SI8641BD-AS2R

Digital Isolators Overview

The SI8641BD-AS2R is a low-power, quad-channel digital isolator from the Si864x series by Skyworks Solutions. It features capacitive coupling technology with an insulation voltage of 5000 Vrms and supports data rates up to 150 Mb/s. The device operates within a supply voltage range of 2.375 V to 5.5 V, drawing a typical operating current of 5.2 mA per channel. It provides unidirectional signal isolation with three forward channels and one reverse channel in a SOIC-16 package. Key electrical parameters include an 8 ns propagation delay, 4 ns rise/fall times, and a pulse width distortion of 0.2 ns. It is qualified for automotive applications under AEC-Q100 standards and functions reliably across a temperature range of -40°C to +125°C.

Digital Isolators Feature Summary

• Capacitive coupling technology ensures high reliability and immunity to magnetic fields
• Integrated power-on reset (POR) circuit maintains safe output states during power transitions
• Fail-safe design guarantees a defined logic state if the input signal is disconnected
• High common-mode transient immunity prevents false triggering in noisy environments

Digital Isolators Applications

• Automotive electronic control units requiring isolated communication interfaces
• Industrial motor drives and inverters for gate driver isolation
• Medical equipment needing reinforced galvanic isolation between circuits
• Power supply systems utilizing isolated feedback loops

Digital Isolators Procurement Notes

Verify that the AS2 suffix corresponds to the specific tape-and-reel packaging configuration required for automated assembly processes. Confirm that the component meets AEC-Q100 qualification requirements for your target automotive application. Ensure the SOIC-16 footprint matches your PCB layout constraints. Check for any specific handling instructions related to moisture sensitivity levels indicated in the datasheet.

Digital Isolators Selection Notes

Select this model when high-speed data transmission up to 150 Mbps is required alongside robust 5 kVrms isolation. The unidirectional channel configuration suits applications where signal flow is strictly one-way. Consider the low power consumption profile for battery-operated or thermally constrained designs. Validate that the 2.375 V minimum supply voltage aligns with your system's logic level requirements.

Digital Isolators Part Context

This component belongs to the Si864x family of digital isolators, which utilize Skyworks' proprietary capacitive isolation technology. Unlike optical isolators, these devices do not require LED drive currents and offer superior longevity. The family includes variants with different insulation voltages and channel configurations to support diverse interface needs in modern electronic systems.

Digital Isolators Replacement Considerations

Direct substitutes within the same family include SI8641BD-AS2 for tube packaging or SI8641BT-AS2 for alternative pinout configurations. Verify that replacement parts maintain identical insulation ratings and data rate specifications to ensure functional compatibility without redesigning the isolation barrier.