SI88321ED-ISR

Digital Isolators Overview

The SI88321ED-ISR is a Skyworks Solutions digital isolator featuring two unidirectional channels with an integrated DC-DC converter. It provides 5000 Vrms isolation voltage and supports data rates up to 100 Mb/s. The device operates within a supply voltage range of 3 V to 5.5 V, exhibiting typical propagation delays of 18 ns and common mode transient immunity of 40 kV/µs. Packaged in a 20-SOIC wide format, it utilizes capacitive coupling technology for signal transmission across the isolation barrier.

Digital Isolators Feature Summary

• Integrates a high-efficiency DC-DC converter to power isolated side circuits
• Provides robust capacitive coupling isolation for reliable signal transmission
• Supports high-speed data communication at rates up to 100 Mb/s
• Features dual-channel unidirectional configuration for versatile interface applications

Digital Isolators Applications

• Industrial automation systems requiring galvanic isolation
• Programmable logic controller (PLC) input/output modules
• Medical equipment needing safety-certified signal barriers
• Power electronics interfaces such as motor drives and inverters

Digital Isolators Procurement Notes

Verify the specific suffix 'ISR' to confirm the tape-and-reel packaging variant, distinct from the bulk 'ED' version. Confirm RoHS compliance status through official Skyworks documentation prior to integration. Check current lifecycle status, as some variants may carry 'Not Recommended for New Designs' warnings. Ensure thermal management aligns with SOIC-wide 20 package specifications during PCB layout.

Digital Isolators Selection Notes

Select this component when dual-channel isolation with integrated power conversion is required. Compare against single-channel alternatives if only one signal path is needed. Evaluate the 5000 Vrms rating against system insulation requirements. Consider the 100 Mb/s speed limit for application bandwidth needs. Verify that the 20-pin SOIC footprint matches existing board constraints.

Digital Isolators Part Context

Part of the ISOvolt family, the SI88321ED-ISR replaces traditional optocouplers in industrial designs. It offers higher reliability and lower power consumption compared to legacy solutions. The series emphasizes compactness and performance for modern embedded systems. Skyworks positions this device as a key solution for upgrading isolation architectures in cost-sensitive applications.

Digital Isolators Replacement Considerations

Direct substitutes include other SI8832x series devices with matching channel counts. Verify pinout compatibility before swapping with similar Skyworks models. Cross-reference technical parameters like CMTI and propagation delay to ensure functional equivalence in high-noise environments.