What this MEMS XO delivers on the clock tree
The DSC400-0331Q0026KI2T is a MEMS-based XO (Standard) from Microchip's DSC400 series, providing three output frequencies — 25 MHz on output 1 and 125 MHz on outputs 2 and 3 — in LVCMOS or LVDS format. The ±25 ppm frequency stability holds across the full -40°C to +85°C industrial temperature range, so the clock edges stay within budget for a 25 MHz base or 125 MHz serial link without external trimming. The 20-VFQFN exposed-pad package measures 5.00 mm x 3.20 mm with a 0.90 mm seated height; the exposed pad needs a thermal via array under the centre ground pad to keep the MEMS die within its operating junction temperature.