SI88621ED-AS

Overview

The SI88621ED-AS is a dual-channel digital isolator from Skyworks Solutions, featuring an integrated isolated DC-DC converter. It provides two unidirectional data channels with a maximum data rate of 100 Mbps and a typical propagation delay of 18 ns. The device supports a supply voltage range of 3 V to 5.5 V and operates within a temperature range of -40 °C to +125 °C. It utilizes capacitive coupling technology for signal isolation, offering up to 5000 Vrms isolation voltage. The component is housed in a 20-pin SOIC package.

Feature Summary

• Integrates a fully-controlled isolated DC-DC converter with user-adjustable frequency and soft-start functionality.
• Provides high-speed digital isolation with low power consumption and superior noise immunity via RF on/off keying.
• Includes thermal protection and cycle skipping features to enhance reliability under varying load conditions.

Applications

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

Procurement Notes

Verify the manufacturer designation as Skyworks Solutions Inc., noting that Econ Connect may be a distributor or branding variant. Confirm the specific suffix ED-AS corresponds to the intended packaging and configuration against the official datasheet. Ensure compliance with RoHS standards and check for AEC-Q100 qualification if automotive grade is required for the application.

Selection Notes

Select this component when a combined digital isolator and isolated power supply solution is needed to reduce external component count. Consider the 20-SOIC package size and the requirement for an external transformer for the DC-DC converter. Evaluate the need for the specific shutdown and frequency control pins available on the Si886xx series compared to other variants in the family.

Part Context

The SI88621ED-AS belongs to the Si88x2x family of dual digital isolators with integrated DC-DC converters. This family integrates Skyworks' proven digital isolation technology with an on-chip isolated DC-DC converter, providing regulated output voltages. The Si886xx sub-series specifically supports high-voltage configurations and offers programmable switching frequency and soft-start capabilities.

Replacement Considerations

Publicly confirmed substitute part numbers include SI88621BC-ISR and SI88621BD-ISR. These alternatives share similar functional characteristics within the Si8862x family but may differ in packaging type (Reel vs Tube) or specific isolation ratings.