SI88442EC-IS

Overview

The SI88442EC-IS is a Skyworks Solutions digital isolator featuring four channels with integrated DC-DC conversion. It utilizes capacitive coupling technology to provide an isolation voltage of 3750 Vrms. The device supports a data rate of 100 Mb/s and operates within a supply voltage range of 3 V to 5.5 V. Key electrical parameters include a propagation delay of 18 ns, rise and fall times of 2.5 ns, and a pulse width distortion of 7 ns. It is housed in a SOIC-Wide-20 package and is qualified under AEC-Q100 standards for automotive applications.

Feature Summary

• Integrates a high-efficiency DC-DC converter to eliminate the need for external isolated power supplies.
• Employs proprietary capacitive coupling technology for robust signal transmission across isolation barriers.
• Features unidirectional channel polarity configuration for specific directional data flow requirements.

Applications

• Automotive electronic control units requiring AEC-Q100 qualification
• Industrial communication interfaces such as CAN and LIN bus systems
• General-purpose digital isolation in mixed-signal environments

Procurement Notes

Verify the specific suffix 'IS' corresponds to the SOIC-Wide-20 package variant rather than standard SOIC. Confirm AEC-Q100 automotive qualification status if the application demands automotive-grade reliability. Check for moisture sensitivity level (MSL) handling requirements during storage and reflow soldering processes to ensure component integrity.

Selection Notes

Select this model when a single-channel input requires four isolated outputs with integrated power generation. The 3750 Vrms rating suits general industrial isolation needs, while AEC-Q100 certification enables use in automotive contexts. Ensure the 100 Mb/s data rate meets system timing constraints and that the wide-body package fits the PCB footprint limitations.

Part Context

This component belongs to the Si8844x series of digital isolators from Skyworks Solutions. The series is characterized by the integration of on-chip DC-DC converters, which simplifies system design by providing isolated power alongside signal isolation. The EC suffix typically denotes the wide-body package option, distinguishing it from standard narrow packages within the same functional family.

Replacement Considerations

SI88442BD-IS: Offers 5000 Vrms isolation but uses a standard SOIC-20 package instead of the wide variant.

FAQ

What is the maximum common-mode transient immunity (CMTI) specified for this device?

The datasheet specifies a CMTI of 40 kV/µs for reliable operation in noisy environments.

Does the integrated DC-DC converter require external components?

No, the DC-DC converter is fully integrated on-chip, eliminating the need for external inductors or capacitors for power generation.