ISL3171EIBZ

Overview

The ISL3171EIBZ is a 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 on other pins. 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 lines. Operating temperature ranges from -40°C to +85°C in an 8-pin SOIC package.

Feature Summary

• Full fail-safe receiver design ensures logic high output when inputs are undriven, shorted, or terminated but floating.
• Hot plug circuitry maintains three-state outputs during power-up to prevent bus contention.
• True 1/8 unit load architecture allows connection of up to 256 nodes on a single RS-485 network.

Applications

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

Procurement Notes

Verify the manufacturer part number ISL3171EIBZ against official Renesas documentation to confirm the specific SOIC-8 package variant. Ensure compatibility with system voltage requirements of 3V to 3.6V. Check for RoHS compliance status as indicated in current datasheets. Confirm lead-free specifications if required by assembly processes. Validate that the component meets the necessary ESD protection standards for the intended deployment environment.

Selection Notes

Select this component for applications requiring full-duplex communication over RS-422 or RS-485 buses. It is suitable for environments needing robust ESD protection and fail-safe operation. Consider the 250kbps data rate limit when designing high-speed networks. The 1/8 unit load feature makes it ideal for dense multi-drop configurations. Verify thermal performance within the specified operating temperature range.

Part Context

This device belongs to the ISL317xE series of low-power, high-speed transceivers. The series includes variants with different duplex modes and data rate capabilities. The ISL3171EIBZ specifically denotes the full-duplex version in an SOIC package. Other family members may offer half-duplex options or slew-rate limited drivers for reduced EMI.

Replacement Considerations

Direct substitutes include other ISL3171E variants with compatible packages. Cross-reference with RS-485/RS-422 transceivers offering similar pinouts and electrical characteristics. Verify functional equivalence regarding unit load and ESD ratings before substitution.