SI8645BA-AS1

Digital Isolators Overview

The SI8645BA-AS1 is an automotive-grade, quad-channel digital isolator from the Si864x series by Skyworks Solutions. It utilizes capacitive coupling technology to provide electrical isolation with a rated insulation voltage of 1000 Vrms. The device supports unidirectional signal transmission across four independent channels at data rates up to 150 Mb/s. Key electrical parameters include a maximum propagation delay of 8 ns and typical rise/fall times of 4 ns. It operates on a single power supply ranging from 2.5 V to 5.5 V, with a typical quiescent current of 6.1 mA per channel. The component is housed in a 16-pin SOIC package and is qualified under AEC-Q100 standards for automotive applications.

Digital Isolators Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for reliability in vehicle environments
• Capacitive coupling isolation architecture providing robust noise immunity
• Quad-channel unidirectional configuration for multi-signal isolation
• Ultra-low power consumption design suitable for energy-efficient systems

Digital Isolators Applications

• Automotive electronic control units (ECUs)
• Inverter gate drive circuits
• Isolated communication interfaces in electric vehicles
• Safety-critical automotive sensor interfaces

Digital Isolators Procurement Notes

Verify that the specific suffix AS1 corresponds to the intended automotive grade and packaging configuration. Confirm the insulation rating matches the system requirement of 1000 Vrms. Ensure compatibility with the required 16-pin SOIC footprint during PCB layout. Check for RoHS compliance status if environmental regulations apply to the final assembly.

Digital Isolators Selection Notes

Select this component when automotive certification is mandatory and high-speed unidirectional isolation is required. Compare against other Si864x variants if higher insulation voltages or bidirectional channels are needed. Consider the 150 Mb/s data rate limit for signal integrity requirements. Evaluate power budget constraints given the 6.1 mA per channel operating current.

Digital Isolators Part Context

This part belongs to the Si864x family of low-power digital isolators. It shares architectural similarities with other members like the SI8645BB and SI8645BC, which offer higher insulation ratings. The BA designation typically indicates the 1000 Vrms insulation level within this product line.

Digital Isolators Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation.