SI88642EC-AS

Overview

The SI88642EC-AS is a quad digital isolator from Skyworks Solutions, designed for automotive applications. It features four unidirectional channels with a data rate of 100 Mb/s per channel. The device provides an isolation voltage of 3750 Vrms using capacitive coupling technology. It includes an integrated DC-DC converter to generate isolated power supplies. The component operates within a supply voltage range of 3 V to 5.5 V and supports a maximum operating temperature of +125°C. It is housed in a 24-SOIC package.

Feature Summary

• Integrates a high-efficiency DC-DC converter for isolated power generation
• Supports unidirectional signal transmission across four independent channels
• Utilizes capacitive coupling technology for galvanic isolation
• Engineered specifically for automotive reliability and performance standards

Applications

• Automotive electronic control units (ECUs)
• Inverter gate drive circuits
• Isolated communication interfaces in vehicle networks
• Battery management systems requiring high isolation

Procurement Notes

Verify the specific suffix 'AS' confirms the automotive grade qualification and integrated DC-DC converter configuration. Ensure the 24-SOIC package dimensions match the PCB footprint requirements. Confirm that the 3750 Vrms isolation rating meets the safety standards of the target application environment. Cross-reference the manufacturer part number against official Skyworks documentation to avoid counterfeit components.

Selection Notes

Select this component when automotive-grade reliability and integrated power isolation are required. The 100 Mb/s data rate suits standard automotive bus speeds. Consider the 24-SOIC package size for board space constraints. Verify that the 3 V to 5.5 V supply range aligns with the system's voltage rails. Ensure the unidirectional channel configuration matches the signal flow direction of the design.

Part Context

The SI88642EC-AS belongs to the Si8864x family of digital isolators. This series is characterized by its integration of DC-DC converters, eliminating the need for external isolated power sources. The 'EC' designation typically indicates the automotive grade variant, while 'AS' specifies the tape and reel packaging option. It complements other Skyworks isolation products by offering a compact solution for high-voltage separation in noisy environments.

Replacement Considerations

Check for SI88642EC-IS as a potential alternative if industrial grade isolation is acceptable. Verify pin compatibility and electrical specifications before substitution. Ensure the replacement part maintains the same integrated DC-DC converter functionality and package outline.