SI88440ED-AS

Overview

The SI88440ED-AS is a quad digital isolator manufactured by Skyworks Solutions Inc., housed in a 20-SOIC package. It features four unidirectional channels with a data rate of 100 Mb/s and an insulation voltage of 5000 Vrms. The device operates on a supply voltage between 3 V and 5.5 V, drawing a maximum operating current of 13.3 mA. Propagation delay is specified at 18 ns, with a common-mode transient immunity of 40 kV/µs.

Feature Summary

• Integrates four independent digital isolation channels for signal transmission across electrical barriers
• Includes an integrated DC-DC converter to provide isolated power supplies for the secondary side
• Utilizes capacitive coupling technology to ensure high reliability and long-term stability
• Provides high common-mode transient immunity to maintain signal integrity in noisy environments

Applications

• Industrial automation systems requiring galvanic isolation
• Medical equipment needing certified safety isolation
• Power electronics control circuits
• Automotive electronic modules

Procurement Notes

Verify the specific suffix AS against official Skyworks documentation to confirm pinout and packaging details. Ensure compatibility with the required isolation voltage standards for your application. Check for RoHS compliance status as indicated in the manufacturer's datasheet. Confirm availability through authorized distributors as stock levels may vary.

Selection Notes

Select this component when four isolated channels are required alongside an integrated power source for the isolated side. Compare propagation delay and CMTI specifications against system timing requirements. Ensure the SOIC-20 footprint fits the PCB layout constraints. Verify that the 5000 Vrms isolation rating meets the safety regulations applicable to the target market.

Part Context

This part belongs to the Si88440 family of quad digital isolators from Skyworks Solutions. The series is designed for applications demanding high-speed data transfer and robust isolation. Other variants in the family may differ in channel count, polarity, or the presence of an integrated DC-DC converter.

Replacement Considerations

Check for SI88440ED-IS as a potential alternative within the same family. Verify if the IS variant offers different isolation certifications or performance metrics. Ensure pin-to-pin compatibility before substitution.