The DSC6001JI2B-027.0000 is a 27 MHz MEMS-based XO (Standard) oscillator from Microchip's DSC60XXB series, delivering a CMOS output over a 1.8V–3.3V supply range. The 4-VLGA package (2.50mm x 2.00mm, 0.89mm seated height) is a standard 4-pin land-grid array — the same footprint as many quartz oscillators, so a board layout already designed for a 4-pin XO often accepts this MEMS drop-in.
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27 MHz is a common clock for MCUs and CAN controllers — the ±25 ppm APR holds the frequency steady across temperature and aging, so the CAN bus bit timing stays within tolerance. Supply range 1.8V–3.3V covers both 1.8V-core processors and 3.3V peripheral buses without a level translator or extra regulator.