Supply voltage flexibility and power-down standby
The part operates from a single 1.8V to 3.3V supply rail, so it can run directly off a 1.8V core rail or a 3.3V I/O rail without an extra regulator.
Package and board-fit details
Housed in a 4-SMD, no-lead package measuring 3.20 mm x 2.50 mm with a seated height of 0.90 mm — a compact footprint that fits tight PCB layouts without needing a dedicated oscillator can. Surface-mount assembly; the no-lead package means the solder joints are under the body, so the board layout needs the recommended land pattern from the datasheet to avoid tombstoning.