Four-frequency clock source in a single MEMS package
The DSC400-1111Q0081KI2T is a MEMS-based XO that delivers four independent LVCMOS clock outputs from one 20-VFQFN package: 27 MHz, 50 MHz, 25 MHz, and 12 MHz.
Supply voltage and board integration
A single 2.25 V to 3.6 V supply rail powers all four outputs, simplifying power-tree design — the same 3.3 V or 2.5 V rail that feeds the processor also runs the oscillator. The 20-VFQFN with exposed pad (5.00 mm × 3.20 mm body, 0.90 mm height) requires a thermal pad on the PCB for heat sinking; the pad should be connected to ground plane with multiple vias to keep junction temperature within the -40 °C to +85 °C operating range.