SI8655BA-AS

Digital Isolators Overview

The SI8655BA-AS is a Skyworks Solutions automotive-grade digital isolator featuring five unidirectional channels. It utilizes capacitive coupling technology to provide 1000 Vrms isolation voltage. The device supports data rates up to 150 Mb/s with a typical propagation delay of 8 ns and rise/fall times of 4 ns. Operating on a supply voltage range of 2.5 V to 5.5 V, it draws approximately 7 mA of quiescent current. Packaged in a 16-pin SOIC (SOIC-16) tube, it functions within a temperature range of -40°C to +125°C.

Digital Isolators Feature Summary

• Provides high-speed digital signal transmission across isolation barriers using capacitive coupling technology.
• Designed for automotive applications with qualification to AEC-Q100 standards.
• Offers robust common-mode transient immunity to protect sensitive circuitry from noise.
• Delivers reliable electrical isolation between low-voltage control circuits and high-voltage power stages.

Digital Isolators Applications

• Automotive electric vehicle (EV) and hybrid electric vehicle (HEV) battery management systems
• On-board charging (OBC) and DC-DC converter gate drive interfaces
• Motor control and inverter driver circuits
• High-voltage sensing and monitoring systems

Digital Isolators Procurement Notes

Verify the specific suffix 'AS' indicates the SOIC-16 tube packaging configuration. Confirm that the 'BA' designation aligns with the required 1 kV isolation rating and automotive grade specifications. Ensure compatibility with the target PCB footprint for the 16-pin wide SOIC package. Check for moisture sensitivity level requirements during storage and handling.

Digital Isolators Selection Notes

Select this component when five isolated bidirectional or unidirectional channels are required in an automotive environment. The 1 kV RMS isolation rating suits most low-to-medium voltage automotive power electronics. Consider the 150 Mb/s data rate limit for communication speed requirements. The SOIC-16 package offers a balance between pin count and board space compared to wider packages.

Digital Isolators Part Context

This part belongs to the Si865x family of digital isolators from Skyworks Solutions. The family includes variants with different channel counts (3, 4, 5, 6) and isolation voltages (1 kV, 2.5 kV, 5 kV). The SI8655 variant specifically provides five channels, making it suitable for complex multi-phase motor drives or extensive sensor arrays in automotive platforms.

Digital Isolators Replacement Considerations

Direct substitutes include other Skyworks Si8655 variants with matching isolation ratings and channel counts, such as SI8655BD-B-ISR for higher isolation or different packaging. Cross-manufacturer replacements require verifying equivalent isolation voltage, data rate, and package dimensions.