SI8645ET-AS2R

Digital Isolators Overview

The SI8645ET-AS2R 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 operates within a supply voltage range of 2.5 V to 5.5 V. The device provides 5000 Vrms isolation via capacitive coupling and supports a maximum operating temperature of +125 °C. Key electrical parameters include an 8 ns propagation delay, 4 ns rise/fall times, and a typical supply current of 6.1 mA. It is housed in a 16-SOIC package and is AEC-Q100 qualified for automotive applications.

Digital Isolators Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for reliability in vehicle environments
• High common-mode transient immunity capability supporting robust signal integrity in noisy systems
• Ultra-low power consumption design optimized for energy-efficient operation
• Capacitive coupling technology providing galvanic isolation without magnetic interference

Digital Isolators Applications

• Automotive gate driver circuits for motor control
• Inverter and converter control systems
• On-board charging (OBC) interfaces
• Battery management system communication links

Digital Isolators Procurement Notes

Verify the specific suffix AS2R indicates reel packaging when sourcing. Confirm AEC-Q100 certification status for your automotive application requirements. Ensure the 16-SOIC footprint matches your PCB layout constraints. Cross-reference the manufacturer part number with official Skyworks documentation to avoid counterfeit components.

Digital Isolators Selection Notes

Select this component for designs requiring four isolated channels with high speed and low power. The 150 Mb/s data rate suits standard industrial and automotive protocols. Consider the 5000 Vrms isolation rating for safety-critical boundaries. The wide operating temperature range allows use in harsh thermal environments without derating concerns.

Digital Isolators Part Context

This device belongs to the Si864x family of digital isolators, which are designed for general-purpose and automotive applications. The family utilizes Skyworks' proprietary iCoupler technology for reliable signal transmission across isolation barriers. The SI8645 variant specifically offers four forward channels, distinguishing it from lower-channel-count models in the same series.

Digital Isolators Replacement Considerations

SI8645ET-AS2 is a tube-packaged equivalent of the same functional device. Verify pinout compatibility before substitution. Other members of the Si864x series may offer different channel counts but share similar electrical characteristics.