SI8642AB-AS1R

Digital Isolators Overview

The Skyworks SI8642AB-AS1R is a four-channel digital isolator from the Si864x series, utilizing capacitive coupling technology. It supports data rates up to 150 Mb/s with a propagation delay of 8 ns and rise/fall times of 4 ns. The device operates on a supply voltage range of 2.375 V to 5.5 V, consuming 4.4 mA of quiescent current. It features an isolation voltage of 1 kVrms and functions within a temperature range of -40 °C to +125 °C. Packaged in a 16-pin QSOP, it meets AEC-Q100 automotive standards.

Digital Isolators Feature Summary

• Four-channel capacitive coupling for robust signal isolation
• High-speed data transmission up to 150 Mb/s
• Automotive-grade reliability compliant with AEC-Q100
• Wide operating temperature range for harsh environments

Digital Isolators Applications

• Automotive electronic control units (ECUs)
• Industrial communication interfaces
• Sensor isolation in motor drives
• Power supply feedback loops

Digital Isolators Procurement Notes

Verify the specific suffix AS1R indicates reel packaging when sourcing. Confirm the 1 kVrms isolation rating matches system requirements, as other variants offer higher voltages. Ensure the QSOP-16 package footprint aligns with PCB layout constraints. Check for AEC-Q100 certification if automotive qualification is mandatory. Validate supply chain authenticity through authorized distributors.

Digital Isolators Selection Notes

Choose this model for applications requiring moderate isolation voltage with high-speed data integrity. Compare against higher voltage variants like SI8642BD if system noise levels demand greater insulation. Consider power consumption limits, as this device draws 4.4 mA. Evaluate thermal management needs given the 125 °C maximum junction temperature. Ensure compatibility with existing logic levels across the 2.375 V to 5.5 V range.

Digital Isolators Part Context

Part of the Si864x family, offering four isolated channels in a compact surface-mount package. Designed for general-purpose digital isolation in demanding environments. Provides bidirectional or unidirectional signal paths depending on configuration. Integrates low-power operation with high-speed performance for efficient system design.

Digital Isolators Replacement Considerations

SI8642BA-AU offers similar specifications with alternative packaging options. SI8642BC-B-IS1R provides 3.75 kVrms isolation for higher voltage applications. SI8642ED-AS2 delivers 5 kVrms isolation with identical channel count. Verify pinout compatibility before substitution.