Quad 156.25 MHz HCSL clock generator
The DSC400-4444Q0031KE1T is a MEMS-based XO (standard) from Microchip's DSC400 series, delivering four identical 156.25 MHz outputs in HCSL logic levels — a direct fit for PCIe Gen3 reference clock trees that require four copies of the same frequency. Housed in a 20-VFQFN exposed-pad package measuring 5.00 mm x 3.20 mm with a 0.90 mm profile, it suits dense line cards and switch designs where board height is constrained.
Supply range and enable control
Wide supply range of 2.25 V to 3.6 V covers common 2.5 V and 3.3 V rails without an external regulator, simplifying power distribution on multi-voltage boards.