ISL3172EIUZ-T

Overview

The ISL3172EIUZ-T is a half-duplex RS-485/RS-422 transceiver manufactured by Renesas Electronics. It operates on a single 3.3V supply and supports data rates up to 250 kb/s. The device features ±15kV IEC61000 ESD protection, full fail-safe receivers, and hot-plug capability. It presents a true 1/8 unit load, allowing up to 256 devices on the bus. Operating temperature ranges from -40°C to +85°C. Quiescent current is 800µA maximum. It is housed in an MSOP-8 package.

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 floating inputs
• Hot-plug circuitry maintains high-impedance state during power-up
• True 1/8 unit load enables high node count networks without repeaters

Applications

• Remote utility meter reading systems
• High node count field bus networks
• Security camera networks
• Building environmental control systems

Procurement Notes

Verify the specific suffix 'UIZ' corresponds to the MSOP-8 package variant when sourcing. Confirm RoHS compliance status through official manufacturer documentation. Ensure the component meets the required operating temperature range of -40°C to +85°C for the intended application environment. Cross-reference the datasheet revision to confirm pinout compatibility.

Selection Notes

Select this model for applications requiring low power consumption and robust ESD protection in noisy environments. The half-duplex configuration suits bidirectional communication needs. Verify that the 250 kb/s data rate aligns with system requirements. Consider the MSOP-8 package size constraints against available PCB real estate.

Part Context

This component belongs to the ISL317xE series of transceivers designed for balanced communication standards. The series includes both slew-rate limited and high-speed variants. The ISL3172EIBZ is the SOIC-8 equivalent package version within the same functional family.

Replacement Considerations

ISL3172EIBZ-T (SOIC-8 package)

FAQ

What is the maximum number of devices supported on the bus?

Up to 256 transceivers can be connected due to the true 1/8 unit load characteristic.

How does the device handle hot-plugging?

Tx and Rx outputs remain in a high-impedance state while the power supply stabilizes.

What ESD protection levels are provided?

It offers ±15kV IEC61000 ESD protection on RS-485 I/O pins and >7kV HBM on other pins.