SI8642BB-AS1R

Digital Isolators Overview

The SI8642BB-AS1R is a general-purpose digital isolator from the Si864x series, manufactured by Skyworks Solutions Inc. It features four unidirectional channels with capacitive coupling technology. The device supports data rates up to 150 Mb/s and offers an insulation voltage of 2500 Vrms. It 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/fall times of 4 ns, and a common-mode transient immunity (CMTI) of 35 kV/µs. The component is housed in a 16-SOIC package and is rated for operation between -40°C and +125°C.

Digital Isolators Feature Summary

• Provides galvanic isolation via capacitive coupling technology for signal transmission across isolated domains.
• Features four independent unidirectional channels for versatile digital signal routing.
• Ensures high noise immunity with specified common-mode transient immunity ratings.

Digital Isolators Applications

• General-purpose digital isolation in industrial automation systems
• Isolation interfaces for power monitoring and metering equipment
• Communication bus isolation in automotive electronic control units

Digital Isolators Procurement Notes

Verify the specific suffix AS1R indicates tape-and-reel packaging when sourcing components. Confirm that the 2500 Vrms insulation rating aligns with system safety requirements. Ensure the 16-SOIC footprint matches the printed circuit board layout. Check for RoHS compliance status if environmental regulations apply to the final assembly.

Digital Isolators Selection Notes

Select this component for applications requiring moderate speed isolation with low power consumption. The 150 Mb/s data rate suits standard communication protocols. Consider the 2500 Vrms isolation barrier for basic safety separation needs. The wide operating temperature range supports harsh environment deployments without additional thermal management.

Digital Isolators Part Context

This part belongs to the Si864x family of digital isolators, which utilizes Skyworks' proprietary capacitive isolation technology. The family provides alternatives with varying channel counts and isolation voltages. The SI8642 variant specifically addresses four-channel unidirectional isolation needs within the broader portfolio.

Digital Isolators Replacement Considerations

Direct substitutes include SI8642BB-B-IS1R and SI8642BB-B-IU. Verify pin compatibility and insulation voltage ratings before substitution. Ensure the replacement part meets the same AEC-Q100 qualification if automotive reliability is required.