The DSC1001AI1-055.3330 is a MEMS-based oscillator from Microchip's DSC1001 series, delivering a 55.333 MHz CMOS clock from a silicon resonator rather than a quartz crystal.
Operates from 1.8V to 3.3V, so the same order code covers 1.8V, 2.5V, and 3.3V logic rails — no need to qualify a different oscillator per supply voltage.
Housed in a 7.00mm x 5.00mm 4-SMD package with no-lead exposed pad — the pad footprint is compatible with standard quartz oscillator layouts in the same 7x5 mm form factor. Surface-mount assembly; the 0.90 mm seated height keeps it within typical board-to-board clearance limits.