Newbie level 5
I try to debug the circuit here I face a problem that the transmitter pin from MCU is connected to the NSBC114EDP6 (SMD marking code 7A) input pin 2 and the output pin from pin 3 is connected to another MCU receiver pin.
I have scoped the input and output data form the IC NSBC114EDP6. There is no voltage difference and i have attached scoped image below.
channel_1 (yellow) - Input NSBC114EDP6 IC
channel_2 (green) - output NSBC114EDP6 IC
I want know what is the purpose of using NSBC114EDP6 IC.