UG130 Datasheet, PDF (5/14 Pages) Silicon Laboratories – Si86xxT-EVB Users Guide

UG130: Si86xxT-EVB User's Guide
Hardware Setup and Demonstration
3.2.2 Fail-safes
When power is removed from one side of the isolator, the outputs at the other side of the isolator default to logic High.
• A-side
• Remove all shunts.
• Remove A-side power supply.
• Measure B-side outputs, B1 and B2 and see that they are logic High.
• Replace A-side power and see B1 and B2 driven to their appropriate states.
• B-side
• Remove all shunts.
• Remove B-side power supply.
• Measure A-side outputs, A3 and A4 and see that they are logic High.
• Replace B-side power and see A3 and A4 drive to their appropriate states.
Figure 3.2. EVB — Failsafe, No VDDA
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