SI8642AB-B-ISR

Digital Isolators Overview

The SI8642AB-B-ISR is a Skyworks Solutions digital isolator featuring four channels with unidirectional signal paths. It operates within a supply voltage range of 2.375 V to 5.5 V and supports data rates up to 1 Mbps. The device provides an isolation voltage of 2500 Vrms using capacitive coupling technology. Key electrical parameters include a propagation delay of 35 ns, rise time of 4 ns, and fall time of 4 ns. Power dissipation is rated at 415 mW. It functions reliably across an operating temperature range from -40°C to +125°C and meets AEC-Q100 automotive qualification standards.

Digital Isolators Feature Summary

• Four-channel digital isolation with unidirectional signal transmission capability
• Capacitive coupling technology for high-speed signal integrity
• Automotive-grade reliability compliant with AEC-Q100 standards
• Wide operating temperature range suitable for harsh environments

Digital Isolators Applications

• Automotive electronic control units requiring galvanic isolation
• Industrial communication interfaces needing noise immunity
• Power conversion systems with isolated gate drive requirements
• Medical equipment demanding safe patient isolation

Digital Isolators Procurement Notes

Verify the specific suffix 'B' indicates the correct insulation voltage rating of 2500 Vrms as documented in official Skyworks datasheets. Confirm package type matches SOIC-Wide-16 specifications. Ensure compliance with RoHS directives and AEC-Q100 automotive qualification requirements before integration into final designs.

Digital Isolators Selection Notes

Select this component when unidirectional isolation is required for four independent channels. Consider the 1 Mbps data rate limit for application bandwidth needs. Evaluate thermal management requirements given the 415 mW power dissipation rating. Verify that the 2500 Vrms isolation barrier meets system safety standards compared to higher-rated variants like the SI8642ED series.

Digital Isolators Part Context

Part of the Si864x family of digital isolators offering robust performance for industrial and automotive applications. This specific variant focuses on cost-effective solutions with moderate isolation voltage requirements. It complements other members of the series that offer higher voltage ratings or bidirectional capabilities.

Digital Isolators Replacement Considerations

SI8642AB-B-IS (Tube packaging) offers identical electrical characteristics but differs in package format. SI8642BC-B-ISR provides higher 3750 Vrms isolation with narrow SOIC package. SI8642ED-B-ISR offers 5 kV isolation. Verify pinout compatibility and thermal performance when substituting.