Hi,
I have launched a similar question in the kicad forum, but maybe this is a more suitable forum for such an issue.
I need to repair a batch of an obsolete pcb. It has a sot23-3 component marked 22NY.
Does somebody know which part is it?
It seems it is not a transistor nor a diode. Its reference is U while diodes and transistors on the same board are marked as D and Q. And I have read a lot of lists of transistor and diode marking.
I have made searches on the internet with no success.
From the schematic and the general description of what it’s supposed to be, I knew what behavior likely made the most sense.
In this case, we needed to check if an input voltage was at a certain voltage in order to enable more circuitry downstream. Like 3-pin linear regulators, 3-pin voltage detectors are made with pre-set voltages, so it seemed likely that the 22 coded for the voltage (2.2v).
Armed with that guess and a few google searches, I tracked down likely detectors in SOT-23. The third datasheet that I looked at looked like a match. (22Nx – but it’s not absolutely sure if the x is a literal x or a placeholder x.) At any rate, I think the device fits the bill for what’s needed in the circuit.
