66.6667 MHz CMOS XO with AEC-Q100 grade
The DSC1001CI1-066.6667: This is a 66.6667 MHz standard XO (CMOS output) from Microchip's DSC1001 MEMS family, qualified to AEC-Q100 — the first thing to confirm is that your BOM calls for a MEMS-based oscillator at this frequency, not a quartz crystal.
Supply range and power draw
It runs on a 1.8V to 3.3V supply rail — a single oscillator that can straddle a 3.3V I/O bank or a 1.8V core domain without a level translator.
Temperature range and frequency stability
Housed in a 4-SMD, No Lead package measuring 3.20 mm x 2.50 mm with a seated height of 0.90 mm.