This is a 15 MHz XO (Standard) oscillator using a MEMS base resonator, delivering a CMOS output. The 1.8V supply rail is fixed — the part does not support 3.3V or other logic levels without a level translator.
Housed in a 4-SMD, No Lead package measuring 2.50 mm x 2.00 mm with a seated height of 0.90 mm. The 0.098" x 0.079" footprint is common among small MEMS oscillators; confirm the pad layout matches the existing board land pattern before committing.
