SI88240ED-ASR

Overview

The SI88240ED-ASR is a unidirectional digital isolator featuring four forward channels and zero reverse channels, housed in a 20-pin SOIC package. It operates on a supply voltage range of 3 V to 5.5 V with a maximum of 5.5 V. The device supports a data rate of 100 Mb/s and provides 5000 Vrms isolation voltage. Key timing parameters include a propagation delay of 18 ns, rise and 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 without a shutdown feature.

Feature Summary

• Integrates a fully-integrated secondary sensing feedback-controlled dc-dc converter for high-speed isolation
• Utilizes capacitive coupling technology for signal transmission across the isolation barrier
• Provides unidirectional data flow with four independent input channels

Applications

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

Procurement Notes

Verify the specific suffix (ED-ASR) against official Skyworks documentation to confirm pinout and thermal characteristics. Ensure compatibility with the required operating temperature range and supply voltage specifications. Confirm moisture sensitivity level handling procedures during assembly. Cross-reference the datasheet revision date to ensure all electrical parameters match current design requirements.

Selection Notes

Select this component when unidirectional isolation with integrated power conversion is required. The 20-pin SOIC package suits surface mount applications. Verify that the 100 Mb/s data rate meets system bandwidth needs. Ensure the 5000 Vrms isolation rating aligns with safety standards. Check if the absence of a shutdown pin fits the power management strategy.

Part Context

This part belongs to the Si88240 series of digital isolators from Skyworks Solutions. These devices are designed for robust performance in noisy environments. The series typically includes variants with different channel counts and packages. The SI88240ED-ASR specifically offers four-channel unidirectional isolation with an integrated DC-DC converter.

Replacement Considerations

Check Skyworks documentation for direct pin-to-pin replacements within the Si88240 family. Verify equivalent isolation ratings and data rates for alternative parts. Ensure any substitute maintains the same package footprint and thermal performance.