-B-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/201226 kB
Si8430AB-D-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/201226 kB
Si8430AB-D-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/201225 kB
Si8430BB-D-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/201226 kB
Si8430BB-D-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/201225 kB
Si8431AB-D-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/201226 kB
Si8431AB-D-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/201225 kB
Si8431BB-D-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/201226 kB
Si8431BB-D-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/201225 kB
Si8435BB-D-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/201226 kB
Si8435BB-D-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/201225 kB
Si8440AA-D-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/201225 kB
Si8440AB-D-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/201226 kB
Si8440AB-D-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/201225 kB
Si8440BA-D-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/201225 kB
Si8440BB-D-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/201226 kB
Si8440BB-D-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/201225 kB
Si8441AA-D-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/201225 kB
Si8441AB-D-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/201226 kB
Si8441AB-D-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/201225 kB
Si8441BA-D-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/201225 kB
Si8441BB-D-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/201226 kB
Si8441BB-D-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/201225 kB
Si8442AA-D-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/201225 kB
Si8442AB-D-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/201226 kB
Si8442BA-D-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/201225 kB
Si8442BA-D-IU CAD/CAE Schematic Footprints and Symbols
1.06/26/201224 kB
Si8442BB-D-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/201226 kB
Si8442BB-D-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/201225 kB
Si8445BA-D-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/201225 kB
Si8445BB-D-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/201226 kB
Si8445BB-D-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/201225 kB
Si8450AA-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/201225 kB
Si8450AB-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/201225 kB
Si8450BA-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/201225 kB
Si8450BB-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/201225 kB
Si8451AA-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/201225 kB
Si8451AB-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/201225 kB
Si8451BA-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/201225 kB
Si8451BB-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/201225 kB
Si8452AA-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/201225 kB
Si8452AB-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/201225 kB
Si8452BA-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/201225 kB
Si8452BB-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/201225 kB
Si8455BA-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/201225 kB
Si8455BA-B-IU CAD/CAE Schematic Footprints and Symbols
1.06/26/201224 kB
Si8455BB-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/201225 kB
Si8460AA-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/201225 kB
Si8460AB-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/201225 kB
Si8460BA-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/201225 kB
Si8460BB-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/201225 kB
Si8461AA-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/201225 kB
Si8461AB-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/201225 kB
Si8461BA-B-IS1
1.06/26/201225 kB
Si8461BB-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/201225 kB
Si8462AA-B-IS1
1.06/26/201225 kB
Si8462AB-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/201225 kB
Si8462BA-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/201225 kB
Si8462BB-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/201225 kB
Si8463AA-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/201225 kB
Si8463AB-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/201225 kB
Si8463BA-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/201225 kB
Si8463BB-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/201225 kB

Models (1)

