SI88440ED-IS

Overview

The SI88440ED-IS is a unidirectional digital isolator from the Si88440 series, manufactured by Skyworks Solutions. It features four forward channels with zero reverse channels, housed in a SOIC-Wide-20 package. The device supports data rates up to 100 Mb/s and provides an insulation voltage of 5000 Vrms using capacitive coupling technology. Operating supply voltage ranges from 3 V to 5.5 V. Key timing parameters include a propagation delay of 18 ns, rise/fall times of 2.5 ns, pulse width of 10 ns, and pulse width distortion of 7 ns. It operates within a temperature range of -40°C to +125°C.

Feature Summary

• Integrates four unidirectional digital isolation channels with an internal DC-DC converter for power generation across the isolation barrier.
• Utilizes capacitive coupling technology to achieve high insulation voltage ratings while maintaining signal integrity.
• Supports general-purpose applications with specified timing characteristics including low propagation delay and fast edge rates.

Applications

• Industrial automation systems requiring galvanic isolation
• Medical equipment needing high-voltage safety isolation
• Power electronics control circuits

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for specific packaging requirements such as reel quantities. Ensure that the ordering suffix matches the required insulation voltage and channel configuration. Review lifecycle status, as this part may be marked as Not Recommended for New Designs (NRND). Validate thermal performance against application constraints before finalizing procurement.

Selection Notes

Select this component when high isolation voltage and integrated power conversion are required in a compact SOIC-20 footprint. Compare against similar models like the SI88440EC-IS if lower insulation voltage (3750 Vrms) suffices for the application. Consider the NRND status for long-term supply chain stability. Evaluate thermal dissipation capabilities given the power consumption specifications. Ensure compatibility with existing PCB layout constraints for wide SOIC packages.

Part Context

This part belongs to the Si88440 family of digital isolators from Skyworks Solutions. It shares architectural similarities with other members like the SI88440BD-ISR but differs in insulation voltage ratings and packaging options. The series is designed for robust signal transmission across isolation barriers in demanding environments.

Replacement Considerations

Public confirmed substitute part numbers: SI88440BD-ISR, SI88440EC-IS.