SI8640BA-AU

Digital Isolators Overview

The SI8640BA-AU is a low-power, quad-channel digital isolator from the Si864x series by Skyworks Solutions. It features four forward channels with unidirectional signal transmission using capacitive coupling technology. The device supports data rates up to 150 Mb/s and provides an insulation voltage of 1000 Vrms. It operates within a supply voltage range of 2.375 V to 5.5 V and consumes 6.1 mA of operating current. Key electrical parameters include an 8 ns propagation delay, 4 ns rise/fall times, and a 5 ns pulse width capability with 0.2 ns distortion. It is AEC-Q100 qualified for automotive applications and functions in temperatures from -40°C to +125°C.

Digital Isolators Feature Summary

• Capacitive coupling isolation technology ensures high reliability and immunity to magnetic fields.
• AEC-Q100 qualification confirms suitability for demanding automotive electronic environments.
• Ultra-low power consumption design minimizes energy usage in battery-operated systems.
• Integrated logic polarity simplifies interface connections without external components.

Digital Isolators Applications

• Automotive gate driver circuits
• Industrial motor control systems
• Power supply feedback loops
• Inverter and converter interfaces

Digital Isolators Procurement Notes

Verify that the ordering suffix matches the required package type and tape/reel specifications. Confirm AEC-Q100 certification status if automotive compliance is mandatory. Check moisture sensitivity level requirements for proper storage and handling procedures. Ensure the supplier provides valid traceability documentation for quality assurance purposes.

Digital Isolators Selection Notes

Select this component when four isolated channels are required for unidirectional signals. Compare against other Si864x variants based on specific insulation voltage needs and channel configurations. Consider the QSOP-16 package constraints for PCB layout space. Evaluate power budget requirements against the 6.1 mA typical current draw.

Digital Isolators Part Context

This part belongs to the Si864x family of digital isolators, which utilizes Skyworks' proprietary capacitive isolation process. The BA-AU suffix indicates a specific automotive-grade variant with a QSOP-16 package. It replaces older transformer-based or optical isolators in modern high-speed digital interfaces.

Digital Isolators Replacement Considerations

Direct pin-compatible alternatives within the Si864x family may exist but require verification of channel count and insulation ratings. Cross-reference with SI8640BC-AU or similar variants only if package and electrical specs align exactly.