SI88321BD-ISR

Digital Isolators Overview

The SI88321BD-ISR is a Skyworks Solutions digital isolator featuring two unidirectional channels and an integrated DC-DC converter. It operates within a 3 V to 5.5 V supply range and supports data rates up to 100 Mb/s. The device provides 5000 Vrms isolation voltage with a propagation delay of 18 ns. It utilizes capacitive coupling for signal transmission and offers a common-mode transient immunity of 40 kV/µs. Packaged in a 20-SOIC (7.50 mm width) format, it functions reliably between -40°C and +125°C.

Digital Isolators Feature Summary

• Integrates a high-efficiency DC-DC converter to provide isolated power supplies for the secondary side without external components.
• Employs silicon dioxide (SiO2) capacitive coupling technology to ensure robust signal isolation and high reliability.
• Features unidirectional channel configuration optimized for general-purpose digital signal transmission across isolation barriers.

Digital Isolators Applications

• Industrial automation systems requiring galvanic isolation between control logic and field devices.
• Medical equipment needing safe separation between patient-connected circuits and main processing units.
• Power electronics interfaces where high-voltage noise immunity is critical for stable operation.

Digital Isolators Procurement Notes

Verify the specific suffix 'ISR' confirms the tape-and-reel packaging variant suitable for automated surface-mount assembly processes. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure design compatibility with the required isolation voltage ratings and thermal management specifications for the target operating environment.

Digital Isolators Selection Notes

Select this component when an integrated isolated power source is required alongside signal isolation to reduce bill-of-materials complexity. Compare against non-integrated variants if external power conversion is preferred or if bidirectional communication capabilities are necessary instead of unidirectional paths.

Digital Isolators Part Context

This part belongs to the Si8832x family of high-speed digital isolators from Skyworks Solutions. These devices are designed to replace traditional optocouplers in modern applications, offering superior performance metrics including higher data rates, lower power consumption, and greater consistency in electrical characteristics over temperature variations.

Digital Isolators Replacement Considerations

Public confirmed substitute part numbers: SI88321BC-AS, SI88321ED-IS, SI88322BD-ISR.