The CF5015 series are 2.5V operation crystal oscillator ICs. They are available for frequencies up to 60MHz. The product lineup consists of ALx series for 2.5V exclusive use and BLx series compliant with 2.5V to 5V. The built-in oscillator capacitor of ALx series is large, so that ALx series contribute to improve the frequency stability. For the BLx series, the current consumption and drive level reduced so that they can realize the characteristics easier to design small-sized crystal oscillators. The oscillator circuit of each version is simply constructed, so that it can realize the crystal oscillator with excellent phase noise characteristics. Even if the valued characteristics differ due to the application or the purpose, the selecting from these series for different purposes allows the optimization.