The DSC1101NL3-PROG is a MEMS-based XO (Standard) from Microchip's DSC1101 series, delivering a CMOS output across a programmable frequency range of 3.3 MHz to 170 MHz. Its wide supply voltage tolerance of 2.25V to 3.6V means it can run directly off a 2.5V or 3.3V rail without an extra LDO — a clean clock tree for a mixed-voltage board.
Programming — the part arrives blank
This is a blank (user-programmable) device, not a fixed-frequency oscillator. You program the target frequency using Microchip's TimeFlash field programmer or the factory programming service before the part goes onto the board. The 6-VDFN package footprint is standard for the DSC1101 family, so a pre-programmed fixed-frequency sibling can drop into the same layout if the BOM later consolidates to a single frequency.