ISOW7741FDFMR

Overview

The ISOW7741FDFMR is a quad-channel digital isolator from Texas Instruments featuring an integrated DC-DC converter. It provides galvanic isolation with a maximum insulation voltage of 5000 Vrms and supports data rates up to 100 Mb/s. The device operates within a supply voltage range of 2.97 V to 5.5 V and includes shutdown functionality. It exhibits a propagation delay of 15 ns and a common-mode transient immunity of 85 kV/µs. 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 a high-efficiency isolated DC-DC converter to eliminate the need for external isolated power supplies.
• Provides reinforced galvanic isolation with high common-mode transient immunity for robust signal integrity.
• Features low electromagnetic interference emissions and low ripple output from the integrated power stage.

Applications

• Industrial automation systems requiring isolated communication interfaces
• Medical equipment needing reinforced electrical isolation
• Automotive electronics utilizing isolated CAN or LIN bus networks

Procurement Notes

Verify the specific suffix FDFMR confirms the SOIC-20 package and tape-and-reel orientation. Confirm RoHS compliance status through official manufacturer documentation. Ensure the part number matches the exact channel configuration and integrated power requirements for your design.

Selection Notes

Select this component when an integrated isolated power source is required alongside signal isolation. Compare against non-integrated variants like ISO774x if external power management is preferred. Verify that the 5000 Vrms insulation rating meets the safety standards of the target application environment.

Part Context

This part belongs to the ISOW774x family, which combines digital isolation with integrated power conversion. It differs from the ISO774x series by including the DC-DC converter on-chip. The FDFMR suffix denotes the specific 20-lead SOIC package variant suitable for surface-mount assembly.

Replacement Considerations

Direct substitutes include other members of the ISOW774x family such as ISOW7740FDFMR or ISOW7743FDFMR, depending on the required channel directionality and shutdown pin availability. Verify pin compatibility before substitution.

FAQ

Does the ISOW7741FDFMR require an external isolated power supply?

No, it features an integrated DC-DC converter that generates the isolated supply voltage internally.

What is the common-mode transient immunity (CMTI) of this device?

The device offers a typical CMTI of 85 kV/µs.