The maximum operating temperature range for the LTC1799CS5 is -40°C to 125°C.
To ensure the oscillator starts reliably, make sure to decouple the VCC pin with a 0.1uF capacitor, and use a high-quality crystal with a load capacitance of 18pF.
The recommended layout for the LTC1799CS5 is to keep the crystal and capacitors close to the IC, and to use a ground plane to minimize noise and radiation.
The frequency of the oscillator can be adjusted by changing the value of the crystal or by using a different load capacitance value.
The maximum output frequency of the LTC1799CS5 is 133MHz.