ISOW7743DFMR

Overview

The ISOW7743DFMR is a quad-channel digital isolator from Texas Instruments, housed in a 20-SOIC package. It supports a data rate of 100 Mb/s with unidirectional signal paths and features galvanic isolation rated at 5000 Vrms. The device includes an integrated DC-DC converter and operates within a supply voltage range of 2.97 V to 5.5 V. Key electrical parameters include a propagation delay of 10.7 ns, rise time of 3.6 ns, fall time of 3.5 ns, and pulse width distortion of 5.8 ns. It functions reliably across a temperature range of -40°C to +125°C.

Feature Summary

• Integrated low-emissions DC-DC converter designed for low-noise operation
• High common-mode transient immunity capability
• Independent power supply architecture for isolated channels

Applications

• Industrial automation systems requiring high-speed isolation
• Medical equipment needing reliable galvanic separation
• Power electronics control circuits

Procurement Notes

Verify the specific suffix 'DFMR' corresponds to the SOIC-20 package and reel/cut-tape packaging configuration. Confirm that the component meets RoHS standards and check humidity sensitivity levels prior to storage and soldering processes. Ensure the ordering part number matches the exact datasheet specifications for the ISOW7743 series.

Selection Notes

Select this component when four independent unidirectional channels are required alongside an integrated power converter. It is suitable for designs prioritizing low electromagnetic interference due to its optimized emission characteristics. Consider the 20-SOIC footprint and thermal dissipation capabilities when planning the PCB layout for high-density applications.

Part Context

This model belongs to the ISOW774x family of quad-channel digital isolators. It shares architectural similarities with variants like the ISOW7742 but differs in channel configuration and specific performance metrics such as pulse width distortion. The series emphasizes compact integration of isolation and power conversion in a single package.

Replacement Considerations

The ISOW7742DFMR is a related variant within the same family. Verify functional equivalence regarding channel directionality and pulse width distortion before substitution.