The DSC8121CM2: When disabled, the output goes high-impedance, not a fixed logic level — the downstream receiver should have a pull-up or pull-down to avoid a floating input.
Programmable blank — order the unprogrammed part
This is a Blank (User Must Program) variant — the device ships without a frequency programmed. You need a Microtech TimeFlash programmer or a factory-programmed version (DSC8121xx prefix) for a ready-to-use oscillator. The blank part gives flexibility for low-volume prototypes or multi-frequency BOM consolidation.
The land pattern matches the standard 6-pad footprint for MEMS oscillators in this form factor — no special via-in-pad or thermal relief required for the supply pins. Surface-mount assembly with a standard reflow profile; the MEMS die is hermetically sealed in the package, so no moisture sensitivity level (MSL) concern beyond the standard JEDEC level 1 handling.