The DSC1121CE5-048.0000 is a Microchip MEMS-based XO (Standard) delivering a 48 MHz CMOS output with ±10 ppm frequency stability across its -20°C to +70°C operating range — tighter than a typical quartz crystal oscillator's ±25 ppm or ±50 ppm, which means the system clock jitter budget has more headroom for the downstream PLL or serial interface.
The 2.25V to 3.6V supply range covers standard 2.5V and 3.3V rails without a separate LDO — the oscillator runs directly off the same rail as the FPGA or MCU bank, simplifying the power tree. Housed in a 6-VDFN package measuring 3.20 mm x 2.50 mm with a seated height of 0.90 mm, the footprint matches the common 3.2 x 2.5 mm oscillator land pattern — a drop-in replacement for quartz oscillators in that form factor, though the MEMS die eliminates the need for a decoupling capacitor on the output.