The DSC1033CI1-027.0000T is a MEMS-based XO (standard oscillator) from Microchip's PureSilicon™ series, delivering a 27 MHz CMOS output from a 3.3V supply rail.
The 4-SMD no-lead package measures 3.20 mm x 2.50 mm — a compact footprint that fits tight PCB layouts, but the no-lead land pattern requires careful solder-paste stencil design to avoid bridging.
Microchip lists the DSC1033CI1-027.0000T as Obsolete. For existing BOM lines, quantities are available through independent surplus channels — lot-specific, confirmed at RFQ. A board spin to a current-generation MEMS oscillator (same package footprint, different order code) is the typical migration path for new designs.