MC74AC4040DR2G

{
  "slug": "mc74ac4040dr2g",
  "version": "0.1.0",
  "type": "component",
  "description": "onsemi Counters, Dividers, SOIC-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "logic",
    "mc74ac4040dr2g",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "mc74ac4040dr2g.kicad_sym",
    "mc74ac4040dr2g.kicad_mod",
    "mc74ac4040dr2g.glb",
    "mc74ac4040dr2g.step",
    "mc74ac4040dr2g.lbr",
    "docs/hero.png",
    "docs/mc74ac4040dr2g-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "mc74ac4040dr2g-hero.glb",
    "mc74ac4040dr2g-hero.overlay.json",
    "mc74ac4040dr2g-etched.glb"
  ],
  "component": {
    "mpn": "MC74AC4040DR2G",
    "manufacturer": "onsemi",
    "package": "SOIC-16",
    "pin_count": 16,
    "category": "Logic",
    "subcategory": "Counters, Dividers",
    "datasheet": "https://www.onsemi.com/pdf/datasheet/mc74ac4040-d.pdf",
    "parts": {
      "symbol": "mc74ac4040dr2g.kicad_sym",
      "footprint": "mc74ac4040dr2g.kicad_mod",
      "model_3d": "mc74ac4040dr2g-hero.glb",
      "model_3d_plain": "mc74ac4040dr2g-etched.glb",
      "model_3d_step": "mc74ac4040dr2g-etched.step",
      "model_3d_step_plain": "mc74ac4040dr2g.step",
      "lbr": "mc74ac4040dr2g.lbr"
    },
    "distributor_links": {
      "lcsc": "C903983",
      "digikey": "MC74AC4040DR2GOSTR-ND",
      "mouser": "863-MC74AC4040DR2G"
    },
    "distributor_check": {
      "checked_at": "2026-10-27T22:06:47Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "MC74AC4040DR2GOSTR-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "863-MC74AC4040DR2G",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "Q12",
        "type": "output",
        "description": "Stage 12 binary ripple counter output, half the frequency of Q11; outputs source/sink 24 mA."
      },
      {
        "number": "2",
        "name": "Q6",
        "type": "output",
        "description": "Stage 6 binary ripple counter output, half the frequency of Q5; outputs source/sink 24 mA."
      },
      {
        "number": "3",
        "name": "Q5",
        "type": "output",
        "description": "Stage 5 binary ripple counter output, half the frequency of Q4; outputs source/sink 24 mA."
      },
      {
        "number": "4",
        "name": "Q7",
        "type": "output",
        "description": "Stage 7 binary ripple counter output, half the frequency of Q6; outputs source/sink 24 mA."
      },
      {
        "number": "5",
        "name": "Q4",
        "type": "output",
        "description": "Stage 4 binary ripple counter output, half the frequency of Q3; outputs source/sink 24 mA."
      },
      {
        "number": "6",
        "name": "Q3",
        "type": "output",
        "description": "Stage 3 binary ripple counter output, half the frequency of Q2; outputs source/sink 24 mA."
      },
      {
        "number": "7",
        "name": "Q2",
        "type": "output",
        "description": "Stage 2 binary ripple counter output, half the frequency of Q1; outputs source/sink 24 mA."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for the device; all voltages are referenced to this pin."
      },
      {
        "number": "9",
        "name": "Q1",
        "type": "output",
        "description": "Stage 1 binary ripple counter output, half the clock frequency; outputs source/sink 24 mA."
      },
      {
        "number": "10",
        "name": "CLK",
        "type": "input",
        "description": "Clock input; the counter advances on the negative-going edge of this input."
      },
      {
        "number": "11",
        "name": "RESET",
        "type": "input",
        "description": "Asynchronous active-high reset; a high level forces all Q outputs low."
      },
      {
        "number": "12",
        "name": "Q9",
        "type": "output",
        "description": "Stage 9 binary ripple counter output, half the frequency of Q8; outputs source/sink 24 mA."
      },
      {
        "number": "13",
        "name": "Q8",
        "type": "output",
        "description": "Stage 8 binary ripple counter output, half the frequency of Q7; outputs source/sink 24 mA."
      },
      {
        "number": "14",
        "name": "Q10",
        "type": "output",
        "description": "Stage 10 binary ripple counter output, half the frequency of Q9; outputs source/sink 24 mA."
      },
      {
        "number": "15",
        "name": "Q11",
        "type": "output",
        "description": "Stage 11 binary ripple counter output, half the frequency of Q10; outputs source/sink 24 mA."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply; operating voltage range 2.0 V to 6.0 V referenced to GND."
      }
    ],
    "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 16-lead pin assignment was read from the garbled text of the Figure 1 top view and cross-checked"
        ],
        "pages_sent": 7,
        "cost_usd": 0.0494,
        "at": "2026-10-27T22:06:32"
      },
      "datasheet": {
        "url": "https://www.onsemi.com/pdf/datasheet/mc74ac4040-d.pdf",
        "pages": 7,
        "sha256": "cc16d5e989314d53",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 16,
        "described": 16,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "mc74ac4040dr2g.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          9.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "d5eeddb4c0b304dc61950919b126fc61d7586abd5f16ab71a2a79759ec6498bf",
        "checked": "2026-10-27",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "mc74ac4040dr2g-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          9.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "852d17a623c4150a38eba1ac3584b8da374b330e74adbef3a6956cc0f884b342",
        "checked": "2026-10-27",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}