What this dual-output MEMS XO replaces on the BOM
The DSC6121JI3B-01VKT: That replaces two separate crystal oscillators and their associated load caps, freeing up board area on space-constrained designs like IoT modules, portable instruments, or compact control boards.
For applications requiring better than ±20 ppm, consider the ±10 ppm variant in the same DSC61XXB family.
Package, footprint, and assembly considerations
The four terminals are on the bottom — no side leads — so the PCB footprint is a simple 2x2 array of pads. Standard reflow soldering applies; the MSL (Moisture Sensitivity Level) is typically Level 1 for MEMS oscillators from Microchip, meaning no bake required before assembly. Supplied in Tape & Reel packaging, it is ready for automated pick-and-place. The reel quantity (typically 3000 pcs per reel) affects procurement MOQ — confirm the reel count with your distributor when quoting.