SI8645BA-AS1R

Digital Isolators Overview

The SI8645BA-AS1R is an automotive-grade digital isolator from the Si864x series, manufactured by Skyworks Solutions Inc. It features four unidirectional channels with a data rate of 150 Mb/s and operates within a supply voltage range of 2.5 V to 5.5 V. The device provides 1000 Vrms isolation via capacitive coupling and achieves a propagation delay of 8 ns. It is housed in a 16-SOIC package and supports an operating temperature range of -40°C to +125°C. Certified under AEC-Q100 standards, it draws 6.1 mA of supply current.

Digital Isolators Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for reliability
• Ultra-low power consumption suitable for energy-efficient designs
• High common-mode transient immunity ensuring signal integrity

Digital Isolators Applications

• Automotive battery management systems
• Inverter control circuits
• Motor drive interfaces

Digital Isolators Procurement Notes

Verify the specific suffix AS1R indicates reel packaging rather than tube. Confirm that the BA variant meets the required automotive grade specifications. Ensure the 16-SOIC footprint matches the target PCB layout. Check for RoHS compliance status prior to final procurement approval.

Digital Isolators Selection Notes

Select this component when four isolated channels are required for bidirectional or unidirectional signal transmission in automotive environments. Consider the 150 Mb/s speed limit for high-frequency applications. Evaluate the 1000 Vrms isolation barrier against system voltage requirements. Compare power consumption against other isolators if thermal management is critical.

Digital Isolators Part Context

This part belongs to the Si864x family of digital isolators, which utilizes Skyworks' proprietary silicon isolation technology. The family offers various channel counts and isolation voltages. The SI8645BA specifically targets automotive applications requiring robust performance and low power dissipation across wide temperature ranges.

Digital Isolators Replacement Considerations

SI8645BA-B-IU serves as a pin-compatible alternative in SSOP packaging. SI8645BB-AS1R provides higher 2500 Vrms isolation capability. Verify channel count and isolation voltage compatibility before substitution.