Obsolete — sourcing reality for the BOM line
The DSC6101MI1A-033.3300T: No official successor order code is listed. For an existing BOM position that requires this exact frequency, package, and AEC-Q100 rating, the supply path is through independent distribution — surplus or new-old-stock lots with date-code and lot-traceability documentation. The laser etch on the 4-VFLGA package should be examined for font consistency with Microchip's known plant markings; a decap X-ray can verify the MEMS die structure if provenance is uncertain.
The land pattern is a 4-pad LGA — the centre pad is typically a thermal and mechanical anchor, not an electrical connection. The small footprint means the oscillator can be placed close to the load (MCU clock input), keeping the CMOS trace short and reducing radiated emissions at 33.33 MHz.