CD4518BEE4

{
  "slug": "cd4518bee4",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments Counters, Dividers, PDIP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "logic",
    "cd4518bee4",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "cd4518bee4.kicad_sym",
    "cd4518bee4.kicad_mod",
    "cd4518bee4.glb",
    "cd4518bee4.step",
    "cd4518bee4.lbr",
    "docs/hero.png",
    "docs/cd4518bee4-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "cd4518bee4-hero.glb",
    "cd4518bee4-hero.overlay.json",
    "cd4518bee4-etched.glb"
  ],
  "component": {
    "mpn": "CD4518BEE4",
    "manufacturer": "Texas Instruments",
    "package": "PDIP-16",
    "pin_count": 16,
    "category": "Logic",
    "subcategory": "Counters, Dividers",
    "datasheet": "https://www.ti.com/lit/ds/symlink/cd4520b-mil.pdf",
    "parts": {
      "symbol": "cd4518bee4.kicad_sym",
      "footprint": "cd4518bee4.kicad_mod",
      "model_3d": "cd4518bee4-hero.glb",
      "model_3d_plain": "cd4518bee4-etched.glb",
      "model_3d_step": "cd4518bee4-etched.step",
      "model_3d_step_plain": "cd4518bee4.step",
      "lbr": "cd4518bee4.lbr"
    },
    "distributor_links": {
      "lcsc": "C20345281",
      "digikey": "296-CD4518BEE4-ND",
      "mouser": "595-CD4518BEE4"
    },
    "distributor_check": {
      "checked_at": "2026-10-23T12:27:12Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-CD4518BEE4-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "595-CD4518BEE4",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "CLOCK A",
        "type": "input",
        "description": "Counter A clock input, which increments the counter on a positive-going edge when ENABLE A is high; clock rise/fall time max 15 µs at 5 V and 5 µs at 10-15 V."
      },
      {
        "number": "2",
        "name": "ENABLE A",
        "type": "input",
        "description": "Counter A enable input, which increments the counter on a negative-going edge while CLOCK A is low, and is held high for single-unit operation."
      },
      {
        "number": "3",
        "name": "Q1A",
        "type": "output",
        "description": "Counter A stage 1 (first-stage) output."
      },
      {
        "number": "4",
        "name": "Q2A",
        "type": "output",
        "description": "Counter A stage 2 output."
      },
      {
        "number": "5",
        "name": "Q3A",
        "type": "output",
        "description": "Counter A stage 3 output."
      },
      {
        "number": "6",
        "name": "Q4A",
        "type": "output",
        "description": "Counter A stage 4 output, which can be connected to the ENABLE input of the next counter for ripple cascading while its CLOCK is held low."
      },
      {
        "number": "7",
        "name": "RESET A",
        "type": "input",
        "description": "Counter A reset input; a high level clears Q1 through Q4 of counter A to 0, with minimum reset pulse width 250 ns at 5 V."
      },
      {
        "number": "8",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground / negative supply terminal, the reference for all voltage ratings."
      },
      {
        "number": "9",
        "name": "CLOCK B",
        "type": "input",
        "description": "Counter B clock input, which increments the counter on a positive-going edge when ENABLE B is high."
      },
      {
        "number": "10",
        "name": "ENABLE B",
        "type": "input",
        "description": "Counter B enable input, which increments the counter on a negative-going edge while CLOCK B is low, and is held high for single-unit operation."
      },
      {
        "number": "11",
        "name": "Q1B",
        "type": "output",
        "description": "Counter B stage 1 (first-stage) output."
      },
      {
        "number": "12",
        "name": "Q2B",
        "type": "output",
        "description": "Counter B stage 2 output."
      },
      {
        "number": "13",
        "name": "Q3B",
        "type": "output",
        "description": "Counter B stage 3 output."
      },
      {
        "number": "14",
        "name": "Q4B",
        "type": "output",
        "description": "Counter B stage 4 output, which can be used for ripple cascading to another counter's ENABLE input."
      },
      {
        "number": "15",
        "name": "RESET B",
        "type": "input",
        "description": "Counter B reset input; a high level clears Q1 through Q4 of counter B to 0."
      },
      {
        "number": "16",
        "name": "VDD",
        "type": "power_in",
        "description": "Positive supply terminal, recommended 3 V to 18 V with absolute maximum of -0.5 V to +20 V referenced to VSS."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-sonnet-5-5",
        "primary_mode": "vision",
        "consensus_model": "claude-opus-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The datasheet text states the E suffix is the 16-lead plastic DIP, and I took CD4518BEE4 to be that ",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 12,
        "cost_usd": 0.1496,
        "at": "2026-10-23T12:26:58"
      },
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/cd4520b-mil.pdf",
        "pages": 21,
        "sha256": "c28162391ada6d6a",
        "source_tier": "lcsc"
      },
      "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": "cd4518bee4.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          7.874,
          19.177,
          6.98
        ],
        "zmin_mm": -3.3,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "17a30b1f0ab3fd5384a1231e3c63c394888d5b952c542a8c189e023ed3467464",
        "checked": "2026-10-23",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "cd4518bee4-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          7.874,
          19.177,
          6.98
        ],
        "zmin_mm": -3.3,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "731d63b08c60f2971ed5dc2f3774ed4c14c486ae42712f791546772fb2f54692",
        "checked": "2026-10-23",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}