The 200 MHz maximum frequency covers the vast majority of FPGA reference clocks, Ethernet PHY MAC clocks, and processor core clocks used in commercial equipment. The 2:18 input-to-output ratio means you can feed two independent clock sources into the buffer and select between them, while the eighteen outputs can drive multiple loads — useful for backplane clock distribution or synchronising several ASICs from a single oscillator. Because the part is specified as a low-skew driver, the propagation delay variation between any two outputs stays tight, which matters when the receiving devices have tight setup-and-hold windows.
It is not specified for extended-temperature operation.
The part is RoHS non-compliant per the original release, so verify your assembly line's solder alloy and reflow profile if you are running lead-free processes.