FOD617D

Overview

The FOD617D is a single-channel phototransistor output optocoupler manufactured by Fairchild Semiconductor, now part of onsemi. It features an NPN phototransistor output and operates within a temperature range of -55°C to +110°C. Key electrical parameters include a maximum collector-emitter voltage of 70 V, a forward current of 50 mA, and an isolation voltage of 5000 Vrms. The device exhibits a typical current transfer ratio of 320%, with rise and fall times of 18 µs each. It is housed in a PDIP-4 package.

Feature Summary

• Provides high-voltage isolation between input and output circuits
• Utilizes a compact four-pin dual in-line package for space-efficient mounting
• Designed for operation across extended industrial temperature ranges

Applications

• General-purpose signal isolation in digital communication interfaces
• Switching power supply feedback loops
• Microcontroller input/output isolation

Procurement Notes

Verify the specific manufacturer source, as Fairchild Semiconductor has been integrated into onsemi. Confirm whether the component is available as new production or through authorized distributors handling obsolete inventory. Ensure the ordering suffix matches the required package type and compliance standards before finalizing procurement.

Selection Notes

Select this component when a standard phototransistor output is sufficient for low-speed digital isolation. Consider the 5000 Vrms isolation rating for safety requirements. Evaluate the 18 µs switching speed against system timing constraints. Verify that the PDIP-4 package fits the PCB layout and assembly process capabilities.

Part Context

The FOD617D belongs to the FOD617 series of 4-pin phototransistor optocouplers. This series was originally developed by Fairchild Semiconductor and continues under onsemi after corporate integration. The device shares architectural similarities with other members like the FOD817 series but may differ in specific performance metrics such as current transfer ratio and switching speeds.

Replacement Considerations

Check for direct equivalents within the FOD617 family, such as the FOD617BS for surface mount applications. Verify pin compatibility and electrical specifications against alternative parts from onsemi or other manufacturers offering similar transistor-output optocouplers.