ISOW1432BDFMR

Overview

The ISOW1432BDFMR is a low-emissions, 5-kVrms isolated RS-485/RS-422 transceiver featuring an integrated DC/DC converter. It provides four channels with a data rate of 12 Mbps and typical common-mode transient immunity (CMTI) of 100 kV/µs. The device operates within a supply voltage range of 1.71 V to 5.5 V and supports propagation delays up to 610 ns. Packaged in a 20-SOIC format, it functions across temperatures from -40°C to 125°C.

Feature Summary

• Integrates a high-performance DC/DC converter for isolated power delivery
• Provides robust signal isolation with 5-kVrms reinforced rating
• Features low electromagnetic interference emissions design
• Delivers high-speed data transmission at 12 Mbps

Applications

• Industrial automation control systems
• Factory floor sensor networks
• Building automation interfaces
• Energy metering equipment

Procurement Notes

Verify the specific suffix 'B' against the official Texas Instruments datasheet to confirm pinout or electrical parameter variations compared to standard variants. Ensure the SOIC-20 package dimensions match the PCB footprint requirements. Confirm RoHS compliance status for the specific manufacturing lot before integration into regulated assemblies.

Selection Notes

Select this component when a single-chip solution combining isolation and power conversion is required for RS-485/RS-422 links. It is suitable for designs needing 5-kVrms isolation without external magnetic components. Consider the 12 Mbps speed and CMTI ratings relative to the noise environment of the target application.

Part Context

This part belongs to the ISOW14x2 family of isolated transceivers from Texas Instruments. These devices utilize capacitive coupling technology to provide galvanic isolation. The series is designed to simplify system architecture by integrating the isolated power supply directly onto the chip, reducing board space and component count.

Replacement Considerations

ISOW1432DFMR is documented as a parameter-equivalent alternative.