IL 3185E

Overview

The IL3185E is a digital isolator from NVE Corp/Isolation Products designed for RS422 and RS485 communication interfaces. It features two channels with a data rate of 5 Mbps and an isolation voltage of 2500Vrms. The device utilizes GMR technology and operates on a single supply voltage of 3.3V or 5.5V. It provides a common-mode transient immunity (CMTI) of 15 kV/µs and is housed in a 16-SOIC package.

Feature Summary

• Optimized for RS422 and RS485 serial communication protocols
• High common-mode transient immunity for noisy environments
• Giant magnetoresistive sensor technology for signal transmission

Applications

• RS422 interface isolation
• RS485 bus isolation
• Industrial control systems requiring galvanic isolation

Procurement Notes

Verify the specific suffix 'E' to confirm RoHS compliance and lead-free status. Ensure the 16-SOIC package width matches the PCB footprint requirements. Confirm that the 5 Mbps data rate meets the system's timing constraints. Check for any specific ordering suffixes that may indicate tape-and-reel packaging versus tube quantities.

Selection Notes

Select this component when RS422 or RS485 compatibility is required alongside moderate isolation voltage levels. The 15 kV/µs CMTI rating makes it suitable for industrial applications with significant electrical noise. Consider the 16-pin SOIC package for surface-mount assembly needs. Verify power supply voltage ranges align with the 3.3V or 5.5V operation specifications.

Part Context

The IL3185E belongs to the IsoLoop family of digital isolators from NVE. These devices use giant magnetoresistive sensors instead of traditional capacitive or optical isolation methods. This technology offers high reliability and immunity to electromagnetic interference, distinguishing it from other isolator types in the market.

Replacement Considerations

Check datasheets for alternative RS422/RS485 isolators with similar 2500Vrms isolation and 5 Mbps speed. Verify pinout compatibility if substituting directly into existing designs. Ensure the replacement supports the same 3.3V/5.5V supply voltages and 16-SOIC package form factor.