ICs Integrated Circuit

The pin layout of TLP250 is given below. It is clearly shown in the figure that led at the input stage and the photodetector diode at the output stage is used to provide isolation between input and output. Pin numbers 1 and 4 are not connected to any point. Hence they are not in use. Pin 2 is an anode point of the input stage light-emitting diode and pin 3 is the cathode point of the input stage. Input is provided to pins 2 and 3. Pin 8 is for the supply connection. Pin 5 is for the ground of the power supply.