​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)

Application Notes (10)

White Papers (10)

PCN (6)

 

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
ADI Ultra-Librarian Reader for CAD/CAE Schematic Footprints and Symbols .bxl Files
Si8400AA-A-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8400AB-A-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8401AA-B-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8401AB-B-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8405AA-A-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8405AB-A-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8410AB-D-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8410BB-D-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8420AB-D-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8420BB-D-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8421AB-D-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8421BB-D-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8422AB-B-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8422AD-B-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8422BB-B-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8422BD-B-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8423AB-B-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8423BB-B-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8423BD-B-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8430AB-D-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8430AB-D-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8430BB-D-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8430BB-D-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8431AB-D-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8431AB-D-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8431BB-D-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8431BB-D-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8435BB-D-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8435BB-D-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8440AA-D-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8440AB-D-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8440AB-D-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8440BA-D-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8440BB-D-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8440BB-D-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8441AA-D-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8441AB-D-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8441AB-D-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8441BA-D-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8441BB-D-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8441BB-D-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8442AA-D-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8442AB-D-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8442BA-D-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8442BA-D-IU CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8442BB-D-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8442BB-D-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8445BA-D-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8445BB-D-IS CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8445BB-D-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8450AA-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8450AB-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8450BA-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8450BB-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8451AA-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8451AB-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8451BA-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8451BB-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8452AA-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8452AB-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8452BA-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8452BB-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8455BA-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8455BA-B-IU CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8455BB-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8460AA-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8460AB-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8460BA-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8460BB-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8461AA-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8461AB-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8461BA-B-IS1
1.06/26/2012
Si8461BB-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8462AA-B-IS1
1.06/26/2012
Si8462AB-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8462BA-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8462BB-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8463AA-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8463AB-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8463BA-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/2012
Si8463BB-B-IS1 CAD/CAE Schematic Footprints and Symbols
1.06/26/2012

Models (1)

DescriptionVersionUpdatedSize
Si84xx IBIS Models V4.0
0.58/6/2010
Product Matrix
Zoom
Part NumberDatasheetMaximum Propagation DelayIsolation Rating10kV surgeEnable ControlPackage TypeOutput SupplyInput SupplyTemperature RangeBidirectional ChannelsEval KitUnidirectional ChannelsChannel TypeForward ChannelsReverse ChannelsMax Data RateDefault Output StateIntegrated Pull-UpAEC-Q100Input TypeOutput Type
Si8400AA-A-IS
Buy
Sample

401.0NoNoNB SOIC82.7 - 5.52.7 - 5.5-40 to 125 °C2Isolator EVB
Bidirectional1.7LowNoNoDigital
Si8400AB-A-IS
Buy
Sample

402.5NoNoNB SOIC82.7 - 5.52.7 - 5.5-40 to 125 °C2Isolator EVB
Bidirectional1.7LowNoNoDigital
Si8401AA-B-IS
Buy
Sample

401.0NoNoNB SOIC82.7 - 5.52.7 - 5.5-40 to 125 °C2Isolator EVB
Unidirectional+Bidirectional1.7LowNoNoDigital
Si8401AB-B-IS
Buy
Sample

402.5NoNoNB SOIC82.7 - 5.52.7 - 5.5-40 to 125 °C2Isolator EVB
Unidirectional+Bidirectional1.7LowNoNoDigital
Si8405AA-A-IS1
Buy
Sample

401.0NoNoNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2Isolator EVB
2Unidirectional+Bidirectional111.7LowNoNoDigital
Si8405AB-A-IS1
Buy
Sample

402.5NoNoNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °C2Isolator EVB
2Unidirectional+Bidirectional111.7LowNoNoDigital
Si8410AB-D-IS
Buy
Sample

352.5NoNoNB SOIC82.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
1Unidirectional101LowNoNoDigital
Si8410AD-A-IS
Buy
Sample

355.0NoNoWB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
2Unidirectional101LowNoNoDigital
Si8410BB-D-IS
Buy
Sample

9.52.5NoNoNB SOIC82.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
1Unidirectional10150LowNoNoDigital
Si8410BD-A-IS
Buy
Sample

9.55.0NoNoWB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
1Unidirectional10150LowNoNoDigital
Si8420AB-D-IS
Buy
Sample

352.5NoNoNB SOIC82.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
2Unidirectional201LowNoNoDigital
Si8420AD-A-IS
Buy
Sample

355.0NoNoWB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
2Unidirectional201LowNoNoDigital
Si8420BB-D-IS
Buy
Sample

9.52.5NoNoNB SOIC82.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
2Unidirectional20150LowNoNoDigital
Si8420BD-A-IS
Buy
Sample

9.55.0NoNoWB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
2Unidirectional20150LowNoNoDigital
Si8421AB-D-IS
Buy
Sample

