SI88244EC-ISR

Digital Isolators Overview

The SI88244EC-ISR is a general-purpose digital isolator from Skyworks Solutions, featuring four independent channels with unidirectional signal transmission. It integrates an isolated DC-DC converter capable of delivering up to 2W of power, eliminating the need for external bias supplies on the isolated side. The device utilizes capacitive coupling technology to provide a 5000 Vrms isolation voltage rating and supports data rates up to 100 Mb/s. Packaged in a 20-pin SOIC (7.50 mm wide) reel, it operates within a supply voltage range of 3 V to 5.5 V and functions reliably across an extended temperature range of -40°C to +125°C.

Digital Isolators Feature Summary

• Integrates a high-efficiency isolated DC-DC converter to simplify system design by removing the need for secondary-side power supplies.
• Employs advanced capacitive coupling technology to ensure robust signal integrity and high common-mode transient immunity.
• Provides four independent unidirectional channels within a single compact package for efficient multi-channel isolation.
• Supports flexible logic input thresholds compatible with various CMOS and LVTTL standards.

Digital Isolators Applications

• Industrial automation systems requiring reliable signal isolation between control units and field devices.
• Power conversion circuits such as inverters and motor drives where galvanic separation is critical.
• Medical equipment needing strict adherence to safety isolation standards for patient-connected components.
• Energy metering infrastructure utilizing isolated communication interfaces for accurate data transmission.

Digital Isolators Procurement Notes

Verify the specific suffix 'EC' against the manufacturer's current datasheet to confirm exact insulation ratings and qualification status, as variations exist within the Si88244 family. Confirm that the 'ISR' suffix corresponds to the tape-and-reel packaging format required for automated assembly processes. Ensure compatibility with existing PCB footprints designed for the 20-SOIC wide package before finalizing procurement orders.

Digital Isolators Selection Notes

Select this component when a combination of high channel density and integrated power delivery is necessary to reduce bill-of-materials complexity. The 5000 Vrms rating suits applications demanding higher isolation barriers than standard 3750 Vrms devices. Consider the 100 Mb/s data rate capability for high-speed digital communication links. Evaluate the thermal performance of the SOIC-20 package under maximum load conditions to ensure adequate heat dissipation without additional cooling measures.

Digital Isolators Part Context

This part belongs to the Si88xx ISOvolt family of digital isolators, which are designed to replace traditional optocouplers in modern electronic designs. The series offers significant advantages in size, power consumption, and reliability compared to legacy technologies. The SI88244 variant specifically targets applications requiring four isolated channels with integrated power generation, providing a complete isolation solution in a single surface-mount package.

Digital Isolators Replacement Considerations

Direct replacements may include other Skyworks Si88244 variants with different packaging options, such as tube-packaged versions like SI88244BD-AS or SI88244EC-IS. Cross-brand alternatives should be evaluated based on pinout compatibility, isolation voltage ratings, and integrated DC-DC converter specifications to ensure functional equivalence in the target application.