ISL31492EIRTZ-T7A

Overview

The ISL31492EIRTZ-T7A is a half-duplex, fault-protected RS-485/RS-422 transceiver manufactured by Renesas Electronics Corporation. It operates on a single 4.5V to 5.5V supply with a typical quiescent current of 2.3mA and supports data rates up to 250kbps. The device features ±60V bus pin protection and an extended common mode range of ±25V. It utilizes an 8-lead TDFN package (3x3mm) with an exposed thermal pad for surface mount assembly.

Feature Summary

• Integrated fault protection on driver outputs and receiver inputs handles voltages up to ±60V.
• Extended common mode voltage tolerance allows operation in environments with ±25V common mode signals.
• Full fail-safe receiver design ensures a logic high output when inputs are floating, shorted, or idle.
• Hot plug circuitry maintains three-state outputs during power-up and power-down sequences.

Applications

• Utility meters and automated meter reading systems
• High node count PROFIBUS and field bus networks
• Security camera networks
• Building lighting and environmental control systems

Procurement Notes

Verify the specific ordering suffix against official manufacturer documentation to confirm tape and reel packaging specifications. Confirm that the component meets RoHS compliance requirements and check for any product change notices regarding lead times or availability status before finalizing procurement plans.

Selection Notes

Select this component for designs requiring robust fault protection and wide common mode voltage tolerance. Ensure the application does not exceed the maximum junction temperature limits. Verify that the 8-lead TDFN package dimensions fit the available PCB space and that thermal management strategies account for the exposed pad connection.

Part Context

This part belongs to the ISL3149xE series of differential transceivers designed for balanced communication standards. The 'T7A' suffix indicates a specific tape and reel configuration for automated assembly. The device shares core electrical characteristics with other variants in the family, differing primarily in duplex configuration and data rate capabilities.

Replacement Considerations

Consult the ISL32490E Series datasheet for exact replacements if cable invert functionality is required. Verify pin compatibility and electrical parameters when substituting with other RS-485 transceivers from different manufacturers.