352.5NoNoNB SOIC82.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
2Unidirectional111LowNoNoDigital
Si8421AD-B-IS
Buy
Sample

355.0NoNoWB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
2Unidirectional111LowNoNoDigital
Si8421BB-D-IS
Buy
Sample

9.52.5NoNoNB SOIC82.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
2Unidirectional11150LowNoNoDigital
Si8421BD-B-IS
Buy
Sample

9.55.0NoNoWB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
2Unidirectional11150LowNoNoDigital
Si8422AB-B-IS
Buy
Sample

352.5NoNoNB SOIC82.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
2Unidirectional111LowNoNoDigital
Si8422AD-B-IS
Buy
Sample

355.0NoNoWB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
2Unidirectional111LowNoNoDigital
Si8422BB-B-IS
Buy
Sample

9.52.5NoNoNB SOIC82.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
2Unidirectional11150LowNoNoDigital
Si8422BD-B-IS
Buy
Sample

9.55.0NoNoWB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
2Unidirectional11150LowNoNoDigital
Si8423AB-B-IS
Buy
Sample

352.5NoNoNB SOIC82.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
2Unidirectional201LowNoNoDigital
Si8423AD-B-IS
Buy
Sample

355.0NoNoWB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
2Unidirectional201LowNoNoDigital
Si8423BB-B-IS
Buy
Sample

9.52.5NoNoNB SOIC82.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
2Unidirectional20150LowNoNoDigital
Si8423BD-B-IS
Buy
Sample

9.55.0NoNoWB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
2Unidirectional20150LowNoNoDigital
Si8430AB-D-IS
Buy
Sample

352.5NoYesWB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
3Unidirectional301LowNoNoDigital
Si8430AB-D-IS1
Buy
Sample

352.5NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
3Unidirectional301LowNoNoDigital
Si8430BB-D-IS
Buy
Sample

9.52.5NoYesWB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
3Unidirectional30150LowNoNoDigital
Si8430BB-D-IS1
Buy
Sample

9.52.5NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
3Unidirectional30150LowNoNoDigital
Si8431AB-D-IS
Buy
Sample

352.5NoYesWB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
3Unidirectional211LowNoNoDigital
Si8431AB-D-IS1
Buy
Sample

352.5NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
3Unidirectional211LowNoNoDigital
Si8431BB-D-IS
Buy
Sample

9.52.5NoYesWB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
3Unidirectional21150LowNoNoDigital
Si8431BB-D-IS1
Buy
Sample

9.52.5NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
3Unidirectional21150LowNoNoDigital
Si8435BB-D-IS
Buy
Sample

9.52.5NoNoWB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
3Unidirectional30150LowNoNoDigital
Si8435BB-D-IS1
Buy
Sample

9.52.5NoNoNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
3Unidirectional30150LowNoNoDigital
Si8440AA-D-IS1
Buy
Sample

351.0NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
4Unidirectional401LowNoNoDigital
Si8440AB-D-IS
Buy
Sample

352.5NoYesWB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
4Unidirectional401LowNoNoDigital
Si8440AB-D-IS1
Buy
Sample

352.5NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
4Unidirectional401LowNoNoDigital
Si8440BA-D-IS1
Buy
Sample

9.51.0NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
4Unidirectional40150LowNoNoDigital
Si8440BB-D-IS
Buy
Sample

9.52.5NoYesWB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
4Unidirectional40150LowNoNoDigital
Si8440BB-D-IS1
Buy
Sample

9.52.5NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
4Unidirectional40150LowNoNoDigital
Si8441AA-D-IS1
Buy
Sample

351.0NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
4Unidirectional311LowNoNoDigital
Si8441AB-D-IS
Buy
Sample

352.5NoYesWB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
4Unidirectional311LowNoNoDigital
Si8441AB-D-IS1
Buy
Sample

352.5NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
4Unidirectional311LowNoNoDigital
Si8441BA-D-IS1
Buy
Sample

9.51.0NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
4Unidirectional31150LowNoNoDigital
Si8441BB-D-IS
Buy
Sample

9.52.5NoYesWB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
4Unidirectional31150LowNoNoDigital
Si8441BB-D-IS1
Buy
Sample

9.52.5NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
4Unidirectional31150LowNoNoDigital
Si8442AA-D-IS1
Buy
Sample

351.0NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
4Unidirectional221LowNoNoDigital
Si8442AB-D-IS
Buy
Sample

352.5NoYesWB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
4Unidirectional221LowNoNoDigital
Si8442AB-D-IS1
Buy
Sample

352.5NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
4Unidirectional221LowNoNoDigital
Si8442BA-D-IS1
Buy
Sample

