What this reference does on the board
The MAX6107EUR+T is a fixed 4.5 V series voltage reference from Maxim Integrated in a three-pin SOT-23-3 package. It delivers a clean 4.5 V rail from an input between 4.7 V and 12.6 V, drawing only 125 µA of supply current.
SOT-23-3 footprint, surface-mount only. The tape-and-reel or cut-tape options suit both high-volume pick-and-place and small-bench rework. Three pins — input, output, ground — no surprises. Check the pad layout against the SOT-23-3 land pattern in your assembly house's library.