FOD819

Overview

The onsemi FOD819 is a high-speed phototransistor optocoupler featuring a single channel and a 4-pin DIP package. It provides 5000Vrms isolation voltage between input and output circuits. The device supports a maximum collector-emitter voltage of 80V and a collector current of 50mA. Typical switching characteristics include an 18μs rise time and an 18μs fall time, suitable for general-purpose digital signal isolation applications.

Feature Summary

• High-speed phototransistor output for efficient signal transmission
• Robust 5000Vrms insulation voltage for circuit protection
• Single-channel configuration in a compact 4-pin DIP format

Applications

• General-purpose digital signal isolation
• Microprocessor system interface circuits
• Solid-state relay driver applications

Procurement Notes

Verify the specific suffix code against the manufacturer datasheet to confirm exact packaging and tape-and-reel specifications. Ensure the selected variant meets the required insulation certification standards for your target market. Confirm that the operating temperature range aligns with your environmental design constraints before finalizing procurement orders.

Selection Notes

Select this component when high-speed switching is required alongside strong electrical isolation capabilities. The 80V collector-emitter rating allows for versatile load driving compared to lower-voltage alternatives. Consider the 4-pin DIP footprint if through-hole mounting is preferred over surface-mount options for mechanical stability.

Part Context

This part belongs to the FOD series of transistor-output optocouplers from onsemi. It complements other devices in the family by offering higher speed performance than standard variants while maintaining reliable galvanic isolation. The technology utilizes an infrared LED coupled to a silicon phototransistor for signal transfer.

Replacement Considerations

Direct replacements may include other high-speed phototransistor optocouplers with matching 5000Vrms isolation and 4-pin DIP packages. Verify pinout compatibility and ensure equivalent switching times to maintain circuit timing integrity during substitution.