SI88443ED-ASR

Overview

The SI88443ED-ASR is a general-purpose digital isolator from Skyworks Solutions, housed in a 20-SOIC package. It features four unidirectional channels with one forward and three reverse paths. The device supports data rates up to 100 Mb/s and offers an insulation voltage of 5000 Vrms. Operating on a supply voltage between 3 V and 5.5 V, it draws 9.5 mA of working current. Key electrical parameters include a propagation delay of 18 ns, rise/fall times of 2.5 ns, and pulse width distortion of 4.5 ns. It operates within a temperature range of -40°C to +125°C.

Feature Summary

• Provides galvanic isolation for high-speed digital signals using capacitive coupling technology.
• Features unidirectional signal transmission with dedicated forward and reverse channel configurations.
• Ensures signal integrity through high common-mode transient immunity capabilities.

Applications

• Industrial automation systems requiring robust signal isolation
• Medical equipment needing safe patient isolation barriers
• Power electronics control circuits for noise reduction

Procurement Notes

Verify the specific suffix ASR against official Skyworks documentation to confirm reel packaging and moisture sensitivity level. Ensure compatibility with RoHS3 standards if required by your manufacturing process. Cross-reference the 20-SOIC footprint dimensions with your PCB design guidelines before finalizing procurement orders.

Selection Notes

Select this component when unidirectional isolation is sufficient for the application architecture. The 20-SOIC package accommodates higher channel counts compared to smaller footprints. Consider the 5000 Vrms rating for applications demanding significant potential differences between isolated domains without additional external components.

Part Context

This part belongs to the Si8844x family of digital isolators designed for general-purpose use. It utilizes Skyworks' proprietary capacitive isolation technology to achieve high reliability and low power consumption. The series is engineered to replace legacy optocouplers in modern electronic designs requiring faster data rates and better performance consistency.

Replacement Considerations

SI88443BC-ISR is listed as a similar substitute option. Verify pinout compatibility and electrical parameter equivalence before swapping. Ensure the replacement part meets the same thermal and insulation requirements for the target application.