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The information presented in this cross reference is based on TOSHIBA's selection criteria and should be treated as a suggestion only. Please carefully review the latest versions of all relevant information on the TOSHIBA products, including without limitation data sheets and validate all operating parameters of the TOSHIBA products to ensure that the suggested TOSHIBA products are truly compatible with your design and application.
Please note that this cross reference is based on TOSHIBA's estimate of compatibility with other manufacturers' products, based on other manufacturers' published data, at the time the data was collected.
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When transferring signals from the input side to the output side, a photocoupler is a device capable of transferring them between circuits in a state of electrical isolation. Inside the photocoupler, electrical input signals are converted into optical signals once by using a light-emitting device, and then these optical signals are output after being reconverted into electrical signals by using a photodetector device. In many devices such as FA, OA, and home electronics devices, different DC and AC power supply systems are placed inside the same board, and signals are transferred between them. If these systems are directly connected, a safety problem may develop in terms of operation. By using a photocoupler, even in such a case, signals can be transferred in a state of electrical isolation.