SI88640ED-AS

Overview

The SI88640ED-AS is a high-speed digital isolator featuring an integrated, feedback-controlled DC-DC converter. It provides four unidirectional channels with a data rate of 100 Mbps and isolation voltage of 5000 Vrms. The device utilizes capacitive coupling technology and operates within a supply voltage range of 3 V to 5.5 V. Key electrical parameters include a propagation delay of 18 ns and common-mode transient immunity of 40 kV/µs. It is housed in a 24-SOIC package and supports an operating temperature range from -40°C to +125°C.

Feature Summary

• Integrates a fully-featured secondary sensing feedback-controlled DC-DC converter for isolated power generation
• Provides high-speed signal isolation with 100 Mbps data rate capability across four channels
• Utilizes capacitive coupling technology for robust noise immunity and reliable operation

Applications

• Automotive systems requiring isolated communication interfaces
• Industrial automation controllers needing galvanic isolation
• Medical equipment requiring safety-certified signal isolation

Procurement Notes

Verify the specific suffix 'AS' against the manufacturer's current datasheet to confirm pinout and packaging details. Confirm RoHS compliance status as indicated in official documentation. Check for any recent lifecycle notices or obsolescence warnings directly from Skyworks Solutions Inc. before finalizing procurement plans.

Selection Notes

Select this component when an integrated isolated power supply is required alongside signal isolation to reduce external component count. Ensure the 5000 Vrms isolation rating meets system safety requirements. Verify that the 100 Mbps data rate satisfies the application's bandwidth needs and that the SOIC-24 package fits the PCB layout constraints.

Part Context

This part belongs to the SI8864x family of digital isolators designed for automotive and industrial applications. It leverages a true automotive process for design and manufacturing. The series integrates isolation technology with power conversion, distinguishing it from standard isolators that require external isolated power sources.

Replacement Considerations

Check for direct substitutes within the SI8864x family such as SI88640ED-IS or SI88641ED-IS. Verify compatibility regarding channel configuration, package type, and electrical specifications before substitution.