ISL31491EIBZ-T

Overview

The ISL31491EIBZ-T is a half-duplex RS-485/RS-422 transceiver manufactured by Renesas Electronics. It operates on a single 5V supply and supports data rates up to 250kbps. The device features ±60V fault protection on bus pins and an extended common mode range of ±25V. It includes hot plug circuitry that keeps outputs in a high-impedance state during power-up or power-down. The component is housed in an 8-lead SOIC package and functions within a temperature range of -40°C to +85°C.

Feature Summary

• Integrated fault protection for RS-485 bus pins against voltages up to ±60V
• Extended common mode voltage tolerance exceeding standard RS-485 requirements
• Hot plug functionality ensuring three-state outputs during power transitions

Applications

• Utility meters and automated meter reading systems
• PROFIBUS and field bus networks
• Security camera networks
• Industrial process control networks

Procurement Notes

Verify the specific ordering suffix '-T' corresponds to tape and reel packaging as defined in manufacturer technical briefs. Confirm RoHS compliance status and moisture sensitivity level classifications prior to procurement. Ensure the selected variant matches the required half-duplex configuration and thermal specifications for the target application environment.

Selection Notes

Select this model when a half-duplex interface with 250kbps maximum data rate is required. The ISL31491E lacks shutdown capability compared to other family members, making it suitable for always-on applications. Verify that the 8-pin SOIC package meets the board layout constraints and that the ±60V protection aligns with the system's fault voltage expectations.

Part Context

This component belongs to the ISL3149xE series of fault-protected differential transceivers. It shares core electrical characteristics with variants like the ISL31490E and ISL31492E but differs in pinout configuration and duplex operation. The series is designed to exceed RS-485 standards for robustness in electrically noisy industrial environments.

Replacement Considerations

Public confirmed substitute part numbers: ISL31490E, ISL31492E.