SI88240BD-ISR

Overview

The SI88240BD-ISR is a Skyworks Solutions digital isolator featuring four unidirectional channels and an integrated DC-DC converter. It provides 5000 Vrms isolation via capacitive coupling with a data rate of 100 Mb/s. The device operates on a 3 V to 5.5 V supply, exhibits a propagation delay of 18 ns, and supports a maximum CMTI of 40 kV/µs. Packaged in a 20-SOIC (Wide) format, it functions within a temperature range of -40°C to +125°C.

Feature Summary

• Integrates a high-efficiency isolated DC-DC converter for power delivery across the isolation barrier
• Utilizes silicon-based capacitive coupling technology for robust signal transmission
• Provides high common-mode transient immunity to ensure reliable operation in noisy environments

Applications

• Industrial automation systems requiring galvanic isolation
• Programmable logic controller (PLC) input/output modules
• Inverter and motor drive control circuits
• Servo motor control interfaces

Procurement Notes

Verify the specific suffix 'ISR' to confirm reel packaging and tape-and-reel configuration. Ensure compatibility with the SOIC-Wide-20 footprint during PCB layout. Confirm that the 5000 Vrms isolation rating meets the safety requirements of the target application environment.

Selection Notes

Select this component when a single package solution combining multi-channel isolation and isolated power is required. Compare against non-integrated isolators to evaluate board space savings. Verify that the 100 Mb/s data rate aligns with system communication speeds and that the 18 ns delay fits timing constraints.

Part Context

This part belongs to the Si88xx ISOvolt family, designed to replace optocouplers in industrial applications. It offers higher reliability and lower power consumption compared to legacy technologies. The series integrates both signal isolation and power conversion capabilities into a compact form factor.

Replacement Considerations

The SI88240BD-IS is the tube-packaged equivalent of this reel-part. Other variants like SI88240BC-IS offer different isolation ratings. Check datasheets for pinout and electrical parameter compatibility before substitution.

FAQ

What is the maximum common-mode transient immunity (CMTI) rating?

The device supports a typical CMTI of 40 kV/µs.

Does this component include an isolated power supply?

Yes, it features an integrated DC-DC converter capable of delivering up to 2 W of isolated power.