SI8645BB-AS1

Digital Isolators Overview

The SI8645BB-AS1 is an automotive-grade, ultra-low power quad-channel digital isolator from the Si864x series. It provides 2500 Vrms isolation via capacitive coupling in a 16-pin SOIC package. The device supports unidirectional signal transmission at data rates up to 150 Mb/s with a propagation delay of 8 ns. Operating on a single supply voltage between 2.5 V and 5.5 V, it draws only 6.1 mA per channel. Certified under AEC-Q100, it functions reliably within a temperature range of -40°C to +125°C.

Digital Isolators Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for reliability
• Ultra-low power consumption optimized for energy-efficient designs
• High-speed data transmission capability up to 150 Mb/s
• Robust capacitive coupling technology ensuring electrical isolation

Digital Isolators Applications

• Automotive electronic control units (ECUs)
• Inverter gate drive circuits
• Industrial communication interfaces
• Power metering systems

Digital Isolators Procurement Notes

Verify the specific suffix AS1 corresponds to the tube packaging format as indicated by distributor listings. Confirm that the 2.5 kV insulation rating meets the system's safety requirements. Ensure compatibility with the 16-SOIC footprint during PCB layout. Check for moisture sensitivity level compliance if storage conditions exceed specified limits.

Digital Isolators Selection Notes

Select this component when automotive certification is mandatory and low power dissipation is critical. The 2500 Vrms rating suits applications requiring moderate isolation strength. Compare against the SI8645BC variant if higher 3750 Vrms isolation is necessary. Consider the fixed unidirectional polarity when designing signal paths across isolation boundaries.

Digital Isolators Part Context

This part belongs to the Skyworks Si864x family of digital isolators. These devices utilize proprietary silicon dioxide (SiO2) isolation technology. The family offers various channel counts and isolation ratings. The SI8645BB-AS1 specifically targets high-reliability automotive environments requiring robust noise immunity.

Digital Isolators Replacement Considerations

The SI8645BC-B-IS1 serves as a higher-isolation alternative within the same package. Verify pinout compatibility before substitution. Other family members like SI8640 may offer different isolation voltages or channel configurations.