IL 485WE

Overview

The IL 485WE is a galvanically isolated, high-speed differential bus transceiver designed for bidirectional data communication on balanced transmission lines. It integrates RS-422 and RS-485 capabilities within a single component, utilizing NVE's IsoLoop® GMR technology. The device operates with a supply voltage range of 3V to 5.5V and supports data rates up to 35Mbps. It features a 16-SOIC package with a width of 7.50mm. Key electrical specifications include a 2500Vrms isolation voltage and a minimum common-mode transient immunity (CMTI) of 20kV/µs. The component ensures signal integrity in noisy industrial environments through internal DC processing.

Feature Summary

• Integrates RS-422 and RS-485 transceiver functions into a single galvanically isolated component
• Utilizes Giant Magnetoresistive (GMR) technology for low electromagnetic interference emission
• Provides bidirectional data communication capability on balanced transmission lines
• Features high common-mode transient immunity to maintain signal integrity in noisy environments

Applications

• Industrial automation systems requiring robust serial communication
• Power equipment monitoring and control interfaces
• Data acquisition systems with isolated sensor inputs
• Medical electronic devices needing galvanic isolation

Procurement Notes

Verify the specific suffix 'WE' against the manufacturer datasheet to confirm pinout and feature alignment. Confirm RoHS compliance status as historical records may vary. Check for obsolescence notices or lifecycle changes from NVE Corp. Ensure the 16-SOIC footprint matches the target PCB design. Validate that the 35Mbps rate meets system timing requirements.

Selection Notes

Select this component when both RS-422 and RS-485 protocols are required on a single isolated channel. The 20kV/µs CMTI rating makes it suitable for high-noise industrial settings. Consider the 16-SOIC package size for space-constrained designs. Verify that the 3V-5.5V supply range aligns with the system power architecture. Evaluate the 35Mbps speed against the maximum baud rate needed for the application.

Part Context

The IL 485WE belongs to NVE's IsoLoop® family of digital isolators. This series leverages proprietary GMR semiconductor materials manufactured in-house by NVE Corporation. The technology distinguishes itself by processing signals internally as DC, which minimizes self-generated EMC noise compared to capacitive or optical alternatives. This family is widely recognized for reliability in aerospace and critical industrial applications.

Replacement Considerations

No direct public substitute part numbers are confirmed for the IL 485WE in the provided documentation. Designers should consult NVE Corp for current portfolio updates or equivalent GMR-based solutions.