ISL3178EIBZ-T

Overview

The ISL3178EIBZ-T is a single RS-485/RS-422 transceiver manufactured by Renesas Electronics. It operates on a single 3.3V supply and supports data rates up to 20 Mb/s. The device features ±15kV IEC61000 ESD protection on the bus pins and >7kV HBM protection elsewhere. It provides full fail-safe receiver functionality, ensuring a logic high output when inputs are floating or shorted. The transceiver draws a maximum quiescent current of 800µA and offers ultra-low shutdown current of 10nA. It utilizes a true 1/8 unit load design, allowing up to 256 devices on the bus. The component is housed in an SOIC-8 package and operates within a temperature range of -40°C to +85°C.

Feature Summary

• IEC61000 ESD protection on RS-485 I/O pins with ±15kV Class 3 level
• Full fail-safe receiver design for open, short, or terminated/floating conditions
• True 1/8 unit load capability supporting up to 256 nodes without repeaters
• Hot plug circuitry maintaining three-state outputs during power-up

Applications

• Remote utility meter reading systems requiring high node counts
• Industrial automation networks utilizing RS-485/RS-422 standards
• Building automation and control systems

Procurement Notes

Verify the specific suffix 'T' indicates reel packaging when ordering. Confirm RoHS compliance status through official datasheets as regulatory requirements may vary by region. Ensure the procurement channel sources directly from authorized distributors to guarantee authenticity. Check for moisture sensitivity levels if storage conditions exceed specified limits prior to assembly.

Selection Notes

Select this component for designs requiring high-speed communication up to 20 Mb/s with robust ESD protection. The low quiescent current makes it suitable for power-sensitive applications. Verify that the system voltage aligns with the 3.3V requirement. Consider the thermal shutdown and current limiting features for driver overload protection in harsh environments.

Part Context

This part belongs to the ISL317xE series of low-power, high-speed RS-485/RS-422 transceivers. The series includes variants with slew-rate limited drivers to reduce EMI. The ISL3178EIBZ-T specifically denotes the half-duplex version with standard drive capabilities in an SOIC-8 package.

Replacement Considerations

Direct substitutes include other parts within the ISL317xE family such as ISL3172EIBZ or ISL3175EIBZ, depending on required duplex mode and driver characteristics. Verify pin compatibility and electrical specifications before substitution.