Figure 8-10 through Figure 8-14 show the recommended input interfacing and termination circuits. Unused clock
inputs can be left floating or pulled down.
Figure 8-10 Single-Ended LVCMOS (1.8V, 2.5V, 3.3V) to Reference (INx_P) or XO Input
(XO)
Figure 8-11 DC-Coupled LVPECL to Reference (INx)
Figure 8-12 DC-Coupled HSDS/LVDS to Reference (INx)
Figure 8-13 DC-Coupled CML (Source Terminated) to Reference (INx)
Figure 8-14 HCSL
(Load Terminated) to Reference (INx)
Figure 8-15 AC-Coupled Differential to
Reference (INx)