Can I use a different crystal frequency than that recommended by the data sheet?
Yes, but you must do so with caution, and remember; CML does not guarantee the performance of its devices when operated outside of their specified parameters. In general, when a CML device is operated with a non-recommended crystal frequency, all of the device parameters scale in direct proportion to the change in crystal frequency. If a higher-than-recommended crystal frequency is used, all of the device output tones/filter bandwidths/data rates and other parameters will increase proportionally, and the converse holds true for slower crystal frequencies. Not all CML devices operate in this manner, however. Some devices have on-board continuous time filters that do not scale with clock frequency. Consequently, these devices will not operate properly when ran at higher clock frequencies. There are applications where this type of operation makes sense, but the resulting device (and circuit) operation must be carefully considered. For more information about whether this type of operation
