SI88421BC-ISR

Digital Isolators Overview

The SI88421BC-ISR is a high-speed digital isolator from Skyworks Solutions, featuring two 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 via capacitive coupling technology. Key electrical parameters include a propagation delay of 18 ns, with rise and fall times of 2.5 ns each. It functions reliably across an extended temperature range from -40°C to +125°C. Packaged in a SOIC-Wide-16 format on a reel, it includes a shutdown feature for power management.

Digital Isolators Feature Summary

• Integrates a high-efficiency DC-DC converter to provide isolated power supply capability alongside signal isolation.
• Utilizes proprietary capacitive coupling technology to achieve robust 5000 Vrms insulation barrier.
• Features fail-safe output design to ensure defined logic states during fault conditions.

Digital Isolators Applications

• Industrial automation control systems requiring galvanic isolation
• Medical equipment needing high-voltage safety compliance
• Power electronics monitoring and gate drive circuits

Digital Isolators Procurement Notes

Verify the specific suffix 'BC-ISR' against official Skyworks documentation to confirm package type and tape/reel specifications. Check current lifecycle status as some variants may be marked NRND. Ensure compatibility with moisture sensitivity levels if storage conditions are critical. Confirm that the integrated DC-DC converter meets your isolated power requirements before finalizing procurement.

Digital Isolators Selection Notes

Select this component when both signal isolation and isolated power generation are required in a single package. Compare propagation delay and pulse width distortion against system timing constraints. Verify that the 100 Mb/s data rate suffices for the application bus speed. Consider the SOIC-Wide-16 footprint for PCB layout compatibility.

Digital Isolators Part Context

This part belongs to the Si884xx series of digital isolators designed for general-purpose applications. It combines channel isolation with power conversion, distinguishing it from standard isolator-only parts like the SI88420 series which lack the integrated converter. The family targets applications demanding compact solutions for high-voltage separation.

Digital Isolators Replacement Considerations

Public confirmed substitute part numbers: None available.