SI88240EC-ISR

Overview

The SI88240EC-ISR is a general-purpose digital isolator from Skyworks Solutions, featuring four unidirectional channels in a 20-SOIC package. It operates on a supply voltage range of 3 V to 5.5 V and supports data rates up to 100 Mb/s. The device provides an insulation voltage of 5000 Vrms with a typical common-mode transient immunity of 40 kV/µs. Key timing parameters include a propagation delay of 18 ns, rise/fall times of 2.5 ns, and pulse width distortion of 4.5 ns. It functions within a temperature range of -40°C to +125°C.

Feature Summary

• Four-channel unidirectional digital isolation
• Integrated high-frequency isolated DC-DC converter
• High common-mode transient immunity

Applications

• Industrial automation systems
• Power electronics interfaces
• General-purpose signal isolation

Procurement Notes

Verify the specific suffix 'ISR' against official Skyworks documentation to confirm tape-and-reel packaging and moisture sensitivity classification. Ensure the selected variant matches the required operating temperature range and voltage specifications for the target application environment before finalizing procurement.

Selection Notes

Select this component when four independent unidirectional signal paths are required alongside integrated power isolation. The 20-SOIC package offers a compact footprint suitable for space-constrained designs. Consider the 100 Mb/s data rate and 18 ns latency for timing-sensitive applications requiring robust noise rejection capabilities.

Part Context

This part belongs to the Si8824x series of ISOvolt digital isolators. These devices integrate capacitive coupling technology with an internal isolated DC-DC converter, eliminating the need for external bias supplies on the isolated side. This integration reduces system complexity and board space compared to traditional discrete isolation solutions.

Replacement Considerations

Check Skyworks documentation for direct pin-compatible alternatives within the Si8824x family. Verify that any substitute maintains the same 5000 Vrms insulation rating and 4-channel configuration to ensure functional equivalence in existing circuit layouts.