The DSC6003HI3B-027.0000T is a 27 MHz fixed-frequency XO from Microchip's DSC60XXB family, built on a MEMS resonator with CMOS output — it replaces a quartz crystal plus load capacitors in a single 1.6x1.2 mm package. Rated AEC-Q100, the oscillator operates from -40 to 85°C and accepts a supply range of 1.8 V to 3.3 V, covering automotive cabin and industrial environments without a separate voltage regulator.
Layout and supply considerations
The 4-VFLGA package measures 1.60 mm x 1.20 mm with a seated height of 0.89 mm — the small land pattern requires a well-defined solder-paste stencil aperture to avoid bridging; a 4-layer board with a solid ground plane under the package keeps the supply clean. Supply current is 1.3 mA typical at 27 MHz — the low draw means the oscillator can share a 1.8 V rail with the core logic without thermal concern, even in a sealed enclosure. The absolute pull range is ±20 ppm — this is a fixed-frequency XO, not a VCXO, so the output stays within 20 ppm of 27 MHz over voltage and temperature without external tuning.