The DSC1001DI1-100.0000: The 1.8V to 3.3V supply range lets a single BOM line serve multiple voltage domains without a level translator, simplifying the power tree.
Standby power-down and package footprint
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 footprint matches standard 2.5 x 2.0 mm MEMS oscillator land patterns — no board respin needed if migrating from a quartz XO.
Active production — no last-time-buy risk
Microchip lists the DSC1001DI1-100.0000 as Active.