Currently studying the LTC6954 datasheet and am confused as to why there is no recommended CMOS input configuration :

Can anyone help me on this?
LTC6954
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The LTC6954 is a family of very low phase noise clock distribution parts. Each part has three outputs and each output has an individually programmable...
Datasheet
LTC6954 on Analog.com
Currently studying the LTC6954 datasheet and am confused as to why there is no recommended CMOS input configuration :

Can anyone help me on this?
Hi ch4z ,
More information about the CMOS input configuration are discussed in the Page 41 and 42 of the data sheet.
All the best,
Jules
Thanks for the reply Jules.Nikko ,
Those pages are about the CMOS output configuration when interfacing with other CMOS devices, i'm asking about using a CMOS type signal as an input to the LTC6954.
Do you mean to say that the recommended output interface is the same as the recommended input ?
Kindly,
Charlie