Why this oscillator is on your BOM
The DSC1001CI2-028.3220T is a MEMS-based XO (Standard) that delivers a 28.322 MHz CMOS clock output from a 1.8V to 3.3V supply rail. Its ±25 ppm frequency stability covers most CAN, Ethernet, and MCU timing budgets without requiring a tighter ±10 ppm grade.
For a module that will see engine-bay heat or cold-soak, this qualification removes the need for separate component-level qualification by the OEM.
The 4-SMD, No Lead package measures 3.20 mm x 2.50 mm with a seated height of 0.90 mm max. The MEMS die eliminates the quartz crystal's mechanical resonance sensitivity, so the oscillator tolerates vibration and shock better than a traditional crystal-based XO in the same footprint.
The MEMS architecture means the part is not subject to the same supply constraints as quartz-based oscillators—Microchip runs its own MEMS fab, which typically offers better lead-time stability than quartz suppliers.