6N139SD [QT OPTOELECTRONICS]

The split darlington configuration separates the input photodiode and the first stage gain from the output transistor, permitting lower output saturation voltage and higher speed operation than conventional darlington phototransistor optocouplers. In dual-channel devices (HCPL2730/HCPL2731), an integrated emitter-base resistor provides superior stability over temperature. The combination of very low input current (0.5mA) and high current transfer ratio (2000%) makes this family useful for input interfaces to MOS, CMOS, LSTTL, and EIA RS232C, with output compatibility to CMOS and high fan-out TTL. An internal noise shield provides exceptional common mode rejection of 10 kV/µs.