FOD817BSD

Overview

The FOD817BSD is a single-channel phototransistor optocoupler manufactured by Fairchild Semiconductor, now part of ON Semiconductor. It integrates a gallium arsenide infrared emitting diode with a silicon phototransistor in a surface-mount DIP-4 package. The device provides high isolation voltage and supports lead-free IR reflow soldering processes.

Feature Summary

• Integrates a gallium arsenide infrared LED with a silicon phototransistor for signal transmission
• Designed for surface-mount assembly using standard reflow soldering techniques
• Provides high input-output electrical isolation capability

Applications

• Power supply regulators
• Digital logic inputs
• Microprocessor inputs

Procurement Notes

Verify the current manufacturer status as Fairchild Semiconductor has been integrated into ON Semiconductor. Confirm that the specific ordering suffix corresponds to the required surface-mount package configuration and check for any updated part number nomenclature changes due to system integration requirements.

Selection Notes

Select this component when a surface-mount transistor output optocoupler is required for digital or logic interface applications. Ensure the design accommodates the specific CTR range associated with the BSD suffix variant and verify compatibility with the target PCB footprint for the 4-pin SMD form factor.

Part Context

This device belongs to the FOD817 series of 4-pin phototransistor optocouplers. The series offers various Current Transfer Ratio (CTR) groupings to suit different gain requirements. The BSD designation specifically indicates the surface-mount packaging variant within this family.

Replacement Considerations

Check ON Semiconductor documentation for updated part numbers replacing Fairchild legacy codes. Verify pinout and package dimensions against equivalent surface-mount optocouplers from other manufacturers if sourcing from alternative suppliers.