SI88444EC-IS

Overview

The SI88444EC-IS is a Skyworks Solutions digital isolator featuring four unidirectional channels and an integrated DC-DC converter. It provides 3750 Vrms isolation voltage with capacitive coupling technology. 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 electrical parameters include a propagation delay of 18 ns, rise/fall times of 2.5 ns, and a pulse width distortion of 4.5 ns. It functions reliably between -40°C and +125°C in a 20-SOIC package.

Feature Summary

• Integrates a high-efficiency isolated DC-DC converter to power the secondary side without external components
• Utilizes silicon dioxide (SiO2) capacitive coupling for robust signal transmission across isolation barriers
• Features unidirectional channel configuration optimized for specific signal flow requirements

Applications

• Industrial automation systems requiring galvanic isolation
• Power monitoring circuits with high common-mode transient immunity
• Medical equipment needing reliable signal separation

Procurement Notes

Verify the specific suffix 'EC-IS' against the manufacturer's official datasheet to confirm the 3750 Vrms rating and integrated DC-DC functionality. Ensure compatibility with the 20-SOIC wide package dimensions and check for any design-not-recommended status updates from Skyworks before finalizing procurement plans.

Selection Notes

Select this component when a single-chip solution combining four-channel isolation with onboard power conversion is required. It is suitable for designs needing high CMTI and operation at elevated temperatures up to 125°C. Consider the unidirectional nature of the channels during schematic design to ensure correct signal routing.

Part Context

This part belongs to the Si8844x family of general-purpose digital isolators from Skyworks Solutions. The series is characterized by its integration of isolated power supplies, reducing bill-of-materials complexity. The EC-IS variant specifically denotes the 3750 Vrms insulation rating and SOIC-20 packaging format within this product line.

Replacement Considerations

Consult Skyworks official documentation for direct pin-compatible substitutes within the Si8844x family. Verify that alternative parts match the 3750 Vrms isolation requirement and integrated DC-DC capability if power generation on the secondary side is necessary.