FCXO-05-54.000000MHZ FCXO-0565.000MHz FCXO-0566.6666MHz FCXO-0572.000MHZ FCXO-05-74.25MHZ FCXO-058.000MHz FCXO-058MHz FCXO-05-T-2.048MHZ FCXO-06 1.8432MHz FCXO-06 12MHz