Vectron International's PX-7020-0042-16M0000000 high temp crystal oscillator has 3.3 volts, a HCMOS output, 400ppm and a 16MHz frequency.  This oscillator is a surface mount product with a maximum operating temperature of 230C.  Vectron International is a world leader in the design, manufacture and marketing of Frequency Control, Sensor and Hybrid Product solutions using the very latest techniques in both bulk acoustic wave and surface acoustic wave based designs from DC to microwave frequencies.  Products include crystals and crystal oscillators; frequency translators; clock and data recovery products; SAW filters; Crystal filters and components used in telecommunications, data communications, frequency synthesizers, timing, navigation, military, aerospace and instrumentation systems.