DescriptionVersionUpdatedSize
Si84xx IBIS Models V4.0
0.58/6/2010819 kB
Product Matrix
Zoom
Part NumberMaximum Propagation DelayIsolation Rating10kV surgeEnable ControlPackage TypeOutput SupplyInput SupplyTemperature RangeVDDBidirectional ChannelsEval KitUnidirectional ChannelsChannel TypeForward ChannelsReverse ChannelsMax Data RateDefault Output StateIntegrated Pull-UpAEC-Q100Input Type
Si8400AA-A-IS401.0NoNoNB SOIC82.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 V2Isolator EVB
Bidirectional1.7LowNoNoDigital
Si8400AB-A-IS402.5NoNoNB SOIC82.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 V2Isolator EVB
Bidirectional1.7LowNoNoDigital
Si8401AA-B-IS401.0NoNoNB SOIC82.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 V2Isolator EVB
Unidirectional+Bidirectional1.7LowNoNoDigital
Si8401AB-B-IS402.5NoNoNB SOIC82.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 V2Isolator EVB
Unidirectional+Bidirectional1.7LowNoNoDigital
Si8405AA-A-IS1401.0NoNoNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 V2Isolator EVB
2Unidirectional+Bidirectional111.7LowNoNoDigital
Si8405AB-A-IS1402.5NoNoNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 V2Isolator EVB
2Unidirectional+Bidirectional111.7LowNoNoDigital
Si8410AB-D-IS352.5NoNoNB SOIC82.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
1Unidirectional101LowNoNoDigital
Si8410AD-A-IS355.0NoNoWB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
2Unidirectional101LowNoNoDigital
Si8410BB-D-IS9.52.5NoNoNB SOIC82.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
1Unidirectional10150LowNoNoDigital
Si8410BD-A-IS9.55.0NoNoWB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
1Unidirectional10150LowNoNoDigital
Si8420AB-D-IS352.5NoNoNB SOIC82.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
2Unidirectional201LowNoNoDigital
Si8420AD-A-IS355.0NoNoWB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
2Unidirectional201LowNoNoDigital
Si8420BB-D-IS9.52.5NoNoNB SOIC82.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
2Unidirectional20150LowNoNoDigital
Si8420BD-A-IS9.55.0NoNoWB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
2Unidirectional20150LowNoNoDigital
Si8421AB-D-IS352.5NoNoNB SOIC82.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
2Unidirectional111LowNoNoDigital
Si8421AD-B-IS355.0NoNoWB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
2Unidirectional111LowNoNoDigital
Si8421BB-D-IS9.52.5NoNoNB SOIC82.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
2Unidirectional11150LowNoNoDigital
Si8421BD-B-IS9.55.0NoNoWB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
2Unidirectional11150LowNoNoDigital
Si8422AB-B-IS352.5NoNoNB SOIC82.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
2Unidirectional111LowNoNoDigital
Si8422AD-B-IS355.0NoNoWB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
2Unidirectional111LowNoNoDigital
Si8422BB-B-IS9.52.5NoNoNB SOIC82.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
2Unidirectional11150LowNoNoDigital
Si8422BD-B-IS9.55.0NoNoWB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
2Unidirectional11150LowNoNoDigital
Si8423AB-B-IS352.5NoNoNB SOIC82.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
2Unidirectional201LowNoNoDigital
Si8423AD-B-IS355.0NoNoWB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
2Unidirectional201LowNoNoDigital
Si8423BB-B-IS9.52.5NoNoNB SOIC82.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
2Unidirectional20150LowNoNoDigital
Si8423BD-B-IS9.55.0NoNoWB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
2Unidirectional20150LowNoNoDigital
Si8430AB-D-IS352.5NoYesWB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
3Unidirectional301LowNoNoDigital
Si8430AB-D-IS1352.5NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
3Unidirectional301LowNoNoDigital
Si8430BB-D-IS9.52.5NoYesWB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
3Unidirectional30150LowNoNoDigital
Si8430BB-D-IS19.52.5NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
3Unidirectional30150LowNoNoDigital
Si8431AB-D-IS352.5NoYesWB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
3Unidirectional211LowNoNoDigital
Si8431AB-D-IS1352.5NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
3Unidirectional211LowNoNoDigital
Si8431BB-D-IS9.52.5NoYesWB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
3Unidirectional21150LowNoNoDigital
Si8431BB-D-IS19.52.5NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
3Unidirectional21150LowNoNoDigital
Si8435BB-D-IS9.52.5NoNoWB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
3Unidirectional30150LowNoNoDigital
Si8435BB-D-IS19.52.5NoNoNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
3Unidirectional30150LowNoNoDigital
Si8440AA-D-IS1351.0NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
4Unidirectional401LowNoNoDigital
Si8440AB-D-IS352.5NoYesWB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
4Unidirectional401LowNoNoDigital
Si8440AB-D-IS1352.5NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
4Unidirectional401LowNoNoDigital
Si8440BA-D-IS19.51.0NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
4Unidirectional40150LowNoNoDigital
Si8440BB-D-IS9.52.5NoYesWB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
4Unidirectional40150LowNoNoDigital
Si8440BB-D-IS19.52.5NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
4Unidirectional40150LowNoNoDigital
Si8441AA-D-IS1351.0NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
4Unidirectional311LowNoNoDigital
Si8441AB-D-IS352.5NoYesWB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
4Unidirectional311LowNoNoDigital
Si8441AB-D-IS1352.5NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
4Unidirectional311LowNoNoDigital
Si8441BA-D-IS19.51.0NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
4Unidirectional31150LowNoNoDigital
Si8441BB-D-IS9.52.5NoYesWB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
4Unidirectional31150LowNoNoDigital
Si8441BB-D-IS19.52.5NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
4Unidirectional31150LowNoNoDigital
Si8442AA-D-IS1351.0NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
4Unidirectional221LowNoNoDigital
Si8442AB-D-IS352.5NoYesWB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
4Unidirectional221LowNoNoDigital
Si8442AB-D-IS1352.5NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
4Unidirectional221LowNoNoDigital
Si8442BA-D-IS19.51.0NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
4Unidirectional22150LowNoNoDigital
Si8442BA-D-IU9.51.0NoYesQSOP162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
4Unidirectional22150LowNoNoDigital
Si8442BB-D-IS9.52.5NoYesWB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
4Unidirectional22150LowNoNoDigital
Si8442BB-D-IS19.52.5NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
4Unidirectional22150LowNoNoDigital
Si8445BA-D-IS19.51.0NoNoNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
4Unidirectional40150LowNoNoDigital
Si8445BB-D-IS9.52.5NoNoWB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
4Unidirectional40150LowNoNoDigital
Si8445BB-D-IS19.52.5NoNoNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
4Unidirectional40150LowNoNoDigital
Si8450AA-B-IS1351.0NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
5Unidirectional501LowNoNoDigital
Si8450AB-B-IS1352.5NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
5Unidirectional501LowNoNoDigital
Si8450BA-B-IS19.51.0NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
5Unidirectional50150LowNoNoDigital
Si8450BB-B-IS19.52.5NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
5Unidirectional50150LowNoNoDigital
Si8451AA-B-IS1351.0NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
5Unidirectional411LowNoNoDigital
Si8451AB-B-IS1352.5NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
5Unidirectional411LowNoNoDigital
Si8451BA-B-IS19.51.0NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
5Unidirectional41150LowNoNoDigital
Si8451BB-B-IS19.52.5NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
5Unidirectional41150LowNoNoDigital
Si8452AA-B-IS1351.0NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
5Unidirectional321LowNoNoDigital
Si8452AB-B-IS1352.5NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
5Unidirectional321LowNoNoDigital
Si8452BA-B-IS19.51.0NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
5Unidirectional32150LowNoNoDigital
Si8452BB-B-IS19.52.5NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
5Unidirectional32150LowNoNoDigital
Si8455BA-B-IS19.51.0NoNoNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
5Unidirectional50150LowNoNoDigital
Si8455BA-B-IU9.51.0NoNoQSOP162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
5Unidirectional50150LowNoNoDigital
Si8455BB-B-IS19.52.5NoNoNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
5Unidirectional50150LowNoNoDigital
Si8460AA-B-IS1351.0NoNoNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
6Unidirectional601LowNoNoDigital
Si8460AB-B-IS1352.5NoNoNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
6Unidirectional601LowNoNoDigital
Si8460BA-B-IS19.51.0NoNoNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
6Unidirectional60150LowNoNoDigital
Si8460BB-B-IS19.52.5NoNoNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
6Unidirectional60150LowNoNoDigital
Si8461AA-B-IS1351.0NoNoNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
6Unidirectional511LowNoNoDigital
Si8461AB-B-IS1352.5NoNoNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
6Unidirectional511LowNoNoDigital
Si8461BA-B-IS19.51.0NoNoNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
6Unidirectional51150LowNoNoDigital
Si8461BB-B-IS19.52.5NoNoNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
6Unidirectional51150LowNoNoDigital
Si8462AA-B-IS1351.0NoNoNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
6Unidirectional421LowNoNoDigital
Si8462AB-B-IS1352.5NoNoNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
6Unidirectional421LowNoNoDigital
Si8462BA-B-IS19.51.0NoNoNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
6Unidirectional42150LowNoNoDigital
Si8462BB-B-IS19.52.5NoNoNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
6Unidirectional42150LowNoNoDigital
Si8463AA-B-IS1351.0NoNoNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
6Unidirectional331LowNoNoDigital
Si8463AB-B-IS1352.5NoNoNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
6Unidirectional331LowNoNoDigital
Si8463BA-B-IS19.51.0NoNoNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
6Unidirectional33150LowNoNoDigital
Si8463BB-B-IS19.52.5NoNoNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2.7 - 5.5 VIsolator EVB
6Unidirectional33150LowNoNoDigital
Figure 1: Si84xx Isolator OperationThe Si84xx isolator family is targeted toward moderate noise environment applications where cost, integration, reliability and stability over operating temperature are important factors. This family offers certified isolation ratings of 2.5 kVrms and 5.0 kVrms, and device configurations from one to six channels in forward and reverse data flow directions. Industry-leading transmission rates (150 kbps max), high reliability (TDDB > 60 years) and stability over operating temperature from -40 to +125 ºC make the Si84xx favored over optocouplers and competing silicon isolator solutions.
Silicon Labs' digital isolator consists of two identical CMOS die that form a high frequency transmitter and receiver separated by a capacitive differential isolation barrier when connected together. A logic high on the isolator channel input transmits a carrier to the receiver, driving the channel output to logic high. Conversely, a logic low on the input inhibits the carrier, driving the channel output to logic low.
High noise application environments should use the Si86xx pin-compatible digital isolator series which is noise-hardened for more robust operation. Table 1 summarizes the key differences between the Si84xx, Si86xx and Si87xx digital isolator families, while Table 2 shows the available Si84xx and Si86xx configurations.

