What this oscillator does on the board
The DSC6001JI1A-013.5212 is a MEMS-based XO (Standard) oscillator delivering a fixed 13.5212 MHz CMOS clock output from a 1.71 V to 3.63 V supply rail.
Sourcing an obsolete MEMS oscillator
If a design-in is still in progress, consider a current-production MEMS oscillator from the DSC60XX family with the same 2.50 mm x 2.00 mm footprint and 1.71 V–3.63 V supply range, but confirm the output frequency and Enable/Disable logic polarity match your schematic.
The 4-SMD, No Lead package measures 2.50 mm x 2.00 mm with a seated height of 0.89 mm — a compact footprint that suits space-constrained automotive ECUs or portable instrumentation. Frequency stability is ±50 ppm over the full -40°C to 85°C range, which keeps the 13.5212 MHz clock within tight tolerance for CAN, LIN, or USB interfaces that require a precise reference.