EL354

Overview

The EL354 is a single-channel phototransistor output optocoupler manufactured by Everlight Electronics Co Ltd. It features a 4-pin SOP surface-mount package with an input type supporting both AC and DC signals. The device provides electrical isolation with a maximum output voltage of 80V. Key electrical parameters include a typical rise time of 6µs and fall time of 8µs. The current transfer ratio ranges from a minimum of 20% to a maximum of 300% at a forward current of 1mA.

Feature Summary

• Single-channel phototransistor output configuration for signal isolation
• Surface-mount 4-pin SOP packaging design
• Supports both AC and DC input signal types

Applications

• Signal isolation in electronic circuits
• Interface between logic circuits and power stages
• General purpose optoisolation applications

Procurement Notes

Verify the specific suffix variant (e.g., EL354-V or EL354(TB)) against project requirements, as these may indicate differences in packaging or testing standards. Confirm availability status, as some sources classify this component as obsolete. Ensure the selected part matches the required isolation voltage and current transfer ratio specifications for the intended application circuit.

Selection Notes

Select the EL354 when a compact surface-mount solution is required for single-channel isolation. Consider the 6µs/8µs switching speeds for moderate-speed digital interfaces. Evaluate the 20%-300% current transfer ratio range to ensure adequate signal transmission under varying temperature conditions. Verify that the 80V output voltage rating meets the load requirements of the receiving circuit side.

Part Context

The EL354 belongs to the family of transistor output optocouplers produced by Everlight Electronics. It is designed for general-purpose isolation tasks where space constraints favor surface-mount technology. The component serves as a bridge between low-voltage control logic and higher-voltage or noisy power sections, ensuring galvanic separation while transmitting data or control signals.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Cross-reference with other single-channel phototransistor optocouplers only if pinout and electrical characteristics match exactly.

FAQ

What is the typical switching speed of the EL354?

The typical rise time is 6µs and the typical fall time is 8µs.

Does the EL354 support AC inputs?

Yes, the input type specification for the EL354 supports both AC and DC signals.