The DSC1121AI5-125.0038T is a MEMS-based XO (Standard) oscillator from Microchip's DSC1121 series, delivering a precise 125.0038 MHz CMOS output. Its ±10 ppm frequency stability and wide 2.25V to 3.6V supply range make it a drop-in clock source for systems requiring tight timing across industrial temperatures.
The oscillator operates from 2.25V to 3.6V, covering both 2.5V and 3.3V logic rails without an external regulator.
MEMS oscillators are inherently more resistant to vibration and shock, and they do not require external load capacitors or a feedback resistor. The 6-SMD package (7.00mm x 5.00mm, 0.90mm seated height) is a standard footprint shared by many quartz oscillators, so the PCB layout often accepts either technology without a board spin.