SI8645BB-AS1R

Digital Isolators Overview

The SI8645BB-AS1R is a unidirectional digital isolator from the Si864x series, manufactured by Skyworks Solutions Inc. It features four independent channels with capacitive coupling technology and an insulation voltage of 2500 Vrms. The device supports data rates up to 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/fall times of 4 ns, and a pulse width of 5 ns. It is qualified under AEC-Q100 standards for automotive applications and functions reliably across a temperature range of -40°C to +125°C.

Digital Isolators Feature Summary

• Automotive-grade qualification ensuring reliability in demanding environments
• High common-mode transient immunity for noise-resistant signal transmission
• Ultra-low power consumption optimized for energy-efficient systems

Digital Isolators Applications

• Automotive electronic control units (ECUs)
• Inverter gate drive isolation
• Industrial communication interfaces

Digital Isolators Procurement Notes

Verify the specific suffix AS1R corresponds to the tape-and-reel packaging format required for automated assembly processes. Confirm that the AEC-Q100 qualification status meets the specific reliability standards mandated by the target automotive application. Ensure compatibility with the SOIC-16 package dimensions during PCB layout design to prevent mechanical fit issues.

Digital Isolators Selection Notes

Select this component when high-speed data isolation is required alongside strict automotive reliability standards. The 150 Mb/s data rate supports modern industrial protocols, while the 2500 Vrms isolation rating provides adequate safety margins for many low-voltage automotive circuits. Consider the unidirectional nature of the channels when designing circuit topology.

Digital Isolators Part Context

This part belongs to the Si864x family of digital isolators, which utilizes Skyworks' proprietary capacitive isolation technology. The family offers various channel counts and isolation ratings, with the SI8645 variant specifically providing four forward channels. The BB suffix indicates the automotive grade version, distinguishing it from commercial variants.

Digital Isolators Replacement Considerations

SI8645BB-AS: Identical functional specifications but packaged in tubes instead of reels. Suitable for manual or semi-automated assembly lines where reel-based feeding is not utilized.