SI88640BD-IS

Overview

The SI88640BD-IS is a Skyworks Solutions digital isolator featuring four unidirectional channels and an integrated DC-DC converter. It operates within a supply voltage range of 3 V to 5.5 V, providing 5000 Vrms isolation via capacitive coupling. The device supports data rates up to 100 Mb/s with a propagation delay of 18 ns. It functions reliably across a temperature range of -40 °C to +125 °C and is housed in a SOIC-20 surface-mount package.

Feature Summary

• Integrates four-channel digital isolation with a built-in isolated DC-DC power converter
• Provides high common-mode transient immunity through capacitive coupling technology
• Supports high-speed data transmission at rates up to 100 Mb/s

Applications

• Industrial automation systems requiring galvanic isolation
• Medical equipment needing high-voltage safety compliance
• Power electronics interfaces for motor control applications

Procurement Notes

Verify the specific suffix 'IS' corresponds to the tube packaging configuration as indicated in distributor catalogs. Confirm that the component status is acceptable for current designs, noting that similar Skyworks parts may carry NRND (Not Recommended for New Designs) status. Ensure the procurement source provides valid RoHS compliance documentation matching the manufacturer's specifications.

Selection Notes

Select this component when a single-chip solution combining signal isolation and isolated power generation is required. The four-channel capacity suits parallel data lines or multi-sensor interfaces. Verify that the 5000 Vrms insulation rating meets the safety standards of the target application environment compared to lower-rated alternatives.

Part Context

This part belongs to the Si88640 series of digital isolators from Skyworks Solutions. It is designed to replace traditional transformer-based isolation schemes by offering smaller form factors and higher reliability. The series typically includes variants with different channel counts and packaging options to suit diverse interface requirements.

Replacement Considerations

Direct substitutes include other Skyworks Si88640 family members such as SI88640EC-IS or SI88640BD-ASR, provided pinout and electrical parameters match. Cross-referencing datasheets is essential to ensure compatibility with existing PCB layouts and thermal management strategies.