Optocoupler/LED/nixie tube/photoelectric device

The HCPL4502M, HCPL4503M, HCPL2503M, 6N135M, 6N136M, HCPL2530M, and HCPL2531M optocouplers consist of an AlGaAs LED coupled to a high-speed photodetector transistor. By reducing the base-collector capacitance of the input transistor, a separate connection for photodiode biasing increases speed by several orders of magnitude over conventional phototransistor optocouplers. The HCPL4503M is not internally connected to the phototransistor base to help improve noise immunity, and the internal noise shield provides best-in-class common-mode rejection up to 50,000V/µs.

The FODM217 series of single-channel DC sense input optocouplers incorporate a gallium arsenide (GaAs) infrared light-emitting diode in a compact half-pitch miniature flat 4-pin encapsulation. The input-output isolation voltage VISO is rated at 3,750 VACRMS.

The 6N138M/9M and HCPL2730M/31M ​​optocouplers consist of an AlGaAs LED optically coupled to a high gain split Darlington photodetector. The split Darlington configuration separates the input photodiode and first-order gain from the output transistor, allowing for lower output saturation voltage and faster operation than conventional Darlington optocouplers. In the dual-channel devices HCPL2730M/HCPL2731M, the integrated emitter-base resistor has excellent stability over temperature. The combination of an extremely low input current of 0.5mA and a high current transfer ratio of 2000% makes this series ideal for use as an input interface for MOS, CMOS, LSTTL and EIA RS232C, while ensuring output compatibility to CMOS and high fanout TTL requirements. Internal interference shielding with excellent common-mode rejection of 10 kV/µs.