ISL3171EIBZ-T

Overview

The ISL3171EIBZ-T is a single full-duplex RS-422/RS-485 transceiver manufactured by Renesas Electronics. It operates on a single 3V to 3.6V supply and supports data rates up to 250kbps. The device features ±15kV IEC61000 ESD protection on RS-485 I/O pins and >7kV HBM protection elsewhere. It incorporates a true 1/8 unit load, enabling up to 256 devices on the bus without repeaters. The receiver provides full fail-safe functionality for open, shorted, or floating inputs. Hot-plug circuitry maintains three-state outputs during power-up. It is housed in an 8-pin MSOP package and operates within a temperature range of -40°C to +85°C.

Feature Summary

• IEC61000-compliant ±15kV ESD protection on RS-485 differential I/O pins
• True 1/8 unit load architecture supporting high node density networks
• Full fail-safe receiver design ensuring defined logic states under fault conditions
• Hot-plug capability maintaining high-impedance outputs during power stabilization

Applications

• Remote utility meter reading systems requiring high node counts
• Industrial control networks utilizing RS-485 communication protocols
• Building automation systems with multiple sensor nodes

Procurement Notes

Verify the specific suffix 'EIBZ-T' against the manufacturer's current datasheet to confirm pinout compatibility and RoHS status. Ensure the ordering quantity aligns with standard reel sizes if applicable. Cross-reference the component marking code with official documentation to prevent counterfeit substitution. Confirm that the 8-MSOP package dimensions match the target PCB footprint requirements before finalizing procurement.

Selection Notes

Select this component when designing full-duplex RS-422 or RS-485 interfaces requiring robust ESD protection and low quiescent current. It is suitable for applications demanding high bus density due to its 1/8 unit load characteristic. Consider alternatives only if higher data rates exceeding 250kbps or half-duplex operation are required. Verify that the 3.3V supply voltage matches the system power rails.

Part Context

This part belongs to the ISL317xE series of low-power, high-speed RS-485/RS-422 transceivers from Renesas. The series includes variants with different driver slew rates and duplex configurations. The ISL3171EIBZ-T specifically denotes the full-duplex variant with slew-rate limited drivers to minimize EMI. It shares common electrical characteristics with other members of the family but differs in internal driver/receiver topology.

Replacement Considerations

Publicly confirmed substitutes include ISL3171EIUZ-T (MSOP package) and ISL3171EIBZ (tube packaging). Verify pin-to-pin compatibility and ensure the replacement maintains the same ESD protection levels and unit load specifications.