The TLP557 is an optically coupled isolator manufactured by Toshiba America Electronic Components. It consists of an infrared light emitting diode and a phototransistor, both housed in a DIP-8 package.Description:The TLP557 is an optically coupled isolator that provides a high degree of electrical isolation between input and output. It is designed to transfer digital signals between two isolated circuits. The device has an isolation voltage of 5.7kVrms and a maximum forward current of 10mA.Features: High isolation voltage of 5.7kVrms Low input current of 1mA High collector-emitter voltage of 80V Low propagation delay of 10ns High common mode transient immunity of 10kV/μs High noise immunity of 10V/μsApplications:The TLP557 is suitable for use in a wide range of applications, including industrial control systems, power supplies, medical equipment, and automotive systems. It can be used to transfer digital signals between two isolated circuits, providing a high degree of electrical isolation.(For reference only)
https://www.utsource.net/itm/p/498911.html