SI88643EC-ASR

Overview

The SI88643EC-ASR is a unidirectional digital isolator from Skyworks Solutions, housed in a 24-SOIC package. It features four forward channels and three reverse channels, supporting data rates up to 100 Mb/s with a propagation delay of 18 ns. The device operates on a supply voltage between 3 V and 5.5 V and provides an insulation voltage of 3750 Vrms using capacitive coupling technology. It includes a built-in DC-DC converter and meets AEC-Q100 automotive qualification standards. The component functions within a temperature range of -40°C to +125°C.

Feature Summary

• Integrates a high-voltage DC-DC converter for isolated power generation
• Utilizes capacitive coupling technology for signal isolation
• Meets AEC-Q100 automotive reliability standards

Applications

• Automotive electronic control units
• Industrial communication interfaces
• Power conversion systems

Procurement Notes

Verify the specific suffix 'ASR' against the manufacturer's official documentation to confirm the reel packaging configuration and moisture sensitivity level. Ensure that the AEC-Q100 qualification status aligns with your project's automotive requirements. Cross-reference the SOIC-24 footprint dimensions with your PCB design guidelines before finalizing procurement orders.

Selection Notes

Select this component when unidirectional signal transmission across multiple channels is required alongside integrated isolated power delivery. The 3750 Vrms isolation rating suits applications demanding robust noise immunity. Consider the 100 Mb/s data rate limit and 18 ns propagation delay for timing-sensitive designs. Verify compatibility with the 3 V to 5.5 V supply range during system architecture planning.

Part Context

This part belongs to the Si8864x family of digital isolators, which are designed for high-speed data transmission across isolation barriers. The series typically combines signal isolation with power management capabilities. The SI88643EC-ASR variant specifically addresses multi-channel bidirectional data flow needs while maintaining a compact surface-mount form factor suitable for dense circuit board layouts.

Replacement Considerations

SI88643BC-ASR offers similar functionality but may differ in insulation voltage ratings or thermal performance characteristics. SI88642EC-ASR provides a different channel configuration with shutdown capabilities. Verify pinout compatibility and electrical specifications before substituting these alternatives.