Single-gate buffer for mixed-voltage bus isolation
The 74LVC1G126DBVTG4: The 3-state output lets you disconnect the buffer from a shared bus when the output enable is low, which is useful for multiplexed data lines or shared interrupt signals. The 32mA symmetric drive (both high and low) is enough to drive a handful of CMOS loads or a short PCB trace without needing a separate line driver.
The SOT-23-5 package (SC-74A, SOT-753) is a five-pin surface-mount footprint that fits tight layouts and is common across many single-gate logic parts, so the board pattern is well understood by assemblers.