SI88443ED-ISR

Overview

The SI88443ED-ISR is a Skyworks Solutions digital isolator featuring four unidirectional channels with an integrated DC-DC converter. It operates within a supply voltage range of 3 V to 5.5 V and provides 5000 Vrms insulation via capacitive coupling. The device supports data rates up to 100 Mb/s, with propagation delays of 18 ns and rise/fall times of 2.5 ns. It functions in temperatures from -40°C to +125°C, housed in a 20-pin SOIC-Wide package.

Feature Summary

• Integrates a high-voltage DC-DC converter for isolated power generation
• Provides robust capacitive coupling isolation technology
• Includes shutdown functionality for power management

Applications

• Industrial automation systems requiring galvanic isolation
• Medical equipment needing high-voltage safety compliance
• Power electronics interfaces with integrated power needs

Procurement Notes

This component carries an NRND (Not Recommended for New Designs) status, indicating it is obsolete for new projects. Verify current availability through authorized distributors, as stock levels may be limited. Ensure the specific 20-SOIC package matches your PCB footprint requirements before ordering.

Selection Notes

Select this part when a single-channel input requires isolation across four outputs with onboard power conversion. The 5000 Vrms rating suits high-noise environments. Compare against the SI88443BC-ISR if lower insulation voltage suffices, or consider the SI88644ED-ISR for bidirectional applications.

Part Context

Part of the Si88443 series, this device combines digital isolation with power delivery. It simplifies designs by eliminating external isolated power supplies. The wide operating temperature range ensures reliability in harsh industrial conditions.

Replacement Considerations

Public confirmed substitutes include SI88443BC-ISR for lower voltage isolation requirements.