IL 3685-3E

Overview

The IL 3685-3E is a digital isolator from NVE Corp/Isolation Products, designed for RS-422 and RS-485 communication applications. It features three channels with an isolation voltage of 2500Vrms. The device supports data rates up to 40 Mbps and operates on 3 V to 5 V power supplies. Key electrical parameters include a maximum propagation delay of 20 ns and hot-plug capability. It is housed in a 16-SOIC package.

Feature Summary

• Supports RS-422 and RS-485 communication protocols
• Provides robust galvanic isolation between circuits
• Capable of handling hot-plug events without damage

Applications

• Industrial automation systems requiring isolated serial communication
• Motor control cabinets with high-noise environments
• Embedded communication interfaces needing protocol compliance

Procurement Notes

Verify the specific suffix '-3E' against official NVE documentation to confirm pinout and functional compatibility. Ensure the procurement source provides valid datasheets matching the 16-SOIC package and 2500Vrms isolation rating. Cross-reference part numbers to avoid confusion with similar models like IL 3685 or IL 261 series components.

Selection Notes

Select this component when RS-422/RS-485 isolation is required with moderate data rates up to 40 Mbps. Consider the 20 ns propagation delay for timing-sensitive applications. Verify that the 3 V to 5 V supply range matches the system design. Ensure the 16-SOIC footprint fits the PCB layout constraints.

Part Context

This part belongs to the NVE digital isolator family, specifically tailored for differential line drivers. It integrates isolation technology with transceiver functionality, simplifying design by combining isolation and signal conversion in a single package. It serves as a bridge between low-voltage logic and noisy industrial bus lines.

Replacement Considerations

Check for direct substitutes within the IL 3685 series, such as IL 3685-1E or IL 3685-3E variants, ensuring channel count and package match. Verify compatibility with existing firmware and hardware interfaces before substitution.