MEMS oscillator with dual LVPECL clock outputs
The DSC400-0202Q0108KI2T is a MEMS-based XO (Standard) from Microchip's DSC400 series, delivering two fixed LVPECL output frequencies: 167.1875 MHz and 173.28125 MHz.
The supply voltage spans 2.25 V to 3.6 V, allowing the same BOM line to run from a 2.5 V or 3.3 V rail without a separate regulator or level translator.
Housed in a 20-VFQFN with exposed pad (5.00 mm x 3.20 mm, 0.90 mm height), the DSC400-0202Q0108KI2T requires a thermal pad on the PCB for both heat sinking and electrical ground — a missing or poorly soldered pad can raise the junction temperature and degrade the LVPECL output swing at the far end of a 50-ohm trace. The 0.035-inch (0.90 mm) height keeps it compatible with standard 1.6 mm PCB stack-ups and mezzanine card spacing where clearance is tight.