ISOW7741QDFMRQ1

Overview

The ISOW7741QDFMRQ1 is an automotive-grade, reinforced digital isolator featuring four isolated channels with a 3/1 input/output configuration. It integrates an on-chip DC-DC converter to provide power across the isolation barrier, eliminating the need for external isolated supplies. The device supports data rates up to 100 Mbps and offers a common-mode transient immunity of 85 kV/µs. It operates within a supply voltage range of 2.97 V to 5.5 V and functions reliably in temperatures from -40°C to +125°C. Packaged in a 20-pin SOIC (DWV) format.

Feature Summary

• Integrates a low-emission DC-DC converter to generate isolated power, reducing system component count.
• Provides reinforced insulation certification suitable for demanding automotive safety applications.
• Features low electromagnetic interference emissions to minimize impact on surrounding circuitry.
• Delivers high-speed data transmission with robust common-mode transient immunity.

Applications

• Automotive battery management systems
• Inverter control circuits
• On-board charger interfaces
• Telematics gateway modules

Procurement Notes

Verify that the specific suffix matches the required package type and tape-and-reel quantity. Confirm AEC-Q100 Grade 1 qualification status aligns with the target automotive application requirements. Ensure the integrated DC-DC converter output specifications meet the downstream load demands without requiring additional external filtering components beyond standard recommendations.

Selection Notes

Select this component when reinforced isolation and integrated power are required to simplify the bill of materials. Compare propagation delay and jitter specifications against other ISO77xx variants if precise timing alignment is critical. Evaluate the thermal performance of the 20-pin SOIC package against the expected power dissipation of the internal DC-DC converter under maximum operating conditions.

Part Context

This part belongs to the ISOW774x-Q1 family of quad-channel digital isolators. Unlike the ISO7741 series which requires external isolated power supplies, the ISOW774x series includes an integrated DC-DC converter. This distinction simplifies layout and reduces the number of passive components needed for isolation barrier power generation in complex automotive electronic architectures.

Replacement Considerations

• ISOW7741QDWRQ1

FAQ

Does the ISOW7741QDFMRQ1 require an external isolated power supply?

No, it features an integrated DC-DC converter that generates the isolated power required for the secondary side channels.

What is the maximum data rate supported by this isolator?

The device supports data rates up to 100 Mbps.