SI88643ED-ASR

Overview

The SI88643ED-ASR is a general-purpose digital isolator from Skyworks Solutions, featuring four channels with one forward and three reverse paths. It operates at a data rate of 100 Mb/s with a propagation delay of 18 ns. The device provides 5000 Vrms isolation voltage using capacitive coupling technology. It supports a supply voltage range of 3 V to 5.5 V and includes a shutdown function. Packaged in a 24-SOIC (Wide) format on a reel, it functions within an operating temperature range of -40°C to +125°C.

Feature Summary

• Integrates a DC-DC converter for isolated power delivery
• Provides high common-mode transient immunity via capacitive coupling
• Includes a dedicated shutdown control pin for power management

Applications

• Industrial automation systems requiring galvanic isolation
• Medical equipment with safety isolation requirements
• Power electronics monitoring and control interfaces

Procurement Notes

Verify the specific suffix 'ASR' against official Skyworks documentation to confirm package type and tape-and-reel configuration. Confirm RoHS compliance status through current datasheets. Check for Not Recommended for New Design (NRND) status if applicable to long-term supply planning. Ensure ESD handling protocols are followed during assembly due to moisture sensitivity classification.

Selection Notes

Select this component when bidirectional isolation is not required, as it is unidirectional. Compare pulse width distortion specifications against system timing constraints. Evaluate the integrated DC-DC converter efficiency against external power solutions. Verify that the 24-SOIC wide footprint fits the target PCB layout constraints.

Part Context

This part belongs to the Si8864x family of digital isolators. It shares architectural similarities with other variants like the SI88643ED-ISR but differs in packaging and orientation. The series is designed for applications needing robust signal integrity across isolation barriers.

Replacement Considerations

Publicly confirmed substitutes include SI88643ED-ISR and SI88643BC-IS. Verify pinout compatibility and electrical parameter equivalence before substitution.