The DSC1001BE2-027.0000C is a 27 MHz MEMS-based XO (standard oscillator) from Microchip's DSC1001 series, delivering CMOS output with ±25 ppm frequency stability across a 1.8V–3.3V supply range.
Supply voltage and frequency stability for BOM fit
The 1.8V–3.3V operating range covers both 3.3V peripheral buses and 1.8V core rails — no external level translator needed when the oscillator feeds a 1.8V MCU or FPGA clock input. ±25 ppm frequency stability keeps the 27 MHz reference within tight tolerance for Ethernet PHY and USB controller PLLs, which typically require ±50 ppm or better across temperature.