ISOW7821DWER

Overview

The ISOW7821DWER is a high-performance, reinforced dual-channel digital isolator from Texas Instruments. It integrates a high-efficiency DC-DC converter with an on-chip transformer to provide isolated power and signal transmission. The device supports data rates up to 100 Mbps and features a robust isolation barrier rated for 5000-VRMS. It operates within a wide input supply range of 3 V to 5.5 V and offers common-mode transient immunity of 100 kV/µs. Packaged in a 16-pin SOIC, it ensures reliable operation with a projected lifetime exceeding 100 years at 1 kVRMS working voltage.

Feature Summary

• Integrated high-efficiency DC-DC converter with on-chip transformer for isolated power delivery
• Robust reinforced isolation barrier ensuring long-term reliability
• High-speed data transmission capability supporting 100 Mbps rates

Applications

• Industrial automation systems requiring galvanic isolation
• Medical equipment needing reinforced safety isolation
• Power metering applications with high-voltage interfaces

Procurement Notes

Verify the specific suffix (e.g., DWER) matches the required package type and tape-and-reel quantity. Confirm that the 5000-VRMS reinforced isolation rating aligns with your system's safety standards and regulatory requirements. Ensure the integrated DC-DC converter output specifications meet the load demands of the isolated side circuitry before procurement.

Selection Notes

Select this component when both signal isolation and isolated power generation are required in a single package. The integrated transformer eliminates external magnetics, simplifying PCB layout. Consider the 100 Mbps speed limit and 100 kV/µs CMTI for high-noise environments. Verify compatibility with the 3-V to 5.5-V input supply range for the primary side.

Part Context

This part belongs to the ISOW7821 family of dual-channel digital isolators. It distinguishes itself by embedding the power conversion stage directly on the silicon, reducing component count compared to discrete solutions. The reinforced insulation rating meets stringent UL 1577 standards, making it suitable for applications demanding high safety integrity levels.

Replacement Considerations

Direct replacements must match the 16-pin SOIC package and integrated DC-DC functionality. Verify equivalent isolation ratings and data rates. Cross-reference pinouts to ensure compatibility without redesigning the isolation boundary.