FOD073LR1

Overview

The FOD073LR1 is a dual-channel logic output optocoupler manufactured by Fairchild Semiconductor. It features an 8-pin SOIC-W package and provides 2500Vrms isolation voltage between input and output circuits. The device utilizes a Darlington phototransistor output configuration, designed for high gain applications. It is compatible with LVTTL and LVCMOS logic families, ensuring seamless integration into digital control systems requiring galvanic isolation.

Feature Summary

• Dual-channel architecture providing independent signal isolation paths within a single compact package
• High current transfer ratio enabled by the Darlington phototransistor output structure
• LVTTL and LVCMOS logic compatibility for direct interface with standard digital controllers

Applications

• DC-to-DC converter control circuit isolation
• Solid-state relay driver interfaces
• Microprocessor system I/O isolation

Procurement Notes

Verify the specific suffix 'LR1' to confirm the tape-and-reel packaging variant when sourcing. Ensure the component meets RoHS compliance requirements if applicable to your manufacturing standards. Cross-reference the datasheet revision date to confirm the latest electrical characteristics and mechanical dimensions before finalizing the bill of materials.

Selection Notes

Select this component when high gain is required in a dual-channel isolation scenario. The Darlington output offers superior sensitivity compared to standard phototransistors but exhibits slower switching speeds. Evaluate the propagation delay constraints of your application against the device's switching time specifications to ensure timing integrity.

Part Context

This part belongs to Fairchild's family of LVTTL/LVCMOS compatible optocouplers. It serves as a bridge between low-voltage digital logic and higher voltage isolated domains. The series emphasizes low input current consumption while maintaining robust noise immunity through optical coupling mechanisms.

Replacement Considerations

Check for equivalents from ON Semiconductor or Rochester Electronics that match the 8-pin SOIC footprint and 2500V isolation rating. Verify pinout compatibility and logical function equivalence before substitution.