The DSC1121AM2-066.6660 is a MEMS-based XO (Standard) oscillator from Microchip's DSC1121 series, delivering a 66.666 MHz CMOS output with ±25 ppm frequency stability across the full -55°C to 125°C military temperature range. AEC-Q100 qualification means this part is validated for automotive stress conditions, making it suitable for under-hood and chassis-mounted electronics where temperature cycling and vibration are routine. The MEMS resonator inherently withstands higher shock and vibration than a quartz crystal — a practical advantage in engine bays, drivetrain modules, and industrial motor drives where quartz can fracture or drift.
Supply Voltage and Enable/Disable Function
Operating from 2.25V to 3.6V, this oscillator can be powered directly from a 2.5V or 3.3V rail without an intermediate regulator, simplifying the power tree on mixed-voltage boards. The Enable/Disable function allows the output to be tri-stated, reducing supply current to 22 mA max when the clock is not needed — useful for power-sensitive designs that gate the oscillator during sleep modes.
Package and Footprint Compatibility
Housed in a 6-SMD, No Lead Exposed Pad package measuring 7.00mm x 5.00mm with a seated height of 0.90 mm, this footprint is a standard 7050 oscillator layout, directly compatible with many existing PCB designs and sockets.