ISL31492EIRTZ-T

Overview

The ISL31492EIRTZ-T is a half-duplex, fault-protected RS-485/RS-422 transceiver manufactured by Renesas Electronics. It operates on a single 5V supply (4.5V to 5.5V) and supports data rates up to 250kbps with slew-rate limiting. The device features ±60V continuous fault protection and an extended common-mode range of ±25V. Key electrical parameters include a typical quiescent current of 2.3mA and shutdown current of 10µA. It provides full fail-safe receiver operation and hot-plug capability, ensuring outputs remain three-stated during power-up or power-down events.

Feature Summary

• Fault-protected bus pins withstand up to ±60V and transient pulses up to ±80V
• Extended common-mode voltage tolerance allows operation within ±25V range
• Full fail-safe receiver design ensures logic high output when inputs are floating, shorted, or idle
• Hot-plug circuitry maintains three-state outputs during system power transitions

Applications

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

Procurement Notes

Verify the specific package marking and date code against the manufacturer's ordering information to confirm authenticity. Ensure the component meets RoHS compliance requirements for lead-free processing. Confirm that the tape and reel specifications align with standard pick-and-place equipment capabilities before finalizing procurement orders.

Selection Notes

Select this model for applications requiring robust fault protection and extended common-mode voltage tolerance beyond standard RS-485 limits. The half-duplex configuration with integrated slew-rate limiting makes it suitable for noise-sensitive environments where electromagnetic interference reduction is critical. Verify that the 250kbps data rate meets the system timing requirements.

Part Context

This component belongs to the ISL3149xE series of differential transceivers designed to exceed RS-485 and RS-422 standards. The 'IRTZ' suffix indicates an 8-lead TDFN package with tape and reel packaging. The 'E' designation signifies enhanced fault protection features compared to non-E variants.

Replacement Considerations

For exact replacement, consult the ISL32490E Series datasheet as recommended by the manufacturer. Ensure any substitute maintains the same half-duplex topology, ±60V fault protection rating, and compatible pinout configuration.