ISL31492EIRTZ

Overview

The ISL31492EIRTZ is a half-duplex RS-485/RS-422 differential transceiver manufactured by Renesas Electronics Corporation. It operates within a supply voltage range of 4.5V to 5.5V and supports data rates up to 250kbps. The device features fault protection on bus pins up to ±60V and an extended common mode voltage range of ±25V. It utilizes an 8-pin TDFN (3x3mm) package with an exposed thermal pad, suitable for surface mount applications across a temperature range of -40°C to +85°C.

Feature Summary

• Fault protected RS-485 bus pins withstand up to ±60V
• Extended common mode range allows operation with voltages up to ±25V
• Full fail-safe receiver design ensures logic high output when inputs are floating or shorted
• Hot plug circuitry maintains three-state outputs during power-up and power-down

Applications

• Utility meters and automated meter reading systems
• PROFIBUS and field bus networks in factory automation
• Security camera networks
• Building lighting and environmental control systems
• Industrial and process control networks

Procurement Notes

Verify the component status as discontinued before procurement planning. Confirm the specific ordering suffix matches the required tape and reel specifications if applicable. Ensure the package type aligns with the manufacturing process requirements. Cross-reference the datasheet revision to confirm all electrical parameters meet current design needs.

Selection Notes

Select this component for designs requiring robust fault protection and wide common mode voltage tolerance. The half-duplex configuration is suitable for multiplexed communication lines. Verify that the 250kbps data rate meets system timing requirements. Ensure the 8-TDFN package dimensions fit the available PCB real estate constraints.

Part Context

This part belongs to the ISL3149xE family of fault-protected, 5V powered differential transceivers. It shares core architectural features with other variants like the ISL31490E and ISL31491E but differs in duplex configuration and pin count. The family is designed to exceed standard RS-485 and RS-422 requirements for noise immunity and ruggedness.

Replacement Considerations

Public documentation indicates the ISL32490E series as a recommended replacement for new designs. Verify pin compatibility and electrical parameter equivalence before substitution.