ISL3173EIUZ

Overview

The ISL3173EIUZ 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 500 kb/s. The device features ±15kV IEC61000 ESD protection and full fail-safe receiver inputs that ensure a logic high output when inputs are floating, shorted, or undriven. It utilizes a true 1/8 unit load design, allowing up to 256 devices on the bus. The component includes hot-plug circuitry for three-state outputs during power-up and offers current limiting with thermal shutdown for driver overload protection. It is housed in an MSOP-8 package and operates within a temperature range of -40°C to +85°C.

Feature Summary

• Full fail-safe receiver design ensures defined logic states under open, shorted, or terminated conditions
• Hot-plug capability maintains high-impedance state for Tx and Rx outputs during power stabilization
• Integrated overcurrent and thermal shutdown mechanisms protect the driver from overload conditions

Applications

• Automated utility meter reading systems requiring high node counts
• Field bus networks with multidrop configurations
• Building environmental control systems

Procurement Notes

Verify the specific suffix 'UIZ' against official Renesas documentation to confirm the MSOP-8 package type and tape-and-reel shipping configuration. Ensure compatibility with 3.3V logic levels and check for RoHS compliance status in the latest datasheet revision before finalizing procurement orders.

Selection Notes

Select this component for applications requiring half-duplex communication with robust ESD protection. The 500 kb/s speed suits moderate-rate industrial networks. Verify that the 1/8 unit load requirement aligns with the total network node count to maximize bus capacity without repeaters.

Part Context

This part belongs to the ISL317xE family of low-power, high-speed RS-485/RS-422 transceivers. The family shares common features like ±15kV ESD protection and fail-safe designs but varies in data rate capabilities and package options. This specific model represents the slew-rate limited variant optimized for reduced EMI in noisy environments.

Replacement Considerations

Direct substitutes within the same family include ISL3173EIBZ-T (SOIC-14 package) for pin-compatible board space adjustments. Cross-family replacements require verification of voltage levels, data rates, and package dimensions.