ISL31491EIBZ-T7A

Overview

The ISL31491EIBZ-T7A is a half-duplex RS-485 transceiver manufactured by Renesas Electronics. It integrates one driver and one receiver in an SOIC-8 package, supporting data rates up to 250 kb/s. The device operates on a single 5 V supply with a typical quiescent current of 2.3 mA. It functions within an industrial temperature range from -40°C to +85°C. The component includes overvoltage protection on the bus pins and features fail-safe circuitry to ensure a high logic state when the differential input is open.

Feature Summary

• Integrated overvoltage protection on transmit and receive pins
• Fail-safe design ensures defined output states during idle conditions
• Low power consumption suitable for battery-operated systems
• Compliant with RS-485 and RS-422 communication standards

Applications

• Industrial automation control networks
• Building automation and security systems
• Metering infrastructure communication
• Point-to-point multi-drop serial communication links

Procurement Notes

Verify the specific suffix T7A confirms the tape-and-reel packaging format required for automated assembly processes. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Check for end-of-life notifications as discontinuation may impact long-term supply chain stability.

Selection Notes

Select this component for applications requiring robust overvoltage protection and low standby current. Ensure the system data rate does not exceed 250 kb/s. Verify that the 5 V supply voltage aligns with the target board power rails. Consider the SOIC-8 package dimensions for PCB layout constraints.

Part Context

This part belongs to the ISL31491E series of RS-485 transceivers. It shares functional similarities with other half-duplex devices but is distinguished by its specific 250 kb/s speed rating and integrated overvoltage protection capabilities. The series targets cost-sensitive industrial interfaces requiring reliable noise immunity.

Replacement Considerations

The ISL31491EIBZ is the tube-packaged equivalent of this reel-part. Verify pin compatibility and electrical specifications before substituting with other RS-485 transceivers from different manufacturers.