SI88440BD-IS

Digital Isolators Overview

The SI88440BD-IS is a general-purpose digital isolator featuring four unidirectional channels with an integrated DC-DC converter. It provides galvanic isolation of 5000 Vrms using capacitive coupling technology. The device supports data rates up to 100 Mb/s with a propagation delay of 18 ns and common mode transient immunity of 40 kV/µs. It operates within a supply voltage range of 3 V to 5.5 V and functions across a temperature range of -40°C to +125°C. Packaged in a 20-SOIC (7.50 mm width) surface-mount package, it is designed for robust signal transmission between circuits at different voltage levels.

Digital Isolators Feature Summary

• Integrates four isolated channels with a built-in DC-DC converter for power generation on the isolated side
• Provides high-voltage galvanic isolation via capacitive coupling technology
• Delivers high-speed data transmission with low propagation delay and jitter
• Features high common-mode transient immunity for reliable operation in noisy environments

Digital Isolators Applications

• Industrial automation systems requiring isolated communication interfaces
• Power electronics control circuits with high-voltage isolation needs
• Medical equipment requiring safe patient isolation barriers
• Test and measurement instruments needing precise signal isolation

Digital Isolators Procurement Notes

Verify the specific suffix 'IS' corresponds to the tape-and-reel packaging variant if required by automated assembly processes, as other suffixes may indicate tube packaging. Confirm that the 5000 Vrms isolation rating meets the safety standards applicable to your target application region. Ensure the SOIC-20 footprint dimensions align with your PCB layout constraints. Check for any recent lifecycle status updates from Skyworks Solutions Inc., as this component may be subject to design-in restrictions or end-of-life notices.

Digital Isolators Selection Notes

Select the SI88440BD-IS when four-channel unidirectional isolation is required alongside integrated power conversion. This part is suitable for applications demanding high common-mode transient immunity and wide operating temperature ranges. Consider alternative parts from the Si884xx series if bidirectional channels or lower isolation voltages are sufficient. Verify that the 100 Mb/s data rate meets the bandwidth requirements of the specific communication protocol being implemented.

Digital Isolators Part Context

This component belongs to the Si884xx family of digital isolators from Skyworks Solutions Inc. The family utilizes proprietary iCoupler technology for capacitive isolation. Variants within the family differ primarily in channel count, polarity (unidirectional vs. bidirectional), and isolation voltage ratings. The SI88440BD-IS specifically represents the four-channel unidirectional configuration with maximum isolation voltage in this series.

Digital Isolators Replacement Considerations

Publicly confirmed parametric equivalents include the SI88440EC-IS, which offers similar functionality but with a 3750 Vrms isolation rating and AEC-Q100 automotive qualification. Other variants in the same package may include SI88440BC-IS or SI88440BD-AS, though these may differ in packaging type or specific electrical characteristics.