125 MHz fixed-frequency timing for 3.3V rails
The LMK60E2-125M00SIAT is a 125 MHz clock oscillator from Texas Instruments in a 6-QFM (7x5) package. It runs from a 3.135V to 3.465V supply, so it sits cleanly on a 3.3V rail with margin for ripple.
Power budget and field swap
Draws 162 mA typical at 125 MHz — factor that into the 3.3V rail budget, especially if the rail also feeds an FPGA bank or a PLL. The 6-QFM package is a surface-mount module; orientation is marked by pin 1 indicator on the top, so a rework station with hot air can swap it if the board layout gives access to the perimeter pads.