SI88621BC-AS

Overview

The SI88621BC-AS is a Skyworks Solutions digital isolator featuring two unidirectional channels and an integrated DC-DC converter. It operates within a 3 V to 5.5 V supply range and provides 5000 Vrms insulation voltage via capacitive coupling. The device supports data rates up to 100 Mb/s with a typical propagation delay of 18 ns and rise/fall times of 2.5 ns. It is housed in a 20-SOIC package, rated for automotive applications, and functions across a temperature range of -40°C to +125°C.

Feature Summary

• Integrates a high-efficiency DC-DC converter to provide isolated power supply capability
• Provides robust 5000 Vrms isolation barrier using capacitive coupling technology
• Designed specifically for automotive grade reliability and environmental stability

Applications

• Automotive gate driver circuits requiring isolated power
• Industrial motor control systems with high voltage isolation needs
• Inverter and converter topologies demanding compact footprint solutions

Procurement Notes

Verify the specific suffix 'AS' confirms the 5000 Vrms rating and automotive qualification distinct from other variants like 'ISR'. Confirm RoHS compliance status through official datasheets. Ensure packaging type matches project requirements as tube or reel options may vary by sub-model. Check humidity sensitivity handling procedures during assembly.

Selection Notes

Select this component when both signal isolation and isolated power generation are required in a single package. The 2-channel configuration suits bidirectional communication pairs where one side powers the other. Consider the SOIC-20 footprint for PCB layout constraints. Verify input/output logic levels match the system interface requirements before integration.

Part Context

This part belongs to the Si886xx family of digital isolators with integrated power supplies. It complements non-isolated power designs by combining isolation barriers with power conversion. The automotive-grade variant ensures durability in harsh electromagnetic environments typical of vehicle electronics and industrial machinery.

Replacement Considerations

Direct substitutes include SI88621BC-IS for tube packaging or SI88621BC-ISR for reel packaging, maintaining identical electrical characteristics. Cross-reference with SI88622BC series if higher 5000 Vrms isolation is needed without the DC-DC converter.