The DSC400-0101Q0083KI1 is a MEMS-based XO (Standard) oscillator from Microchip's DSC400 series, delivering two LVCMOS clock outputs at 45.1584 MHz and 49.152 MHz from a single 20-VFQFN package with an exposed pad for thermal management.
Key ratings that drive the BOM decision
Supply voltage spans 2.25V to 3.6V, so it runs from a 2.5V or 3.3V rail without a separate LDO; the Enable/Disable function lets the system shut down the oscillator for sleep modes, pulling the output into high-Z. The 20-VFQFN package measures 5.00mm x 3.20mm with a 0.90mm height — the exposed pad requires a thermal via array under the package to keep junction temperature within limits at high ambient.