ISL32432EIUZ

Overview

The ISL32432EIUZ is a half-duplex transceiver supporting RS-422 and RS-485 protocols, manufactured by Renesas Electronics Corporation. It integrates one driver and one receiver within an 8-MSOP surface-mount package. The device operates on a supply voltage range of 3V to 5.5V with a maximum data rate of 250kbps. Key electrical specifications include a receiver hysteresis of 30mV for noise immunity and ±15V common mode rejection capability. It provides robust fault protection against ±40V overvoltages on the bus lines and withstands ±15kV electrostatic discharge strikes. The component functions reliably across an industrial temperature range of -40°C to +85°C.

Feature Summary

• Integrated ±40V fault protection on transmit and receive pins safeguards the device against high-voltage bus anomalies.
• Full fail-safe receiver design ensures a defined logic high output state when inputs are floating or shorted.
• ±15V common mode range exceeds standard RS-485 requirements, enabling operation in electrically noisy environments.

Applications

• Industrial automation networks requiring reliable serial communication under harsh electrical conditions
• Building automation systems utilizing RS-485 multi-drop configurations
• Metering infrastructure where fault protection prevents damage from line faults

Procurement Notes

Verify the specific suffix (e.g., EIUZ) matches the required package and temperature grade. Confirm RoHS compliance status aligns with project regulations. Check manufacturer datasheets for latest pinout and electrical characteristics before finalizing procurement. Ensure ordering quantities match available packaging formats such as tape and reel or tubes.

Selection Notes

Select this component when designing RS-485 or RS-422 interfaces requiring integrated overvoltage protection. The 250kbps speed suits moderate baud rate applications. Consider the 8-MSOP footprint for space-constrained PCB layouts. Verify that the ±40V protection level meets the specific fault tolerance requirements of the target bus topology.

Part Context

This part belongs to the ISL3243xE series of fault-protected transceivers. It shares functional similarities with models like ISL32437E but differs in package configuration and specific interface parameters. The series is designed for robust communication in industrial settings where bus line integrity is critical.

Replacement Considerations

ISL32437EIUZ is listed as a parameter-equivalent alternative. Verify pin compatibility and exact electrical tolerances before substitution. Other family members may offer different data rates or packages.