SI8642EC-AS1R

Digital Isolators Overview

The SI8642EC-AS1R is a Skyworks Solutions automotive-grade digital isolator featuring four unidirectional channels in a 16-pin SOIC package. It supports data rates up to 150 Mbps with a propagation delay of 8 ns and rise/fall times of 4 ns. The device offers 3750 Vrms isolation voltage, operates on a supply voltage range of 2.375 V to 5.5 V, and includes a shutdown function. It withstands common-mode transients of 35 kV/µs, functions within -40°C to +125°C, and consumes 11 mA of operating current.

Digital Isolators Feature Summary

• Provides high-speed signal transmission with 150 Mbps data rate capability
• Ensures electrical safety through robust capacitive coupling isolation
• Includes a dedicated shutdown pin for power management control
• Engineered for automotive reliability under AEC-Q100 standards

Digital Isolators Applications

• Automotive infotainment systems requiring galvanic isolation
• On-board charging (OBC) interfaces
• Battery management system (BMS) communication links
• Advanced driver assistance systems (ADAS) sensor isolation

Digital Isolators Procurement Notes

Verify the specific suffix AS1R indicates reel packaging configuration. Confirm the EC designation aligns with the required 3750 Vrms isolation rating rather than higher or lower variants. Ensure the manufacturer is Skyworks Solutions Inc. and not a third-party distributor claiming original status without documentation. Check for RoHS compliance markers if environmental regulations apply to your assembly process.

Digital Isolators Selection Notes

Select this component when bidirectional isolation is unnecessary and unidirectional flow suffices. The 150 Mbps speed suits CAN FD, LIN, and Ethernet PHY connections. The 16-pin SOIC footprint aids PCB layout density. Consider the 11 mA quiescent current against thermal constraints. Verify that the 3750 Vrms rating meets the creepage and clearance requirements of your specific circuit topology.

Digital Isolators Part Context

This part belongs to the Si864x family of automotive digital isolators. It utilizes Skyworks' proprietary capacitive coupling technology to transmit signals across isolation barriers. The family is designed to replace traditional magnetic isolators, offering smaller form factors and lower power consumption while maintaining high reliability for harsh automotive environments.

Digital Isolators Replacement Considerations

Direct substitutes include other Si864x variants such as SI8642ED-AS2 or SI8642BA-B-IU, depending on whether higher isolation voltages or different packages are acceptable. Cross-referencing requires matching the 4-channel unidirectional configuration and 150 Mbps speed. Verify pin compatibility before swapping to ensure no redesign is needed.

Digital Isolators FAQ

Does the SI8642EC-AS1R support bidirectional signal transmission?

No, this specific model provides four unidirectional channels only.

What is the maximum common-mode transient immunity rating?

The device is rated for 35 kV/µs common-mode transient immunity.

Is a shutdown feature available on this isolator?

Yes, the SI8642EC-AS1R includes a shutdown pin to disable outputs and reduce power consumption.