I've designed a circuit that relies on the action of momentary pushbuttons as described here:
Namely, that a 4 pin pushbutton can have two pairs of pins (1,2) and (3,4) such that:
Switch Open: (1 and 2) are a connected pair, (3 and 4) are a connected pair and the pairs are not connected to each other
Switch Closed: (1 and 3) are a connected pair, (2 and 4) are a connected pair and the pairs are not connected to each other
However, after ordering some buttons that then have the alternate (and seemingly more common) operation of
Switch Closed: All pins connected.
I realised the error of my ways.
How would I differentiate these two types of buttons when searching? Does anyone have an example of a component explicitly implementing the button behaviour described above?
[Unfortunately I rushed ahead and already ordered a PCB with a 6mm push button footprint after testing with similar components, excluding the specific button. I'm aware I could implement other solutions, but if someone has an answer to this specific question, it would save me a lot of rework.]