IL 3685E

Overview

The IL3685E is a digital isolator from NVE Corp/Isolation Products, designed for RS422 and RS485 communication interfaces. It features three channels with a data rate of 40 Mbps and a voltage isolation rating of 2500 Vrms. The device offers a common-mode transient immunity (CMTI) of 30 kV/µs. It operates within a supply voltage range of 3V to 5.5V and supports an operating temperature range of -40°C to 85°C. The component is housed in a 16-SOIC package.

Feature Summary

• Provides galvanic isolation for RS422 and RS485 serial communication lines
• Features high common-mode transient immunity for noise rejection
• Supports standard logic supply voltages without requiring isolated power domains

Applications

• RS422 and RS485 bus interface isolation
• Industrial automation control systems
• Measurement and testing equipment signal isolation

Procurement Notes

Verify the specific suffix 'E' against the manufacturer's current datasheet to confirm pinout compatibility and RoHS status. Ensure the selected distributor provides original components with traceable documentation. Cross-reference the 16-SOIC package dimensions with your PCB footprint requirements before finalizing procurement orders.

Selection Notes

Select this component when isolating differential serial communication lines is required. It is suitable for applications needing moderate data rates up to 40 Mbps. Consider the 2500 Vrms isolation barrier for basic protection needs. Evaluate the 16-SOIC package size against available board space constraints during the design phase.

Part Context

This part belongs to the NVE digital isolator family, utilizing magnetic sensing technology for signal transmission. It serves as an alternative to optical isolators in industrial environments. The IL series focuses on providing reliable isolation for standard communication protocols like RS485.

Replacement Considerations

Check for direct substitutes within the IL368x series or other NVE digital isolators with similar channel counts and isolation ratings. Verify that any replacement maintains the same 16-SOIC package and pin configuration to ensure mechanical compatibility.