Dual-frequency MEMS XO for high-speed clock trees
The DSC400-0202Q0109KE2 is a MEMS-based XO (Standard) from Microchip's DSC400 series, delivering two fixed LVPECL output frequencies: 153.6 MHz and 176.875 MHz. LVPECL outputs require a 50-ohm to VCC-2V termination; the 2.25-3.6 V supply range gives flexibility to run off a 2.5 V or 3.3 V rail without a separate regulator.
Microchip lists the DSC400-0202Q0109KE2 as Active.
20-VFQFN package and board-fit notes
Housed in a 20-VFQFN with an exposed pad, measuring 5.00 mm x 3.20 mm and standing 0.90 mm tall. The exposed paddle needs a thermal via array to the ground plane — without it the MEMS die's internal temperature rises above the ambient rating, pulling the frequency stability off the ±25 ppm spec.