FODM1008

Overview

The FODM1008 is a single-channel transistor output optocoupler manufactured by onsemi, formerly Fairchild Semiconductor. It features an NPN phototransistor output and operates with a DC input. The device provides high isolation capability with an insulation voltage of 5000Vrms. Key electrical parameters include a maximum collector-emitter voltage of 70V and a maximum collector current of 50mA. The forward voltage is typically 1.4V at a maximum forward current of 50mA. Current transfer ratio ranges from 130% to 260%. Switching characteristics include a rise time of 5.7µs and a fall time of 8.5µs. The component is housed in a 4-pin LSOP surface-mount package.

Feature Summary

• Provides galvanic isolation between input and output circuits using an infrared LED and NPN phototransistor pair.
• Offers high dielectric strength with a rated insulation voltage of 5000Vrms for robust noise immunity.
• Designed for surface-mount assembly in a compact 4-pin LSOP extended body package.

Applications

• General-purpose signal isolation in industrial control systems
• Interface circuits for microcontrollers and logic families
• Power supply feedback loops requiring electrical separation

Procurement Notes

Verify the manufacturer designation as onsemi due to the integration of Fairchild Semiconductor. Confirm the specific ordering suffix corresponds to the required packaging format, such as tube or tape-and-reel variants like FODM1008R2. Ensure compliance with RoHS and REACH regulations as specified in the official documentation before finalizing procurement orders.

Selection Notes

Select this component when a single channel of transistor output isolation is required with a 5000Vrms rating. Consider the 50mA collector current limit and 70V breakdown voltage for circuit compatibility. The LSOP package is suitable for automated surface-mount assembly processes. Verify that the current transfer ratio specifications meet the drive requirements of the downstream load within the operating temperature range.

Part Context

This part belongs to the FODM100x series of transistor output optocouplers. Originally developed by Fairchild Semiconductor, production and distribution are now managed by onsemi following corporate integration. The series is characterized by standard pin configurations and performance metrics suitable for general isolation applications.

Replacement Considerations

The FODM1008R2 is a verified variant of this component available in tape-and-reel packaging. Other substitutes may exist but require verification against specific electrical parameters and package dimensions.

FAQ

What is the maximum collector-emitter voltage for the FODM1008?

The maximum collector-emitter voltage (Vceo) is 70V.

Does the FODM1008 support surface-mount technology?

Yes, it is available in a 4-pin LSOP surface-mount package.