SI8642EA-B-IUR

Digital Isolators Overview

The SI8642EA-B-IUR is a four-channel digital isolator from Skyworks Solutions, utilizing capacitive coupling technology for signal transmission. It features a unidirectional data flow with two forward and two reverse channels. The device supports a maximum data rate of 150 Mb/s and operates within a supply voltage range of 2.375 V to 5.5 V. It provides an insulation voltage of 1000 Vrms and exhibits a propagation delay of 8 ns. The component is housed in a QSOP-16 package and is rated for operation between -40°C and +125°C.

Digital Isolators Feature Summary

• Capacitive coupling isolation architecture
• Four-channel unidirectional signal transmission
• High-speed data processing capability
• Wide operating temperature range

Digital Isolators Applications

• Industrial automation control systems
• Power monitoring and management circuits
• Medical equipment signal isolation
• General-purpose isolated communication interfaces

Digital Isolators Procurement Notes

Verify the specific insulation voltage rating of 1000 Vrms against system requirements, as other variants in the series offer higher ratings. Confirm the QSOP-16 package availability and ensure compatibility with surface-mount assembly processes. Check for AEC-Q100 qualification status if automotive applications are intended, noting that this specific suffix may differ from qualified automotive parts. Validate supply chain authenticity through authorized distributors.

Digital Isolators Selection Notes

Select this component when a 1000 Vrms isolation barrier is sufficient for the application, offering a cost-effective solution compared to higher-rated variants. Consider the 150 Mb/s data rate for high-speed digital signals. Ensure the unidirectional channel configuration matches the circuit design. Evaluate power consumption at 275 mW dissipation against thermal constraints. Compare against other Si864x family members if bidirectional or higher voltage isolation is required.

Digital Isolators Part Context

This part belongs to the Si864x series of digital isolators, which utilize Skyworks' proprietary capacitive coupling technology. The series provides robust isolation for various industrial and commercial applications. The SI8642EA variant specifically denotes the 1000 Vrms insulation level and unidirectional channel arrangement. It complements other series members like the SI8642EB (2.5 kV) and SI8642ED (5 kV) by providing a lower-cost option where extreme isolation voltages are not necessary.

Digital Isolators Replacement Considerations

SI8642BB-B-IU offers similar specifications but with a 2.5 kV insulation rating. SI8642BC-B-IS1 provides 3.75 kV isolation in a SOIC-Narrow-16 package. SI8642ED-B-ISR delivers 5 kV isolation. Verify pinout compatibility and package dimensions before substitution.