Hello,
It’s a control PCB from an kitchen oven.
The issue it lost comms with the user interface board on the front panel.
The chip is on the TX path of the data line (single wire for TX/RX running on 50Hz clock, generated from the mains).
The obvious purpose is to buffer that line as the other side is pulling the same wire to ground when transmitting.
[At least it’s what I think.]
However, it seems that at the moment this chip pulls down the line constantly to 2.3 volts, which is too low compared to the 5 volts level observed otherwise.
However, I couldn’t find any datasheet that matches the pinout.
Anyone - can you help me identify this chip?