SI88420ED-AS

Overview

The SI88420ED-AS is a dual-channel digital isolator with an integrated isolated DC-DC converter, manufactured by Skyworks Solutions. It operates within a supply voltage range of 3 V to 5.5 V and supports data rates up to 100 Mb/s. The device provides 5000 Vrms isolation voltage using capacitive coupling technology. Key electrical parameters include a typical propagation delay of 18 ns, maximum rise and fall times of 2.5 ns, and a power dissipation rating of 2.27 W. It functions reliably across a temperature range of -40 °C to +125 °C and is housed in a 20-pin SOIC-Wide package.

Feature Summary

• Integrates two unidirectional digital isolation channels with an on-chip isolated DC-DC converter for regulated output voltages.
• Features fully-integrated secondary sensing feedback controlled conversion with dithering for low electromagnetic interference (EMI).
• Provides high transient immunity and ultra-low emissions suitable for demanding industrial environments.
• Includes thermal protection circuitry to prevent permanent damage during over-temperature events.

Applications

• Industrial automation systems
• Hybrid electric and electric vehicles
• Isolated power supplies
• Data acquisition systems

Procurement Notes

Verify the specific ordering suffix 'AS' against official Skyworks documentation to confirm package type and tape-and-reel specifications. Confirm RoHS compliance status and check for any automotive-grade variants if AEC-Q100 qualification is required for the target application environment.

Selection Notes

Select this component when a combined signal isolation and isolated power generation solution is needed in a single package. Ensure the external transformer matches the specified input/output voltage configuration. Verify that the required isolation barrier distance meets safety regulatory standards such as UL 1577 or VDE 60747-17.

Part Context

This part belongs to the Si88x2x family of dual digital isolators with integrated DC-DC converters. The family includes variants with different channel counts and DC-DC features, all sharing the same core capacitive isolation technology and packaging options like SOIC-16 wide-body and SOIC-20 wide-body.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Consult manufacturer cross-reference tools for potential alternatives.