VO4158D

Overview

The VO4158D is a high-speed optocoupler featuring an AlGaAs infrared LED coupled to a monolithic integrated circuit output stage. It provides a propagation delay of typically 200 ns and a pulse width distortion of 30 ns, ensuring precise signal transmission. The device operates with a common-mode transient immunity of 10 kV/µs minimum, making it suitable for noisy environments. It supports a data rate up to 1 Mbps and includes a built-in Schmitt trigger for clean digital output switching.

Feature Summary

• High-speed digital isolation with low propagation delay
• Built-in Schmitt trigger for noise immunity and clean switching
• High common-mode transient immunity for reliable operation in noisy systems

Applications

• Industrial automation control systems
• Data communication interfaces
• Power supply feedback loops

Procurement Notes

Verify the specific suffix 'D' indicates the tape and reel packaging format when ordering. Confirm that the operating temperature range meets your system requirements, as industrial variants may differ from commercial grades. Ensure input current limits are respected to maintain optimal LED lifespan and performance consistency across production batches.

Selection Notes

Select this component when high-speed digital isolation is required alongside robust noise rejection capabilities. The integrated Schmitt trigger eliminates the need for external conditioning circuits, simplifying board layout. Consider the package type and lead configuration compatibility with your existing PCB footprint before finalizing the design integration.

Part Context

This part belongs to Vishay's VO415x series of high-speed optocouplers designed for demanding digital isolation applications. The series emphasizes speed and reliability, utilizing advanced AlGaAs technology for efficient light coupling. The VO4158D specifically targets applications requiring fast response times and high common-mode noise suppression.

Replacement Considerations

Check for direct pin-compatible alternatives within the same manufacturer's portfolio that offer similar propagation delays and CMTI ratings. Verify that any substitute maintains the same logic output polarity and input forward voltage characteristics to ensure circuit compatibility without redesign.