ISL31490EIBZ-T

Overview

The ISL31490EIBZ-T is a fault-protected, full-duplex RS-485/RS-422 transceiver manufactured by Renesas Electronics Corporation. It operates on a single 4.5V to 5.5V supply and supports data rates up to 250kbps with slew-rate limiting enabled. The device features ±60V bus pin fault protection and an extended common mode range of ±25V. It includes hot-plug circuitry, low quiescent current (2.3mA typical), and ultra-low shutdown current (10µA typical). Packaged in a 14-lead SOIC (M14.15) for industrial temperatures ranging from -40°C to +85°C.

Feature Summary

• Bus pins protected against faults up to ±60V
• Extended common mode voltage tolerance of ±25V
• Full fail-safe receiver design for open, shorted, or idle bus conditions
• Hot-plug capability keeping outputs three-state 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' indicates tape and reel packaging as per manufacturer tech brief TB347. Confirm that the 'IBZ' designation corresponds to the 14-lead SOIC package variant. Ensure RoHS compliance requirements are met for the intended manufacturing process.

Selection Notes

Select this component when designing full-duplex RS-485 or RS-422 interfaces requiring high noise immunity and robust fault protection. The 250kbps data rate and slew-rate limiting make it suitable for longer cable runs where signal integrity is critical. Verify that the 14-pin SOIC footprint aligns with the PCB layout constraints.

Part Context

This part belongs to the ISL3149xE family of differential transceivers designed to exceed standard RS-485 and RS-422 specifications. The 'ISL31490E' base model specifically denotes a full-duplex configuration with 250kbps speed capability. The 'IBZ' suffix identifies the physical package type, while 'T' specifies the bulk packaging format.

Replacement Considerations

Public confirmed substitute: ISL32490E Series.