Four-output MEMS clock in a single 20-VFQFN
The DSC400-2222Q0105KE1 packs four independent LVPECL clock outputs — 200 MHz, 156.25 MHz, 125 MHz, and 100 MHz — from a single MEMS resonator, saving board space versus a bank of discrete oscillators. The ±50 ppm frequency stability covers most Ethernet, PCIe, and FPGA reference-clock jitter budgets without needing an external VCXO.
The exposed-pad QFN (5.00 mm x 3.20 mm, 0.90 mm height) requires a thermal via array under the pad for heat sinking; rework with hot air is feasible but the pad needs a clean stencil to avoid solder bridging on the perimeter leads.