MEMS oscillator with four independent clock outputs
The DSC400-1133Q0079KI1 is a MEMS-based XO (Standard) from Microchip's DSC400 series, delivering four pre-programmed output frequencies: 100 MHz, 100 MHz, 66.666 MHz, and 25 MHz. Outputs are selectable between LVCMOS and LVDS logic levels, with an Enable/Disable function on each channel — useful for gating clocks during system sleep states without an external load switch.
Supply voltage spans 2.25 V to 3.6 V — it runs from a 3.3 V or 2.5 V rail without an extra regulator, and the wide tolerance absorbs ripple from a switching supply.
Frequency stability and package footprint
The 20-VFQFN exposed-pad package (5.00 mm x 3.20 mm, 0.90 mm height) requires a thermal via array under the centre pad for heat sinking; the small footprint frees board area for other routing.