Four 100/125 MHz HCSL outputs from a MEMS die
The DSC400-4444Q0059KI1T: This DSC400 variant delivers four identical clock outputs, each configurable as 100 MHz or 125 MHz with HCSL logic levels — a single part replaces four discrete XOs on a PCIe or Ethernet reference clock tree.
The 2.25V to 3.6V supply span lets you run this oscillator from a 2.5V or 3.3V rail without a dedicated LDO — handy when the only clean rail on the board is 2.5V and you need a 3.3V-compatible HCSL swing.
20-VFQFN exposed pad — layout note
The 5.00 mm x 3.20 mm body with 0.90 mm height fits a standard 20-VFQFN footprint, but the exposed pad underneath must be soldered to a copper plane with thermal vias.
Active production — no last-time-buy rush
The DSC400 base number covers multiple frequency and stability variants; confirm the full 4444Q0059KI1T suffix matches your BOM before ordering.