SI88644ED-ISR

Overview

The SI88644ED-ISR is a high-speed digital isolator from Skyworks Solutions, featuring four unidirectional channels and an integrated DC-DC converter. It operates within a supply voltage range of 3 V to 5.5 V and supports data rates up to 100 Mb/s. The device provides 5000 Vrms isolation voltage with a minimum common-mode transient immunity of 40 kV/µs. Propagation delay is typically 18 ns, with rise and fall times of 2.5 ns. It functions in temperatures from -40°C to +125°C and is housed in a 24-pin SOIC-Wide package.

Feature Summary

• Integrates a fully-controlled secondary sensing DC-DC converter for isolated power generation
• Provides high-speed signal transmission with 100 Mb/s data rate capability
• Delivers robust isolation performance with 5000 Vrms insulation voltage
• Features high common-mode transient immunity of 40 kV/µs

Applications

• Industrial automation systems requiring galvanic isolation
• Medical equipment needing reliable signal separation
• Power electronics interfaces with high noise environments
• General-purpose digital isolation in harsh operating conditions

Procurement Notes

Verify the specific suffix 'ISR' corresponds to the tape-and-reel packaging format required for automated assembly processes. Confirm that the component status is acceptable for current design implementations, as availability may vary across distribution channels. Ensure compatibility with standard surface-mount reflow profiles during procurement planning.

Selection Notes

Select this component when a single-chip solution combining signal isolation and isolated power delivery is necessary. The integrated DC-DC converter eliminates external transformer requirements, simplifying board layout. Choose this part for applications demanding high CMTI and wide operating temperature ranges within a compact SOIC package.

Part Context

This device belongs to the Si88xxx series of digital isolators designed for high-performance industrial and medical applications. It represents a consolidated solution by integrating both channel isolation and power conversion into a single package, reducing system complexity compared to discrete isolator and converter combinations.

Replacement Considerations

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