ISOW1412DFMR

Overview

The ISOW1412DFMR is a low-emissions, reinforced isolated RS-485/RS-422 transceiver manufactured by Texas Instruments. It integrates power supply capabilities within the isolation barrier. The device supports data rates up to 500 kbps and operates with a supply voltage range of 1.71 V to 5.5 V. It features a propagation delay of 450 ns and dissipates 1.06 W of power. The component is housed in a 20-pin SOIC package and functions as a half/full duplex transceiver. It provides ESD protection and includes a shutdown feature. The operating temperature range spans from -40°C to +125°C.

Feature Summary

• Integrates isolated DC-DC converter for power delivery across the isolation barrier
• Provides reinforced insulation for RS-485 and RS-422 communication interfaces
• Designed for low electromagnetic interference emissions during operation

Applications

• Industrial automation systems requiring galvanic isolation
• Medical equipment with safety isolation requirements
• Data acquisition systems with noisy ground environments

Procurement Notes

Verify the specific suffix 'DFMR' corresponds to the DFM (Dual Flat No-Lead) or SOIC variant as listed in official Texas Instruments documentation. Confirm RoHS compliance status and moisture sensitivity level before procurement. Ensure the ordering part number matches the exact package type and tape/reel specifications required for your assembly process. Cross-reference with the latest product change notifications for any manufacturing updates.

Selection Notes

Select this component when an integrated isolated power supply is needed alongside signal transmission for RS-485/RS-422 networks. It is suitable for applications demanding reinforced isolation ratings and low emission profiles. Consider the 500 kbps data rate limit and the 20-pin package constraints. Evaluate thermal performance given the 1.06 W power dissipation in the chosen enclosure environment.

Part Context

This part belongs to the ISOW1412 series of isolated transceivers from Texas Instruments. It is distinct from non-integrated isolators by including the power conversion circuitry on-chip. The DFMR suffix indicates a specific package configuration, typically associated with surface-mount technology. It serves as a complete solution for isolated serial communication without external magnetics.

Replacement Considerations

ISOW1412DFMR is a direct pin-compatible alternative to ISOW1412BDFMR within the same family. Verify that the replacement maintains the same low-emission characteristics and integrated power specifications. Check datasheet revisions to ensure functional equivalence regarding isolation voltage and data rate limits.