There is a case of LQFP in which it is packaged. Tape & Reel (TR) is the form in which it is packaged. It is recommended that the maximum value for normal operation is 200MHz. In this case, it is placed in the way of Surface Mount. Temperatures below -40°C are required to keep it reliable. Temperatures below 85°C allow stable operation.
ICS83940AYI-02LFT Features
ICS83940AYI-02LFT Applications
There are a lot of Integrated Device Technology (IDT) ICS83940AYI-02LFT Clock Buffers & Drivers applications.