SI8631AB-B-IS

Digital Isolators Overview

The SI8631AB-B-IS is a Skyworks Solutions digital isolator featuring three channels with two forward and one reverse direction. It utilizes capacitive coupling technology to provide an isolation voltage of 2500 Vrms. The device supports data rates up to 1 Mb/s with a typical propagation delay of 35 ns. It operates within a supply voltage range of 2.5 V to 5.5 V and functions across a temperature range of -40°C to +125°C. Packaged in a 16-SOIC (0.295 inch, 7.50 mm wide) surface-mount format, it offers high common-mode transient immunity.

Digital Isolators Feature Summary

• Capacitive coupling isolation architecture
• Unidirectional channel configuration
• Wide operating supply voltage range
• No start-up initialization required

Digital Isolators Applications

• General purpose signal isolation
• Industrial automation systems
• Power electronics control circuits

Digital Isolators Procurement Notes

Verify the specific suffix 'IS' indicates the standard tube packaging variant rather than tape-and-reel options like 'ISR'. Confirm that the 1 Mbps speed rating aligns with system requirements, as higher-speed variants exist within the same family. Ensure the SOIC-16 package width matches PCB footprint constraints. Cross-reference the manufacturer part number against official Skyworks documentation to avoid confusion with similar automotive or high-voltage models.

Digital Isolators Selection Notes

Select this component when unidirectional isolation at lower data rates is sufficient for the application. The 1 Mbps rate distinguishes it from faster 150 Mbps counterparts in the si863x series. Consider the 2500 Vrms isolation barrier for basic insulation needs. The absence of a shutdown pin simplifies logic design compared to variants offering power-down control. Evaluate thermal dissipation capabilities within the narrow SOIC package for dense layouts.

Digital Isolators Part Context

This part belongs to the si863x series of general-purpose digital isolators from Skyworks Solutions. It shares the core capacitive coupling technology with other members but differs in speed and packaging. The 'AB' designation typically denotes the 1 Mbps speed grade and specific channel configuration within the broader product line.

Digital Isolators Replacement Considerations

SI8631BB-B-IS provides equivalent functionality with increased 150 Mbps data rate capability. SI8631BT-AS offers higher 5 kV isolation voltage for automotive surge applications.