SI88642EC-ASR

Overview

The SI88642EC-ASR is an automotive-grade digital isolator from Skyworks Solutions, featuring four unidirectional channels in a 24-SOIC package. It provides 3750 Vrms isolation via capacitive coupling and supports data rates up to 100 Mb/s with a common mode transient immunity of 40 kV/µs. The device operates on a single supply voltage between 3 V and 5.5 V, drawing 10.8 mA. Key timing parameters include a propagation delay of 18 ns and rise/fall times of 2.5 ns. It functions within a temperature range of -40°C to +125°C and includes a shutdown feature.

Feature Summary

• Automotive qualification for reliable operation in vehicle environments
• Integrated DC/DC converter for isolated power generation
• High common mode transient immunity for noise resilience

Applications

• Automotive infotainment systems
• Body control modules
• Gateway devices in vehicle networks

Procurement Notes

Verify the ASR suffix indicates automotive grade and reel packaging configuration. Confirm the specific insulation voltage rating matches system requirements. Check datasheet for moisture sensitivity level handling instructions. Ensure compatibility with 24-SOIC footprint during PCB layout. Validate operating temperature range against environmental conditions.

Selection Notes

Choose this component when automotive certification is mandatory. Select for applications requiring integrated isolated power supplies. Consider for high-noise environments needing robust transient immunity. Opt for unidirectional signal flow requirements. Verify channel count meets interface needs without excess pins.

Part Context

This part belongs to the Si88x2x/Si88x4x family of digital isolators. It utilizes Skyworks' proprietary capacitive coupling technology. The series offers various channel configurations and isolation ratings. The EC suffix typically denotes enhanced characteristics or specific packaging variants within the product line.

Replacement Considerations

SI88642ED-IS is a general-purpose variant with similar electrical specifications but lacks automotive qualification.