What this multiplexer is and where it fits
The 54F153LMQB is a multiplexer from the F/FAST series, described as MULTIPLEXER, F/FAST SERIES.
Active status and what it means for your BOM
This part is listed as active, so there is no LTB or EOL window to plan around. It remains a legitimate choice for sustaining production on existing designs, though the RoHS non-compliant status means it cannot be used in new builds that require lead-free assembly. For RoHS-exempt military, aerospace, or high-rel applications that still specify tin-lead solder, the 54F153LMQB is a clean fit.
Bulk packaging — handling note
not on tape-and-reel. That is typical for through-hole DIP parts going into panel or bench assembly. Plan for tube or anti-static tray handling on the pick-and-place if you are running a mixed-technology line; otherwise, manual insertion is straightforward.