The MEMS resonator base gives faster start-up and better shock tolerance than a quartz crystal, and the 2.25V to 3.63V supply range lets it run from a 2.5V or 3.3V rail without an extra regulator.
Package and board layout note
6-SMD no-lead package measuring 5.00mm x 3.20mm with a seated height of 0.90mm — the 0.50 mm pitch pads require a standard SMD reflow profile; no via-in-pad needed.
