72 MHz MEMS oscillator for timing-constrained designs
The DSC1121DE5-072.0000T is a 72 MHz XO (Standard) from Microchip's DSC1121 series, built on a MEMS resonator instead of a quartz crystal. The MEMS die is sealed in a 6-VDFN package measuring 2.50mm x 2.00mm, making it a drop-in for space-constrained boards where a quartz can would be too tall or too wide. Output is CMOS, so it drives standard logic inputs directly without a level translator. The supply range spans 2.25V to 3.6V, covering both 2.5V and 3.3V rails without an external regulator. The Enable/Disable function lets the system gate the clock — useful for power-saving modes or test bypass. When disabled, the output goes high-impedance and the supply current drops to 22 mA max, versus 35 mA max when running.
Rated for -20°C to 70°C, this oscillator fits indoor equipment, office gear, and telecom cabinets where ambient stays above freezing. The MEMS construction gives it better shock and vibration tolerance than a quartz oscillator — a practical advantage for equipment that ships assembled or sees fan vibration. The absolute pull range is ±10 ppm, which covers the frequency accuracy needed for most 72 MHz clock trees without external trimming. For a 72 MHz reference, that is about 720 Hz of total drift across temperature and voltage.
Listed as Active by Microchip — this part is in production and available for new designs. Supplied in Tape & Reel (TR) packaging, which is the standard format for automated pick-and-place assembly.