ISOW7741DFMR

Overview

The ISOW7741DFMR is a quad-channel digital isolator from Texas Instruments featuring an integrated low-emissions, low-noise DC-DC converter. It provides galvanic isolation with a maximum data rate of 100 Mb/s and a common-mode transient immunity of 85 kV/µs. The device operates within a supply voltage range of 2.97 V to 3.63 V for the isolated side and 4.5 V to 5.5 V for the primary side. It supports unidirectional signal transmission across four channels and functions reliably within an operating temperature range of -40°C to +125°C.

Feature Summary

• Integrates a low-emissions, low-noise DC-DC converter to provide isolated power without external components.
• Delivers high common-mode transient immunity of 85 kV/µs for robust noise rejection in harsh environments.
• Offers galvanic isolation with reinforced insulation ratings suitable for safety-critical applications.

Applications

• Industrial automation systems requiring reliable signal isolation
• Medical equipment needing reinforced galvanic separation
• Energy management systems with high-voltage interfaces

Procurement Notes

Verify the specific suffix DFMR confirms the SOIC-20 package and tape-and-reel quantity when ordering. Confirm that the integrated DC-DC converter meets the target application's power budget requirements. Ensure compatibility with the required isolation voltage standards for the specific end-use environment before finalizing procurement.

Selection Notes

Select this component when a single solution is needed for both signal isolation and isolated power generation. It is appropriate for designs where board space is limited and external isolated power supplies are undesirable. Consider the 100 Mb/s data rate limit and the specific channel configuration requirements for the interface design.

Part Context

This part belongs to the ISOW774x family of quad-channel digital isolators. The series is characterized by its integration of a proprietary DC-DC converter, distinguishing it from standard capacitive or magnetic isolators that require external power management. It serves as a complete isolation barrier solution for complex system architectures.

Replacement Considerations

Public confirmed substitute part numbers: None identified in provided documentation.