ISL31485EIBZ-T7A

Overview

The ISL31485EIBZ-T7A is a half-duplex RS-485/RS-422 transceiver manufactured by Renesas Electronics Corporation. It operates on a single 4.5V to 5.5V supply with a typical quiescent current of 2.3mA and shutdown current of 10µA. The device supports data rates up to 250kbps and features ±60V fault protection on bus pins, an extended common mode range of ±25V, and high transient overvoltage tolerance of ±80V. It includes full fail-safe receiver design, hot-plug capability, and slew-rate limiting. Packaged in an 8-lead SOIC (M8.15) for industrial temperatures (-40°C to +85°C), it utilizes the -T7A suffix for tape and reel delivery.

Feature Summary

• Fault protected RS-485 bus pins withstand up to ±60V
• Extended common mode range of ±25V exceeds standard requirements
• Full fail-safe receiver ensures logic high output during open or shorted conditions
• Hot plug circuitry maintains 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 against manufacturer documentation to confirm package type and reel specifications. Confirm that the component meets RoHS compliance standards required for your assembly process. Ensure the thermal profile used during soldering aligns with the Pb-free reflow recommendations provided in the datasheet to maintain reliability.

Selection Notes

Select this component when designing half-duplex communication links requiring robust fault protection against high voltage transients. The extended common mode range makes it suitable for electrically noisy environments where standard RS-485 devices may fail. Verify that the 250kbps data rate meets system timing requirements and that the 8-lead SOIC package fits the available PCB footprint constraints.

Part Context

This part belongs to the ISL3149xE family of fault-protected differential transceivers designed to exceed RS-485 and RS-422 standards. While the base model number indicates the functional core, the suffixes define physical attributes such as the leaded plastic SOIC package and tape-and-reel packaging format. This family prioritizes ruggedness and noise immunity for demanding industrial applications.

Replacement Considerations

For exact replacements, consult the ISL32490E Series Datasheet as indicated in official documentation. Verify pin compatibility and electrical parameters before substituting other RS-485 transceivers from different manufacturers.