The DSC1103CE2-168.5000: The 2.25V to 3.63V supply range lets it run directly from a 2.5V or 3.3V rail without an extra LDO – one less part on the BOM.
Housed in a 6-SMD, No Lead package measuring 3.20mm x 2.50mm with a seated height of 0.90mm – a compact footprint that fits tight board layouts and matches standard MEMS oscillator land patterns. Surface-mount mounting with no leads means the package sits flush on the PCB; rework requires a hot-air station, but the body is small enough that a standard nozzle works.