9.51.0NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
4Unidirectional22150LowNoNoDigital
Si8442BA-D-IU
Buy
Sample

9.51.0NoYesQSOP162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
4Unidirectional22150LowNoNoDigital
Si8442BB-D-IS
Buy
Sample

9.52.5NoYesWB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
4Unidirectional22150LowNoNoDigital
Si8442BB-D-IS1
Buy
Sample

9.52.5NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
4Unidirectional22150LowNoNoDigital
Si8445BA-D-IS1
Buy
Sample

9.51.0NoNoNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
4Unidirectional40150LowNoNoDigital
Si8445BB-D-IS
Buy
Sample

9.52.5NoNoWB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
4Unidirectional40150LowNoNoDigital
Si8445BB-D-IS1
Buy
Sample

9.52.5NoNoNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
4Unidirectional40150LowNoNoDigital
Si8450AA-B-IS1
Buy
Sample

351.0NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
5Unidirectional501LowNoNoDigital
Si8450AB-B-IS1
Buy
Sample

352.5NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
5Unidirectional501LowNoNoDigital
Si8450BA-B-IS1
Buy
Sample

9.51.0NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
5Unidirectional50150LowNoNoDigital
Si8450BB-B-IS1
Buy
Sample

9.52.5NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
5Unidirectional50150LowNoNoDigital
Si8451AA-B-IS1
Buy
Sample

351.0NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
5Unidirectional411LowNoNoDigital
Si8451AB-B-IS1
Buy
Sample

352.5NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
5Unidirectional411LowNoNoDigital
Si8451BA-B-IS1
Buy
Sample

9.51.0NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
5Unidirectional41150LowNoNoDigital
Si8451BB-B-IS1
Buy
Sample

9.52.5NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
5Unidirectional41150LowNoNoDigital
Si8452AA-B-IS1
Buy
Sample

351.0NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
5Unidirectional321LowNoNoDigital
Si8452AB-B-IS1
Buy
Sample

352.5NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
5Unidirectional321LowNoNoDigital
Si8452BA-B-IS1
Buy
Sample

9.51.0NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
5Unidirectional32150LowNoNoDigital
Si8452BB-B-IS1
Buy
Sample

9.52.5NoYesNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
5Unidirectional32150LowNoNoDigital
Si8455BA-B-IS1
Buy
Sample

9.51.0NoNoNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
5Unidirectional50150LowNoNoDigital
Si8455BA-B-IU
Buy
Sample

9.51.0NoNoQSOP162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
5Unidirectional50150LowNoNoDigital
Si8455BB-B-IS1
Buy
Sample

9.52.5NoNoNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
5Unidirectional50150LowNoNoDigital
Si8460AA-B-IS1
Buy
Sample

351.0NoNoNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
6Unidirectional601LowNoNoDigital
Si8460AB-B-IS1
Buy
Sample

352.5NoNoNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
6Unidirectional601LowNoNoDigital
Si8460BA-B-IS1
Buy
Sample

9.51.0NoNoNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
6Unidirectional60150LowNoNoDigital
Si8460BB-B-IS1
Buy
Sample

9.52.5NoNoNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
6Unidirectional60150LowNoNoDigital
Si8461AA-B-IS1
Buy
Sample

351.0NoNoNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
6Unidirectional511LowNoNoDigital
Si8461AB-B-IS1
Buy
Sample

352.5NoNoNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
6Unidirectional511LowNoNoDigital
Si8461BA-B-IS1
Buy
Sample

9.51.0NoNoNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
6Unidirectional51150LowNoNoDigital
Si8461BB-B-IS1
Buy
Sample

9.52.5NoNoNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
6Unidirectional51150LowNoNoDigital
Si8462AA-B-IS1
Buy
Sample

351.0NoNoNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
6Unidirectional421LowNoNoDigital
Si8462AB-B-IS1
Buy
Sample

352.5NoNoNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
6Unidirectional421LowNoNoDigital
Si8462BA-B-IS1
Buy
Sample

9.51.0NoNoNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
6Unidirectional42150LowNoNoDigital
Si8462BB-B-IS1
Buy
Sample

9.52.5NoNoNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
6Unidirectional42150LowNoNoDigital
Si8463AA-B-IS1
Buy
Sample

351.0NoNoNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
6Unidirectional331LowNoNoDigital
Si8463AB-B-IS1
Buy
Sample

352.5NoNoNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
6Unidirectional331LowNoNoDigital
Si8463BA-B-IS1
Buy
Sample

9.51.0NoNoNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator EVB
6Unidirectional33150LowNoNoDigital
Si8463BB-B-IS1
Buy
Sample

9.52.5NoNoNB SOIC162.7 - 5.52.7 - 5.5-40 to 125 °CIsolator 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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