125 MHz MEMS oscillator with AEC-Q100 qualification
The DSC1121DI2-125.0000 is a 125 MHz fixed-frequency XO (Standard) oscillator from Microchip's DSC1121 series, built on a MEMS base resonator with CMOS output. The AEC-Q100 rating places it in the automotive-grade bin — suitable for under-hood or cabin electronics where vibration and temperature cycling exceed commercial oscillator limits.
This is a current-production part from Microchip, quoted to order against the BOM quantity. No official successor or cross-reference is listed; the DSC1121 series remains the active family.
Package and footprint for board layout
Housed in a 6-SMD, No Lead package measuring 2.50mm x 2.00mm x 0.90mm. The Enable/Disable function on pin 1 allows the oscillator to be tri-stated — useful for power-save modes or JTAG clock gating. Max supply current is 35 mA; disable current drops to 22 mA.