I would like to know whether it is suitable (not harmful) to put a 4 pin passive crystal in a 2 pin footprint.
Thanks in advance.
I have a 2 pin footprint in my PCB board,however,I only have a 4 pin passive crystal (8M). I have to solder like this: connect 1# to 2#,connect 3# to 4#;
Best Answer
You should connect both end of crystal at their place and GND of 4-pin crystal to GND on your PCB. GND on crystal is for shielding and if you don't connect it it will work but radiate more.