SI88643EC-ISR

Overview

The SI88643EC-ISR is a general-purpose digital isolator from Skyworks Solutions, featuring four unidirectional channels and an integrated DC-DC converter. It provides 5000 Vrms isolation voltage with capacitive coupling technology. The device supports data rates up to 100 Mb/s and operates within a supply voltage range of 3 V to 5.5 V. Key electrical parameters include a propagation delay of 18 ns, rise/fall times of 2.5 ns, and a common-mode transient immunity of 40 kV/µs. It is housed in a 24-SOIC package.

Feature Summary

• Integrates a high-efficiency DC-DC converter for isolated power generation
• Provides robust capacitive coupling isolation for noise immunity
• Supports high-speed data transmission at 100 Mb/s

Applications

• Industrial automation systems
• Inverter and motor drive circuits
• Programmable logic controller (PLC) input/output modules

Procurement Notes

Verify the specific suffix 'ISR' corresponds to the tape-and-reel packaging format required for automated assembly processes. Confirm that the 5000 Vrms isolation rating aligns with safety standards applicable to your target application environment. Ensure the SOIC-24 footprint matches the design board layout constraints before finalizing procurement orders.

Selection Notes

Select this component when a single-chip solution combining signal isolation and isolated power delivery is necessary. It is suitable for designs requiring high channel density and low latency. Consider the 40 kV/µs CMTI rating for environments with significant electrical noise. Evaluate the thermal performance given the integrated converter's power dissipation characteristics.

Part Context

This part belongs to the Si88xx ISOvolt family, which utilizes CMOS technology to replace traditional optocouplers. The series aims to reduce system size, cost, and power consumption while enhancing reliability. It is designed for industrial applications demanding high-performance isolation between control and power stages.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.