125 MHz LVPECL MEMS oscillator — active, production-ready
The DSC1122BE1-125.0000T is a 125 MHz MEMS-based XO (Standard) from Microchip's DSC1122 series, delivering an LVPECL output with ±50 ppm frequency stability. It operates from a 2.25V to 3.6V supply, covering both 2.5V and 3.3V rails without an extra regulator, and draws 58 mA max at 125 MHz. The MEMS resonator eliminates quartz start-up delays and is less sensitive to vibration — a practical advantage in networking switches, test equipment, and industrial controllers where the 125 MHz frequency is a common Ethernet reference clock.
The wide 2.25V–3.6V supply range means the same BOM line can serve designs with 2.5V or 3.3V core logic — no need to qualify a separate voltage variant.
Housed in a 6-SMD, No Lead package measuring 5.00mm x 3.20mm with a seated height of 0.90mm — a standard footprint that matches many quartz oscillator pads.