IL 3085-1E

Overview

The IL3085-1E is a galvanically isolated, high-speed differential bus transceiver designed for bidirectional data communication on balanced transmission lines. It utilizes Giant Magnetoresistive (GMR) technology to provide isolation between RS-422 and RS-485 networks. The device supports a data rate of 4Mbps with three unidirectional channels. It operates on 3V to 5.5V power supplies and offers 2500Vrms isolation voltage per UL 1577. Key electrical specifications include a common mode transient immunity of 50kV/μs typical and 7kV bus ESD protection.

Feature Summary

• Galvanic isolation using GMR technology for RS-422 and RS-485 applications
• High common mode transient immunity of 50kV/μs typical
• Fail-safe circuitry with power-up determined state
• Thermal shutdown protection for enhanced reliability

Applications

• Industrial communication networks requiring galvanic isolation
• Control systems interfacing with balanced transmission lines
• RS-485 bus systems supporting up to 32 nodes

Procurement Notes

Verify the specific package variant, as the IL3085 series includes QSOP, 0.15-inch SOIC, and 0.3-inch True 8mm 16-pin SOIC options. Confirm that the ordering suffix corresponds to the required thermal and mechanical specifications. Ensure compatibility with the target system's voltage levels and isolation requirements before procurement.

Selection Notes

Select this component for applications requiring low-cost, high-speed isolation on RS-485 buses. Consider the 4Mbps data rate and 3-channel unidirectional configuration. Evaluate the need for VDE V 0884-10 certification or UL 1577 recognition based on regional safety standards. Check temperature range requirements against the -40°C to +85°C specification.

Part Context

NVE Corporation manufactures spintronic sensors and isolators. The IL3085 series belongs to their digital isolator product line, leveraging GMR technology for robust signal transmission across isolation barriers. This family addresses the need for reliable communication in electrically noisy industrial environments.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify pinout and functional compatibility if considering alternative manufacturers' RS-485 isolators.

FAQ

What isolation technology does the IL3085-1E use?

It uses Giant Magnetoresistive (GMR) technology for galvanic isolation.

Does the IL3085-1E support bidirectional communication?

Yes, it is designed for bidirectional data communication on balanced transmission lines, though the internal channels are unidirectional.