FIFO depth and asynchronous access
The 74HC40105PW/S911118 is a 16-word by 4-bit asynchronous FIFO from NXP, with a 600 ns access time. That depth and speed suit moderate-rate data buffering between asynchronous clock domains — think UART-to-parallel or slow sensor readout — where the 16-word depth absorbs burst mismatches without overrunning the downstream logic.
NXP lists this part as Active.
