SI88621BD-IS

Overview

The SI88621BD-IS is a Skyworks Solutions digital isolator featuring two unidirectional channels with integrated DC-DC converter capability. 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 an isolation voltage of 5000 Vrms using capacitive coupling technology. Key electrical parameters include a propagation delay of 18 ns, rise and fall times of 2.5 ns, and a pulse width distortion of 4.5 ns. It functions reliably across a temperature range of -40°C to +125°C and is housed in a 20-SOIC package.

Feature Summary

• Integrates a high-voltage DC-DC converter for isolated power generation
• Utilizes capacitive coupling for robust signal transmission
• Supports high common-mode transient immunity

Applications

• Industrial automation systems requiring galvanic isolation
• Medical equipment with strict safety isolation standards
• Power electronics control circuits

Procurement Notes

Verify the specific suffix 'IS' against official Skyworks documentation to confirm package type and tape/reel specifications. Ensure compatibility with AEC-Q100 automotive qualification requirements if applicable to the target application. Cross-reference the manufacturer part number with authorized distributor databases to confirm current lifecycle status and availability constraints.

Selection Notes

Select this component when bidirectional isolation is not required and an integrated isolated power source is necessary. Compare performance metrics such as propagation delay and CMTI against non-integrated isolators to evaluate system latency and noise immunity. Consider the 20-SOIC footprint constraints during PCB layout design to ensure adequate clearance for the high-voltage isolation barrier.

Part Context

This part belongs to the Si8862x series of digital isolators from Skyworks Solutions. The series is designed for applications demanding high reliability and compact form factors. The SI88621 variant specifically integrates the DC-DC converter, distinguishing it from standard isolator variants that require external power management components on the isolated side.

Replacement Considerations

SI88621BC-ISR is listed as a substitute option by distributors.