Supply voltage spans 1.8V to 3.3V, so the same oscillator can be used across a 1.8V MCU core and a 3.3V peripheral bus without a second timing device.
Standby power-down for battery-sensitive nodes
That is the oscillator's own draw — the MEMS resonator stops, the output goes high-impedance, and the load on the supply rail is negligible. For an automotive ECU that sleeps between CAN wake-up cycles, this standby current avoids draining the battery over extended parked periods. A short trace to the clock input keeps the edge rates clean and the supply draw near the datasheet figure.