ELD205

Overview

The ELD205 is a dual-channel phototransistor output optocoupler manufactured by Everlight Electronics. It integrates an infrared emitting diode and two phototransistors in an 8-pin SOP package to provide electrical isolation between input and output circuits. The device offers a high insulation voltage of 3750 Vrms, ensuring safety in signal transmission applications. Key electrical parameters include a typical turn-on time of 5µs and turn-off time of 4µs at 10mA forward current. The current transfer ratio ranges from 40% to 80%, with a maximum collector-emitter voltage of 80V. It operates within a temperature range of -55°C to 110°C.

Feature Summary

• Dual-channel configuration for simultaneous signal isolation
• High insulation voltage capability for safety compliance
• Surface-mount SOP8 packaging for automated assembly

Applications

• Digital logic signal transmission and level shifting
• Power supply control and switching circuits
• Electrical isolation between system components

Procurement Notes

Verify the specific suffix (e.g., TA, TB) as it denotes different packaging or binning options. Confirm RoHS compliance status through official documentation before procurement. Check moisture sensitivity levels if storage conditions are critical. Ensure the supplier provides valid datasheets matching the exact part number variant to avoid functional mismatches in design integration.

Selection Notes

Select this component when dual-channel isolation is required in a compact surface-mount form factor. Consider the 3750 Vrms insulation rating for applications demanding high safety standards. Evaluate the 5µs/4µs switching speeds against circuit timing requirements. Verify that the 80V output voltage rating meets the load specifications. Compare thermal performance within the -55°C to 110°C operating range against environmental constraints.

Part Context

The ELD205 belongs to Everlight's family of transistor-output optocouplers designed for general-purpose isolation. It shares the 8-SOP footprint with variants like ELD206 and ELD207 but differs in channel count and internal configuration. This series targets cost-sensitive applications requiring reliable galvanic isolation without the complexity of multi-component discrete solutions.

Replacement Considerations

Direct substitutes may include other dual-channel phototransistor optocouplers with compatible pinouts and isolation ratings. Verify equivalent CTR ranges and switching speeds to ensure circuit compatibility. Check for identical package dimensions to maintain PCB layout integrity.