Quad-output MEMS clock generator — 100 MHz and 156.25 MHz on four lanes
The DSC400-4444Q0038KI1 is a MEMS-based XO (Standard) that delivers four HCSL outputs: Output 1 and Output 4 each provide 100 MHz and 156.25 MHz, while Output 2 and Output 3 are fixed at 156.25 MHz. This frequency plan is common in networking and data-communications boards where a 100 MHz reference feeds the Ethernet PHY and 156.25 MHz drives the FPGA or SerDes transceiver — one device replaces two or three single-output oscillators.
Active production — no last-time-buy risk
Microchip lists the DSC400-4444Q0038KI1 as Active. The 2.25 V to 3.6 V supply range covers common 2.5 V and 3.3 V rails without an extra regulator.
20-VFQFN footprint — thermal pad and fan-out
The 5.00 mm × 3.20 mm body with 0.90 mm height fits tight card-edge profiles.