It outputs CMOS logic levels and operates from a 1.8V supply rail, drawing just 3 mA typ during active operation.
Microchip lists the DSC1018DI1-012.0000T as Obsolete. Available through independent surplus and broker channels in lot-specific quantities. The 4-SMD, No Lead package is small (2.50mm x 2.00mm) and the laser marking should be clean and consistent — any re-marked or sanded units warrant decap/X-ray verification before accepting into a BOM. For new designs, consider a current-production MEMS XO from Microchip's DSC1000 or DSC6000 series with similar frequency, supply voltage, and package footprint. Confirm pin compatibility and electrical specifications against the original datasheet before substituting.
Package and mounting note
The 4-SMD, No Lead package measures 2.50mm x 2.00mm with a seated height of 0.90mm. No leads means the pads are flush with the package bottom — the PCB land pattern must match the recommended footprint from the datasheet to avoid solder bridging or open joints.