What this clock IC does in the timing tree
The CY25100SXIF is a single-circuit PLL that accepts a CMOS or crystal input and produces two CMOS outputs at up to 200 MHz. The integrated spread-spectrum modulation reduces peak EMI on the output clock — useful when the board must pass radiated-emissions testing without a metal shield. The 1:2 fanout ratio means one input drives two output traces; the PLL cleans up jitter from the source and re-times the edges. Because the part lacks differential outputs, it targets single-ended CMOS clock trees — not LVDS or LVPECL backplanes.
Supply rail and temperature — what to budget
The supply range is 3.13 V to 3.45 V — a 3.3 V nominal rail with ±4 % tolerance. A standard 3.3 V ±10 % rail (2.97 V to 3.63 V) exceeds the upper limit; use a regulated 3.3 V LDO or a switcher with tight setpoint to stay inside the window. The 8-SOIC package (3.90 mm width) is a common footprint; the SOIC-8 land pattern matches standard IPC-7351 guidelines.