ISL3178EIUZ

Overview

The ISL3178EIUZ is a single RS-422/RS-485 transceiver manufactured by Renesas Electronics Corporation. It operates on a single 3.3V supply and supports data rates up to 20 Mb/s. The device features ±15kV IEC61000 ESD protection and full fail-safe receiver inputs. It draws a maximum quiescent current of 800 µA and offers an ultra-low shutdown current of 10 nA. The component provides a true 1/8 unit load, allowing up to 256 devices on the bus. It functions within a temperature range of -40°C to +85°C and is housed in an MSOP-8 package.

Feature Summary

• IEC61000-compliant ±15kV ESD protection on RS-485 I/O pins
• Full fail-safe design ensuring logic high output when inputs are floating or shorted
• Hot plug capability maintaining three-state outputs during power-up
• True 1/8 unit load enabling 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 'E' for industrial temperature range and 'U' for MSOP-8 packaging against official Renesas documentation. Confirm RoHS compliance status through the manufacturer's current product status reports. Ensure the ordering part number matches the exact pinout and electrical specifications required for the target application circuit design.

Selection Notes

Select this component for applications requiring robust ESD protection and high noise immunity in balanced communication environments. The low quiescent current makes it suitable for battery-powered or energy-efficient systems. Verify that the 3.3V supply voltage aligns with the system architecture and that the MSOP-8 package fits the available PCB real estate constraints.

Part Context

This device belongs to the ISL317xE series of RS-485/RS-422 transceivers from Renesas. The series shares common features such as ±15kV ESD protection and 3.3V operation. Variants within the series differ primarily in duplex configuration (half vs. full) and driver slew rate characteristics. This specific model represents the half-duplex variant optimized for standard industrial communication protocols.

Replacement Considerations

Direct substitutes within the same family include ISL3172E and ISL3177E, which share similar electrical characteristics and pinouts. Verify compatibility regarding duplex mode and package dimensions before substitution. Cross-reference with other manufacturers' RS-485 transceivers only if pin-to-pin compatibility and electrical parameters are explicitly confirmed.