I have an obsolete, proprietary crystal oscillator. It is a 200MHz, 10 pin, SMT component. The number on the unit is 200N1. I cannot find another C.O. like it in size, number of pins or footprint. What I don't understand is 9 of the pins are grounded. Only one pin is used and it obviously puts out the frequency. How does that work? We have 100s of units we repair with this C.O. in it and they are starting to fail due to age and heat. What we would like to do is find some comparable C.O., mount it on a small PCB, which in turn would be mounted to the footprint of the old C.O. I am an electro-mechanical engineering technician, not an engineer. Our EE on staff has no clue, either. Any info would be much appreciated!