24 MHz MEMS oscillator with military temperature range
That means it survives the cold soak in an avionics bay and the heat soak next to an engine block — the same part works in both, which simplifies BOM consolidation for mixed-environment builds. AEC-Q100 qualification adds the automotive reliability stress suite: extended temperature cycling, ESD tolerance, and lot traceability. If the board goes into a chassis-domain ECU or an under-hood sensor module, this grade gives the OEM the PPAP paperwork they need.
Microchip lists the DSC1121CM5-024.0000T as Obsolete. The 6-SMD no-lead footprint is common across the DSC1121 family, so a pin-compatible sibling in the same series may substitute if the frequency and stability match the BOM position. The 3.20 mm x 2.50 mm package with 0.90 mm seated height fits standard oscillator pads.
Tight ±10 ppm stability over temperature
For a 24 MHz carrier, that is a maximum deviation of ±240 Hz — tight enough for a CAN bus or a USB full-speed clock without external trimming. The disable current is the oscillator core still biased but the output gated off — not a true shutdown, so the power savings are modest. If the application needs a deeper sleep, a separate load switch or a dedicated low-power oscillator is the next step.