What this 54F11LMQB does on the board
The 54F11LMQB is a triple 3-input AND gate from the 54F series, a fast bipolar logic family. It performs the logical AND of three inputs per gate, with three independent gates in one package. This is a through-hole part — loose units, not tape-and-reel — so expect to handle and store them individually or in tubes.
One important note: this part is RoHS non-compliant — it contains lead (Pb) in the solder finish. That makes it suitable for military, aerospace, and other high-reliability applications where lead-bearing finishes are required or exempted, but it cannot be used in RoHS-mandated commercial or consumer assemblies without an exemption.
Sourcing this 54F11LMQB
Because the 54F11LMQB is active and RoHS non-compliant, it is a niche part that not every distributor stocks on the shelf. If you are managing a long-life program or a repair depot that needs a steady supply of this legacy logic gate, let us quote your annual or blanket quantity — we can secure the allocation and keep the reels (or tubes) in your bin.