SI88444EC-ISR

Overview

The SI88444EC-ISR is a Skyworks Solutions digital isolator featuring four unidirectional channels with an integrated DC-DC converter. It utilizes capacitive coupling technology to provide 5000 Vrms isolation voltage and supports data rates up to 100 Mb/s. The device operates within a supply voltage range of 3 V to 5.5 V and exhibits a propagation delay of 18 ns. It is housed in a 20-pin SOIC-Wide package, suitable for surface mount installation, and functions reliably across an operating temperature range from -40°C to +125°C.

Feature Summary

• Integrates a high-efficiency DC-DC converter to generate isolated power, eliminating the need for external isolated supplies.
• Employs silicon-based capacitive coupling technology to achieve robust signal transmission across the isolation barrier.
• Provides unidirectional data flow control for each of the four independent channels.

Applications

• Industrial automation systems requiring galvanic isolation
• Medical equipment needing reliable signal separation
• Power electronics interfaces

Procurement Notes

Verify the specific suffix 'ISR' confirms the reel packaging format and wide SOIC-20 footprint. Ensure the design accounts for the integrated DC-DC converter requirements, including appropriate decoupling capacitors on the secondary side. Confirm that the 5000 Vrms isolation rating meets the safety standards required for the target application environment.

Selection Notes

Select this component when a single-chip solution combining four-channel isolation with onboard power generation is required. It is suitable for designs where board space is limited and external isolated power supplies are undesirable. Consider the 100 Mb/s data rate limit and the unidirectional channel configuration against system throughput needs.

Part Context

This part belongs to the Si8844x series of ISOvolt digital isolators. These devices are designed to replace traditional optocouplers by offering higher speed, lower power consumption, and greater reliability. The series integrates CMOS technology with capacitive isolation to provide compact solutions for industrial and commercial applications.

Replacement Considerations

SI88444ED-ISR is a related variant within the same family but may differ in insulation voltage or package details; verify datasheet specifications before substitution.