SI8661BD-AS

Digital Isolators Overview

The SI8661BD-AS is an automotive-grade, six-channel digital isolator from the Si866x family by Skyworks Solutions. It utilizes capacitive coupling technology to provide electrical isolation with a rated insulation voltage of 5000 Vrms. The device supports a data rate of 150 Mb/s and operates within a supply voltage range of 2.375 V to 5.5 V. Key electrical parameters include a propagation delay of 8 ns, rise and fall times of 4 ns, and a typical operating supply current of 23 mA. It features five forward channels and one reverse channel, all unidirectional. The component is qualified under AEC-Q100 standards for automotive applications and functions reliably across an extended temperature range from -40°C to +125°C.

Digital Isolators Feature Summary

• Provides high-voltage galvanic isolation using robust capacitive coupling technology suitable for demanding environments.
• Certified for automotive reliability through AEC-Q100 qualification, ensuring performance in vehicle systems.
• Delivers high-speed signal transmission with a 150 Mb/s data rate and low propagation delay for precise timing.
• Operates on a wide single-supply voltage range, facilitating integration into various power architectures.

Digital Isolators Applications

• Automotive electronic control units requiring isolated communication interfaces
• Industrial motor drives and inverters needing high-voltage protection
• Power conversion systems such as solar inverters and battery management systems

Digital Isolators Procurement Notes

Verify that the specific part number matches the required insulation voltage and channel configuration. Confirm AEC-Q100 certification status if automotive compliance is mandatory. Check moisture sensitivity levels and reflow soldering profiles against assembly requirements. Ensure the SOIC-16 package dimensions align with PCB layout constraints. Validate supply voltage ranges against the target system's power rails.

Digital Isolators Selection Notes

Select this component when high isolation voltage and automotive reliability are critical. Compare operating current and propagation delay against other isolators if power efficiency or speed is constrained. Consider the unidirectional nature of the channels for circuit design. Evaluate the SOIC-16 footprint against available board space. Verify thermal dissipation capabilities given the operating current and ambient temperature conditions.

Digital Isolators Part Context

This device belongs to the Si866x series of ultra-low-power digital isolators. It shares architectural similarities with other members like the SI8660 and SI8663 but differs in channel count and directionality. The series is characterized by CMOS construction and capacitive isolation, offering a modern alternative to magnetic isolation technologies in interface applications.

Digital Isolators Replacement Considerations

Check SI8661BD-B-IS2 for identical specifications in a wide SOIC package. Review SI8661BC-AS for similar performance with different insulation ratings. Consult SI8663BD-AS if bidirectional or different channel configurations are needed. Verify pinout compatibility before substituting any variant.