The DSC1121CM1-040.0000T is a 40 MHz MEMS-based XO (Standard) from Microchip's DSC1121 series, delivering a CMOS output across a wide 2.25V to 3.6V supply range.
Supply and output flexibility
The 2.25V to 3.6V supply range lets this part run from a 2.5V or 3.3V rail without an external regulator — useful when the same BOM position must span multiple board revisions. CMOS output is compatible with most MCU and FPGA clock inputs; the Enable/Disable function (E/D) allows the oscillator to be tri-stated for system-level power gating, drawing 22mA max when disabled.
Housed in a 6-SMD, No Lead package measuring 3.20mm x 2.50mm with a seated height of 0.90mm, it fits tight-height enclosures and standard reflow profiles. Surface-mount assembly on a 2-layer board is straightforward — the small footprint leaves room for decoupling caps near the supply pins.