Supply voltage spans 2.25 V to 3.6 V — a single rail covers 2.5 V and 3.3 V logic families, so the same BOM line works across boards with different core voltages.
Standby power-down for duty-cycled designs
For a battery-powered sensor that sleeps 99 % of the time, that 95 µA standby current is the dominant quiescent load after the MCU deep-sleep current.
The no-lead package reflows with a standard lead-free profile; the MEMS resonator inside is less sensitive to reflow shock than a quartz crystal.