27 MHz MEMS XO with CMOS output — industrial temp, wide supply
The DSC1101AI2-027.0000T: Its 2.25V to 3.6V supply range covers 2.5V and 3.3V logic rails without an extra regulator — one less line item on the BOM. The MEMS resonator gives this part better shock and vibration tolerance than a quartz crystal oscillator, and start-up is typically under 5 ms — useful for equipment that cycles power or sees mechanical stress on the factory floor.
Standby function and disable current
A Standby (Power Down) pin drops the supply current to 95 µA max when the output is not needed — the oscillator stops and the CMOS output goes high-impedance. This is a straight power-save hook for battery-powered or duty-cycled systems.