SI88642EC-ISR

Overview

The SI88642EC-ISR is a Skyworks Solutions digital isolator featuring four channels with integrated DC-DC conversion. It utilizes capacitive coupling technology to provide an insulation voltage of 3750 Vrms. The device supports a data rate of 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, maximum rise and fall times of 2.5 ns, and a pulse width distortion of 4.5 ns. It functions at a working power current of 10.8 mA and withstands a minimum pulse width of 10 ns. The component is housed in a 24-SOIC package and operates between -40°C and +125°C.

Feature Summary

• Integrates a high-voltage isolated DC-DC converter for simplified power delivery across isolation barriers.
• Employs capacitive coupling technology to achieve robust signal transmission with high common-mode transient immunity.
• Provides unidirectional signal isolation across four independent channels within a compact surface-mount package.

Applications

• Industrial automation systems requiring galvanic isolation
• Medical equipment safety circuits
• Power electronics control interfaces
• Data acquisition systems with high noise environments

Procurement Notes

Verify the specific suffix 'ISR' corresponds to the tape-and-reel packaging configuration rather than tube packaging when sourcing. Confirm that the integrated DC-DC converter requirements align with the target application's power budget. Ensure compliance with moisture sensitivity level (MSL) handling procedures due to the SMD/SMT installation style. Cross-reference the manufacturer part number against official Skyworks documentation to avoid confusion with non-integrated variants.

Selection Notes

Select this component when bidirectional isolation is not required, as it offers only unidirectional channels. The integrated DC-DC converter eliminates the need for external isolated power supplies, reducing board space. Compare the 3750 Vrms insulation rating against system safety standards. Consider the 100 Mb/s data rate limit for high-speed communication needs. Evaluate the 24-SOIC footprint compatibility during PCB layout design.

Part Context

This device belongs to the Si8864x series of digital isolators from Skyworks Solutions. It combines signal isolation with power isolation in a single package. The series targets applications demanding high reliability and compact form factors. It serves as a bridge between low-voltage logic and high-voltage domains in industrial and medical settings.

Replacement Considerations

SI88642ED-IS is a verified substitute offering similar specifications but typically packaged in tubes instead of reels. Verify pinout compatibility and thermal performance before substitution.