Table 1. Si84xx, Si86xx and Si87xx Top-Level Comparison

  Si84xx Si86xx Si87xx​
Max Isolation Voltage (kV) 2.5​ 5.0​ 5.0​
​Min CMTI (kV/µs) 25​ 35​ 35​
Input Device​ Buffer​ Schmitt Trigger​ Opto Emulator​
Input VDD Range (V)​ 2.7 to 5.5​ 2.5 to 5.5​ 1.7 to 2.8*​
Output VDD Range (V)​ 2.7 to 5.5​ 2.5 to 5.5​ 4.5 to 30​
Current/Ch at VDD = 5 V, 1 Mbps (mA)​ 1.65​ 1.25​ 2.5​
Max Prop Delay (nS)​ 9.5​ 9​ 60​
Max Pulse Width Distortion (nS)​ 2.5​ 1.5​ —​
Minimum Pulse Width (nS)​ 6​ 5​ —​
10 kV Surge Capability​ No​ No​ Yes​
Typ Rise/Fall Time at VDD = 5 V (nS)​ 5.0/3.7​ 3.5/2.0​ 12​
Output Latch​ None​ None​ None​
* Voltage shown is anode voltage with respect to cathode voltage​
 
 

Table 2. Si84xx and Si86xx Families

Si84xx and Si86xx Families  
 
 
The Si84xx products are CSA and UL certified. CSA_UL_Logos
 
The Si84xx products are VDE certified. VDE_Logo

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