CD74HC154M

{
  "slug": "cd74hc154m",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments Signal Switches, Multiplexers, Decoders, SOIC-24-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "logic",
    "cd74hc154m",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "cd74hc154m.kicad_sym",
    "cd74hc154m.kicad_mod",
    "cd74hc154m.glb",
    "cd74hc154m.step",
    "cd74hc154m.lbr",
    "docs/hero.png",
    "docs/cd74hc154m-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "cd74hc154m-hero.glb",
    "cd74hc154m-hero.overlay.json"
  ],
  "component": {
    "mpn": "CD74HC154M",
    "manufacturer": "Texas Instruments",
    "package": "SOIC-24-300mil",
    "pin_count": 24,
    "category": "Logic",
    "subcategory": "Signal Switches, Multiplexers, Decoders",
    "datasheet": "https://www.ti.com/cn/lit/gpn/cd74hc154",
    "parts": {
      "symbol": "cd74hc154m.kicad_sym",
      "footprint": "cd74hc154m.kicad_mod",
      "model_3d": "cd74hc154m-hero.glb",
      "model_3d_plain": "cd74hc154m.glb",
      "model_3d_step": "cd74hc154m-etched.step",
      "model_3d_step_plain": "cd74hc154m.step",
      "lbr": "cd74hc154m.lbr"
    },
    "distributor_links": {
      "lcsc": "C1547087",
      "digikey": "296-9182-5-ND",
      "mouser": "595-CD74HC154M"
    },
    "distributor_check": {
      "checked_at": "2026-10-08T15:38:47Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-9182-5-ND",
        "status": "found",
        "lifecycle": "Obsolete"
      },
      "mouser": {
        "pn": "595-CD74HC154M",
        "status": "found",
        "lifecycle": "Obsolete"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "Y0",
        "type": "output",
        "description": "Active-low decoded output 0, driven low when address A3-A0 = 0000 and both enables are low."
      },
      {
        "number": "2",
        "name": "Y1",
        "type": "output",
        "description": "Active-low decoded output 1, driven low when address A3-A0 = 0001 and both enables are low."
      },
      {
        "number": "3",
        "name": "Y2",
        "type": "output",
        "description": "Active-low decoded output 2, driven low when address A3-A0 = 0010 and both enables are low."
      },
      {
        "number": "4",
        "name": "Y3",
        "type": "output",
        "description": "Active-low decoded output 3, driven low when address A3-A0 = 0011 and both enables are low."
      },
      {
        "number": "5",
        "name": "Y4",
        "type": "output",
        "description": "Active-low decoded output 4, driven low when address A3-A0 = 0100 and both enables are low."
      },
      {
        "number": "6",
        "name": "Y5",
        "type": "output",
        "description": "Active-low decoded output 5, driven low when address A3-A0 = 0101 and both enables are low."
      },
      {
        "number": "7",
        "name": "Y6",
        "type": "output",
        "description": "Active-low decoded output 6, driven low when address A3-A0 = 0110 and both enables are low."
      },
      {
        "number": "8",
        "name": "Y7",
        "type": "output",
        "description": "Active-low decoded output 7, driven low when address A3-A0 = 0111 and both enables are low."
      },
      {
        "number": "9",
        "name": "Y8",
        "type": "output",
        "description": "Active-low decoded output 8, driven low when address A3-A0 = 1000 and both enables are low."
      },
      {
        "number": "10",
        "name": "Y9",
        "type": "output",
        "description": "Active-low decoded output 9, driven low when address A3-A0 = 1001 and both enables are low."
      },
      {
        "number": "11",
        "name": "Y10",
        "type": "output",
        "description": "Active-low decoded output 10, driven low when address A3-A0 = 1010 and both enables are low."
      },
      {
        "number": "12",
        "name": "GND",
        "type": "power_in",
        "description": "Ground (0 V) reference pin."
      },
      {
        "number": "13",
        "name": "Y11",
        "type": "output",
        "description": "Active-low decoded output 11, driven low when address A3-A0 = 1011 and both enables are low."
      },
      {
        "number": "14",
        "name": "Y12",
        "type": "output",
        "description": "Active-low decoded output 12, driven low when address A3-A0 = 1100 and both enables are low."
      },
      {
        "number": "15",
        "name": "Y13",
        "type": "output",
        "description": "Active-low decoded output 13, driven low when address A3-A0 = 1101 and both enables are low."
      },
      {
        "number": "16",
        "name": "Y14",
        "type": "output",
        "description": "Active-low decoded output 14, driven low when address A3-A0 = 1110 and both enables are low."
      },
      {
        "number": "17",
        "name": "Y15",
        "type": "output",
        "description": "Active-low decoded output 15, driven low when address A3-A0 = 1111 and both enables are low."
      },
      {
        "number": "18",
        "name": "E1",
        "type": "input",
        "description": "Enable input 1; a high level forces all outputs high, and it can serve as the data input for demultiplexing while E2 is held low."
      },
      {
        "number": "19",
        "name": "E2",
        "type": "input",
        "description": "Enable input 2; a high level forces all outputs high, and it can serve as the data input for demultiplexing while E1 is held low."
      },
      {
        "number": "20",
        "name": "A3",
        "type": "input",
        "description": "Address select input A3 (most significant bit) selecting one of outputs Y0 to Y15."
      },
      {
        "number": "21",
        "name": "A2",
        "type": "input",
        "description": "Address select input A2 selecting one of outputs Y0 to Y15."
      },
      {
        "number": "22",
        "name": "A1",
        "type": "input",
        "description": "Address select input A1 selecting one of outputs Y0 to Y15."
      },
      {
        "number": "23",
        "name": "A0",
        "type": "input",
        "description": "Address select input A0 (least significant bit) selecting one of outputs Y0 to Y15."
      },
      {
        "number": "24",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply; 2V to 6V for HC types, with absolute maximum of 7V."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The pinout text is scrambled in extraction. Pins 13–24 were mapped by reversing the TOP VIEW label o; The mechanical drawing in the text (MCDI004A) is for the CERDIP J package, not the SOIC. The SOIC bo; The TI package addendum lists CD74HC154M (the MPN requested) as Obsolete with no orderable quantity."
        ],
        "pages_sent": 14,
        "cost_usd": 0.0775,
        "at": "2026-10-08T15:38:30"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/cd74hc154",
        "pages": 14,
        "sha256": "280e5cce6eb56861",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 24,
        "described": 24,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "cd74hc154m.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          10.3,
          15.4,
          2.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "4b0d20f82f5b0124fecfe11c941274a3c865a30f7baee8b8fadd7df55972d4cd",
        "checked": "2026-10-08",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "cd74hc154m-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          10.3,
          15.4,
          2.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "90897f878e37ea5077aa10979426c1c7912114b3785ed36927c397813537e2f1",
        "checked": "2026-10-08",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}