SI88620ED-IS

Overview

The SI88620ED-IS is a general-purpose digital isolator from Skyworks Solutions, featuring two unidirectional channels with an integrated isolated DC-DC converter. It utilizes capacitive coupling technology to provide electrical isolation rated at 5000 Vrms. The device supports data rates up to 100 Mb/s and operates within a supply voltage range of 3 V to 5.5 V. Key timing parameters include a propagation delay of 18 ns and rise/fall times of 2.5 ns. It is housed in a 20-SOIC package and is qualified under AEC-Q100 standards for automotive applications.

Feature Summary

• Integrates an isolated DC-DC converter to eliminate the need for external isolated power supplies on the secondary side.
• Provides high common-mode transient immunity (CMTI) of 40 kV/µs to maintain signal integrity in noisy environments.
• Employs silicon dioxide (SiO2) capacitive coupling technology for robust long-term reliability and low skew.

Applications

• Automotive electric vehicle (EV) and hybrid electric vehicle (HEV) battery management systems.
• Industrial automation controllers requiring galvanic isolation between microcontrollers and field devices.
• Medical equipment interfaces needing certified isolation barriers for patient safety.

Procurement Notes

Verify the specific suffix 'IS' corresponds to the standard SOIC-20 package configuration. Confirm that the component meets AEC-Q100 Grade 1 requirements if deploying in automotive contexts. Check current lifecycle status as some variants may be marked NRND; ensure availability aligns with production timelines before finalizing design-in decisions.

Selection Notes

Select this component when bidirectional isolation is not required, as it offers only unidirectional channels. The integrated DC-DC converter simplifies board layout by removing external transformer components but increases quiescent current consumption compared to non-converter isolators. Ensure the input logic levels are compatible with the 3 V to 5.5 V operating range.

Part Context

This part belongs to the Si886xx family of digital isolators with integrated power converters. It shares architectural similarities with the SI88620BC-IS but differs in insulation voltage ratings and qualification standards. The family targets high-reliability applications where space constraints preclude discrete isolation solutions.

Replacement Considerations

The SI88620BC-IS is a related variant within the same series but typically features lower insulation voltage ratings (e.g., 3750 Vrms). Verify that the reduced isolation rating of potential substitutes meets the system's safety clearance requirements. Cross-reference pinouts to ensure compatibility with existing PCB footprints.