ISOW1432DFMR

Overview

The ISOW1432DFMR 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 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 (0.295 inch width) surface-mount format, it functions reliably across an industrial temperature range of -40°C to +125°C.

Feature Summary

• Integrates a magnetic coupling-based DC/DC converter for isolated power delivery
• Supports RS-422 and RS-485 communication protocols
• Provides high common-mode transient immunity for noisy environments

Applications

• Industrial automation control systems
• Factory floor sensor networks
• Building automation interfaces

Procurement Notes

Verify the specific suffix 'DFMR' against the manufacturer's current datasheet to confirm package dimensions and tape-and-reel specifications. Ensure the design accounts for the integrated DC/DC converter requirements, including external capacitor placement as defined in the official electrical characteristics section.

Selection Notes

Select this component when a single-chip solution for isolated RS-485/RS-422 communication is required. The integrated power converter eliminates the need for separate isolated power supplies. Confirm that the 12 Mbps data rate and 5-kVrms isolation rating meet the system's noise immunity and speed requirements.

Part Context

This part belongs to the ISOW14x2 family of digital isolators from Texas Instruments. These devices utilize capacitive or magnetic coupling technology to provide galvanic isolation between circuit sections while transmitting data signals. The series is designed for robust performance in electrically noisy industrial environments.

Replacement Considerations

ISOW1432BDFMR is documented as a parameter-equivalent alternative.