SI8645ET-AS

Digital Isolators Overview

The SI8645ET-AS is an automotive-grade digital isolator from the Si864x series, manufactured by Skyworks Solutions. It features four unidirectional channels with a data rate of 150 Mb/s and a propagation delay of 8 ns. The device provides 5000 Vrms isolation voltage using capacitive coupling technology. It operates on a supply voltage range of 2.5 V to 5.5 V with a typical operating current of 6.1 mA. Packaged in a SOIC-16 surface-mount format, it supports an extended temperature range from -40°C to +125°C and holds AEC-Q100 qualification.

Digital Isolators Feature Summary

• Automotive-grade reliability certified under AEC-Q100 standards for harsh environment operation
• High-voltage galvanic isolation capability via robust capacitive coupling architecture
• Ultra-low power consumption design suitable for energy-efficient system applications
• Integrated high-speed signal transmission with minimal pulse width distortion

Digital Isolators Applications

• Automotive electronic control units requiring isolated communication interfaces
• Industrial motor drives and inverters needing high-voltage protection
• Medical equipment requiring reinforced isolation for patient safety
• Power supply systems utilizing isolated gate drive circuits

Digital Isolators Procurement Notes

Verify the specific suffix ET-AS corresponds to the SOIC-16 package and tube packaging configuration. Confirm that the AEC-Q100 qualification status meets your project's automotive grade requirements. Ensure compatibility with the specified 2.5 V to 5.5 V supply voltage range. Check for moisture sensitivity level handling procedures during assembly. Validate that the 5000 Vrms isolation rating satisfies your system's safety insulation needs.

Digital Isolators Selection Notes

Select this component when four unidirectional isolated channels are required within an automotive or industrial context. The 150 Mb/s data rate supports high-speed protocols like CAN FD or SPI. Consider the SOIC-16 footprint for PCB layout constraints. The low propagation delay ensures timing integrity in critical control loops. Evaluate the 6.1 mA current draw against total system power budgets.

Digital Isolators Part Context

This part belongs to the Si864x family of digital isolators, which offers various channel counts and isolation voltages. The SI8645 variant specifically provides four forward channels with no reverse channels. It shares core technological features with other members of the series but differs in channel configuration and insulation ratings. The ET-AS suffix denotes the specific package and automotive qualification tier.

Digital Isolators Replacement Considerations

SI8645BB-AS serves as a lower isolation voltage alternative within the same series. SI8640ET-IS is another option offering similar performance characteristics. Verify pinout compatibility and electrical specifications before substitution. Ensure the replacement part meets the same AEC-Q100 automotive qualification standards.