IL 3285-3E

Overview

The IL 3285-3E is a galvanically isolated RS-422/RS-485 digital isolator manufactured by NVE Corp. It features two channels with a 2500Vrms isolation voltage and 15kV/µs common-mode transient immunity. The device supports data rates up to 5Mbps, operates on a 3V to 5.5V supply, and functions within a -40°C to 85°C temperature range. Packaged in a 16-SOIC (0.154", 3.90mm width) surface-mount housing, it provides bidirectional communication over balanced transmission lines.

Feature Summary

• Galvanic isolation for RS-422 and RS-485 differential bus communication
• Fractional load capability allowing passive input termination
• High common-mode transient immunity for noise rejection
• Direct compatibility with 3V input supplies

Applications

• Industrial automation control systems
• Isolated serial communication interfaces
• Smart metering and utility infrastructure
• Medical equipment signal isolation

Procurement Notes

Verify the specific suffix '3E' against the manufacturer's official datasheet to confirm pinout and electrical characteristics match your design requirements. Ensure the selected package variant aligns with your PCB footprint specifications. Cross-reference RoHS compliance status with current regulatory standards before finalizing procurement orders.

Selection Notes

Select this component when designing isolated RS-422 or RS-485 networks requiring bidirectional data transfer. It is suitable for applications needing direct interface with microcontrollers without additional level shifting. Consider its fractional load feature for simplified circuit designs using passive terminations. Verify that the 5Mbps data rate meets your system's throughput requirements.

Part Context

This part belongs to the IL3285 series of isolated transceivers from NVE. These devices integrate isolation barriers directly into the transceiver architecture, replacing traditional discrete isolator and driver combinations. The series is designed to simplify board layout and reduce component count in high-noise industrial environments.

Replacement Considerations

Check for IL3285 variants with different isolation ratings or package widths if space constraints differ. Verify functional equivalence for RS-422/RS-485 protocols before substitution.