YXC products are divided into two parts: active and passive. Passive crystal are widely used at low cost. We also recommend YXC active crystal oscillators. At present, all our active crystal oscillators are programmable , Including KHz and MHz, can meet almost any requirements. we believe that the programmable crystal oscillator of mems is also the future development direction. In addition, if there are any technical problems & confusions of choice, please don’t hesitate to leave us message.