The NXP TDA18211HD/C2/S2551 is a silicon tuner IC for terrestrial television reception. It handles the RF front-end tuning in TV sets, set-top boxes, and PVRs that receive over-the-air broadcasts. The part is marked as active in the lifecycle, so it remains a current-production choice for new builds or service spares.
Lifecycle status is listed as active.
What the terrestrial tuner class means for fit
This is a silicon tuner, not a can-style module — it integrates the mixer, oscillator, and IF filtering on a single die. For a TV or STB mainboard, the footprint saves board space versus discrete front-ends. The bulk package suggests tray or tube delivery, which is typical for prototype or low-volume production runs; for high-volume reels, check the packing option with your quote.