SI8661AB-AS1

Digital Isolators Overview

The SI8661AB-AS1 is a six-channel digital isolator from the Si86xx series, manufactured by Skyworks Solutions Inc. It features five forward and one reverse unidirectional channel configuration within a 16-pin SOIC-Narrow package. The device supports a data rate of 1 Mb/s with a propagation delay of 35 ns. It provides an insulation voltage of 2500 Vrms using capacitive coupling technology. Operating parameters include a supply voltage range of 2.5 V to 5.5 V and a typical operating current of 8.8 mA. The component is qualified under AEC-Q100 standards for automotive applications and functions reliably across a temperature range of -40°C to +125°C.

Digital Isolators Feature Summary

• Provides galvanic isolation via capacitive coupling technology for robust signal transmission
• Integrates six independent channels with a specific five-forward and one-reverse polarity arrangement
• Includes shutdown functionality to minimize power consumption during inactive periods
• Certified to AEC-Q100 standards ensuring reliability for demanding automotive environments

Digital Isolators Applications

• Automotive electronic control units requiring isolated communication interfaces
• Industrial motor drive systems needing high-voltage isolation between control and power stages
• General-purpose digital isolation in mixed-signal circuits
• Power supply feedback loops requiring safe voltage level shifting

Digital Isolators Procurement Notes

Verify that the ordering suffix AS1 corresponds to the standard tube packaging format as documented in official Skyworks specifications. Confirm that the specific variant matches the required 1 Mbps data rate and 2500 Vrms insulation rating for your design. Ensure compatibility with the 16-pin SOIC-Narrow footprint during PCB layout. Cross-reference the AEC-Q100 qualification status if automotive compliance is mandatory for the final product assembly.

Digital Isolators Selection Notes

Select this component when a low-speed, cost-effective isolation solution is required for automotive or industrial applications. The 1 Mbps data rate suits slower control signals rather than high-speed data buses. Consider the 8.8 mA operating current for power budget calculations. The single reverse channel limits bidirectional data flow options compared to fully symmetric isolators. Verify that the 2500 Vrms isolation barrier meets the system's safety clearance requirements.

Digital Isolators Part Context

This part belongs to the Si86xx family of ultra-low power digital isolators. It complements higher-speed variants like the SI8661BC which offer 150 Mbps rates. The AB designation typically indicates the lower speed tier within the six-channel lineup. It shares the same physical package dimensions as other members of the series but differs in electrical performance characteristics such as data rate and propagation delay.

Digital Isolators Replacement Considerations

SI8661AB-B-IS1 is a direct substitute offering identical electrical specifications and pinout in an alternative package variant.