FOD073L

Overview

The FOD073L is a dual-channel optocoupler featuring LVTTL and LVCMOS compatibility with low input current and high gain. It utilizes a split Darlington output configuration to achieve high current transfer ratio. The device provides electrical isolation of 2500 Vrms between the input LED and the output phototransistors. Designed for surface-mount applications, it operates within an ambient temperature range of -40°C to +85°C. Key electrical characteristics include a typical forward voltage of 1.35V and a maximum DC forward current of 20 mA per channel.

Feature Summary

• Dual-channel architecture with split Darlington output structure for enhanced signal integrity
• Compatible with LVTTL and LVCMOS logic families while maintaining low input drive requirements
• Provides robust galvanic isolation rated at 2500 Vrms between input and output circuits

Applications

• Industrial communication interfaces requiring isolated data transmission
• Ground potential difference elimination in mixed-signal systems
• Signal isolation in microcontroller-based control circuits

Procurement Notes

Verify the specific suffix designation on the component marking against the official Fairchild Semiconductor datasheet to confirm pinout orientation and tape-and-reel specifications. Ensure that the procurement source provides documentation confirming compliance with RoHS directives and material declarations. Cross-reference the manufacturer part number with authorized distributor catalogs to validate authenticity and traceability before finalizing acquisition.

Selection Notes

Select this component when designing circuits that require simultaneous isolation of two independent signals with strict logic level compatibility constraints. The split Darlington topology offers superior noise immunity compared to standard single-transistor outputs. Evaluate the thermal management requirements based on the specified operating temperature range and ensure the PCB layout supports the surface-mount package dimensions for reliable soldering.

Part Context

The FOD073L belongs to the family of high-speed digital isolators manufactured by Fairchild Semiconductor, now part of ON Semiconductor. This series addresses the need for compact, reliable isolation solutions in space-constrained electronic designs. The device represents a transition toward lower power consumption optocouplers while maintaining high gain characteristics suitable for modern low-voltage logic interfaces.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.