6N138, 6N139 and HCPL-2730, HCPL-2731 are low input current, high gain split darlington optocouplers. This product has low current (0.5 mA), high CTR (2000%), high CMR (10 kV/µs) and high temperature stability (0-70°C).
This document describes the Fairchild Semiconductor Darlington Optocouplers, specifically the single-channel models 6N138 and 6N139, and the dual-channel models HCPL-2730 and HCPL-2731. These devices consist of an AlGaAs LED optically coupled to a high gain split darlington photodetector, designed for applications requiring digital logic ground isolation and high common mode noise rejection.
The optocouplers feature a very low input current of 0.5 mA and a high current transfer ratio of up to 2000%. The split darlington configuration allows for lower output saturation voltage and higher speed operation compared to conventional darlington phototransistor optocouplers. An internal noise shield provides exceptional common mode rejection of 10 kV/us.
| Low Input Current | 0.5 mA |
|---|---|
| Superior CTR | 2000% |
| Superior CMR | 10 kV/us |
| Operating Temperature | -40 to +85 °C |
| Storage Temperature | -55 to +125 °C |
| DC/Average Forward Input Current | 20 mA |
| Peak Forward Input Current | 40 mA |
| Average Output Current | 60 mA |
| Output Power Dissipation | 100 mw |
They are useful for digital logic ground isolation, telephone ring detectors, EIA-RS-232C line receivers, high common mode noise line receivers, LP bus isolation, and current loop receivers.
The CTR is guaranteed to be 2000%.
The devices provide exceptional common mode rejection of 10 kV/us.
The operating temperature range is -40 to +85 °C.