ISL3172EIBZ-T7A

Overview

The ISL3172EIBZ-T7A is a single RS-485/RS-422 transceiver from the Renesas ISL317xE series, designed for balanced communication networks. It operates on a single 3.0V 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 provides full fail-safe receiver functionality, ensuring a logic high output when inputs are floating, shorted, or undriven. The transceiver presents a true 1/8 unit load, allowing up to 256 devices on the bus. Key electrical parameters include a maximum quiescent current of 800µA and an ultra-low shutdown current of 10nA. It operates within a -7V to +12V common-mode voltage range and functions across a temperature range of -40°C to +85°C.

Feature Summary

• IEC61000 standard ESD protection on differential I/O pins with high robustness levels
• Full fail-safe receiver design maintains stable logic states during open, short, or floating bus conditions
• Hot-plug capability keeps transmitter and receiver outputs in a high-impedance state during power-up sequences
• Slew rate limited drivers reduce electromagnetic interference and minimize signal reflections

Applications

• Remote utility meter reading systems requiring high node density
• Industrial automation networks utilizing RS-485 or RS-422 protocols
• Building automation and control systems with multiple peripheral nodes

Procurement Notes

Verify the specific suffix 'T7A' indicates tape and reel packaging when sourcing components. Confirm that the 'E' designation in the base model number corresponds to the extended ESD protection specifications. Ensure compatibility with the required 3.3V logic levels and check for RoHS compliance documentation prior to integration into production assemblies.

Selection Notes

Select this component for applications requiring robust ESD protection and low power consumption in half-duplex configurations. The 1/8 unit load characteristic makes it suitable for large network topologies without repeaters. Consider the slew rate limited driver option if electromagnetic compatibility is a primary constraint compared to high-speed variants in the same family.

Part Context

This part belongs to the ISL317xE family of low-power, high-speed RS-485/RS-422 transceivers manufactured by Renesas Electronics. The family shares core architectural features such as fail-safe receivers and hot-plug protection, while varying in data rate capabilities and package options. The ISL3172 variant specifically targets applications where moderate data speeds and enhanced ESD immunity are prioritized over maximum throughput.

Replacement Considerations

Direct substitutes within the same product line include the ISL3172EIBZ in tube packaging. Other models in the ISL317xE series may offer different data rates or duplex configurations but share similar pinouts and functional characteristics.