SI88642EC-IS

Overview

The SI88642EC-IS is a quad-channel digital isolator from Skyworks Solutions, featuring an integrated DC-DC converter for isolated power supply. It provides 3750 Vrms isolation voltage with capacitive coupling technology. The device supports unidirectional data transmission at speeds up to 100 Mb/s per channel. Operating on a single supply voltage between 3 V and 5.5 V, it exhibits a typical propagation delay of 18 ns and operates within a temperature range of -40°C to +125°C. Packaged in a 24-SOIC format.

Feature Summary

• Integrates a high-efficiency DC-DC converter to provide isolated power, eliminating the need for external isolated supplies.
• Utilizes silicon dioxide (SiO2) capacitive coupling technology for robust signal isolation and high reliability.
• Offers four independent unidirectional channels with optimized timing characteristics for precise data synchronization.

Applications

• Industrial automation systems requiring galvanic isolation
• Medical equipment with strict safety isolation standards
• Power electronics and motor control circuits

Procurement Notes

Verify the specific suffix 'IS' corresponds to the tube packaging configuration rather than the reel variant. Confirm that the 3750 Vrms isolation rating meets the system's safety requirements. Ensure the integrated DC-DC converter output specifications align with the load requirements of the isolated side circuitry before finalizing procurement.

Selection Notes

Select this component when a compact solution combining signal isolation and isolated power generation is required. The 24-SOIC package suits space-constrained designs. Consider the 100 Mb/s data rate capability for high-speed communication interfaces. Verify compatibility with the system's voltage levels and thermal management needs within the specified operating range.

Part Context

This part belongs to the Si886xx family of digital isolators, which are designed for high-performance applications. The EC designation indicates specific insulation and reliability characteristics. It complements other variants in the series that may differ in channel count or packaging style, providing a standardized interface solution across various industrial and commercial platforms.

Replacement Considerations

SI88642ED-IS is a related variant offering higher isolation voltage ratings. SI88642EC-ISR shares the same electrical characteristics but utilizes tape-and-reel packaging instead of tubes. Cross-reference pinouts and thermal dissipation requirements when substituting.