ISOW7743FDFMR

Overview

The ISOW7743FDFMR is a reinforced, quad-channel digital isolator from Texas Instruments featuring integrated isolated power. It provides galvanic isolation with a data rate of 100 Mb/s and an insulation voltage of 5000 Vrms. The device operates within a supply voltage range of 2.97 V to 5.5 V, drawing a typical operating current of 4.4 mA or 11.4 mA depending on configuration. Key electrical parameters include a propagation delay of 10.7 ns, maximum rise time of 3.6 ns, and fall time of 3.5 ns. It supports unidirectional signal transmission and includes a shutdown function. The component is housed in a 20-pin SOIC package and functions across a temperature range of -40°C to +125°C.

Feature Summary

• Integrates isolated power generation with four digital channels for simplified system design
• Provides reinforced galvanic isolation to protect sensitive circuitry
• Features low electromagnetic emissions and low ripple characteristics

Applications

• Industrial automation systems requiring robust signal isolation
• Medical equipment needing reinforced safety isolation
• Power electronics monitoring and control interfaces

Procurement Notes

Verify the specific suffix FDFMR confirms the SOIC-20 package and tape-and-reel shipping format. Ensure the order matches the required channel configuration (1/3 split) and that the manufacturer is Texas Instruments. Confirm RoHS compliance status through official documentation before procurement.

Selection Notes

Select this component when reinforced isolation and integrated power are required in a single package. It is suitable for applications demanding high common-mode transient immunity and low skew. Compare against non-integrated power isolators if board space allows separate power supplies. Verify thermal dissipation capabilities within the SOIC-20 package for the specific application load.

Part Context

This part belongs to the ISOW774x family of digital isolators. It shares the SOIC-20 footprint with variants like the ISOW7740 but differs in internal channel configuration and power integration. It serves as a compact solution for replacing multiple discrete isolation components in industrial and medical designs.

Replacement Considerations

Direct substitutes may include other ISOW774x series variants with matching pinouts. Verify functional equivalence regarding the 1/3 channel split and integrated power specifications. Cross-reference datasheets for identical insulation ratings and package dimensions.