SN74HC4020N

{
  "slug": "sn74hc4020n",
  "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 ics",
    "sn74hc4020n",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "sn74hc4020n.kicad_sym",
    "sn74hc4020n.kicad_mod",
    "sn74hc4020n.glb",
    "sn74hc4020n.step",
    "sn74hc4020n.lbr",
    "docs/hero.png",
    "docs/sn74hc4020n-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "sn74hc4020n-hero.glb",
    "sn74hc4020n-hero.overlay.json",
    "sn74hc4020n-etched.glb"
  ],
  "component": {
    "mpn": "SN74HC4020N",
    "manufacturer": "Texas Instruments",
    "package": "PDIP-16",
    "pin_count": 16,
    "category": "Logic ICs",
    "subcategory": "Counters / Dividers",
    "datasheet": "https://www.ti.com/lit/ds/symlink/sn74hc4020.pdf",
    "parts": {
      "symbol": "sn74hc4020n.kicad_sym",
      "footprint": "sn74hc4020n.kicad_mod",
      "model_3d": "sn74hc4020n-hero.glb",
      "model_3d_plain": "sn74hc4020n-etched.glb",
      "model_3d_step": "sn74hc4020n-etched.step",
      "model_3d_step_plain": "sn74hc4020n.step",
      "lbr": "sn74hc4020n.lbr"
    },
    "distributor_links": {
      "lcsc": "C1523320",
      "digikey": "2156-SN74HC4020N-ND",
      "mouser": "595-SN74HC4020N"
    },
    "distributor_check": {
      "checked_at": "2026-10-30T16:02:46Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "2156-SN74HC4020N-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "595-SN74HC4020N",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "QL",
        "type": "output",
        "description": "Counter output QL (stage 12 of the 14-stage ripple counter), driving up to 10 LSTTL loads with ±4 mA drive at 5 V."
      },
      {
        "number": "2",
        "name": "QM",
        "type": "output",
        "description": "Counter output QM (stage 13 of the 14-stage ripple counter), driving up to 10 LSTTL loads with ±4 mA drive at 5 V."
      },
      {
        "number": "3",
        "name": "QN",
        "type": "output",
        "description": "Counter output QN (stage 14, last stage of the ripple counter), driving up to 10 LSTTL loads with ±4 mA drive at 5 V."
      },
      {
        "number": "4",
        "name": "QF",
        "type": "output",
        "description": "Counter output QF, driving up to 10 LSTTL loads with ±4 mA drive at 5 V."
      },
      {
        "number": "5",
        "name": "QE",
        "type": "output",
        "description": "Counter output QE, driving up to 10 LSTTL loads with ±4 mA drive at 5 V."
      },
      {
        "number": "6",
        "name": "QG",
        "type": "output",
        "description": "Counter output QG, driving up to 10 LSTTL loads with ±4 mA drive at 5 V."
      },
      {
        "number": "7",
        "name": "QD",
        "type": "output",
        "description": "Counter output QD, driving up to 10 LSTTL loads with ±4 mA drive at 5 V."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for the device."
      },
      {
        "number": "9",
        "name": "QA",
        "type": "output",
        "description": "Counter output QA (first stage), driving up to 10 LSTTL loads with ±4 mA drive at 5 V."
      },
      {
        "number": "10",
        "name": "CLK",
        "type": "input",
        "description": "Clock input; the counter advances on the negative-going (falling) edge of the clock pulse."
      },
      {
        "number": "11",
        "name": "CLR",
        "type": "input",
        "description": "Clear input; when high it resets all outputs low independently of the clock."
      },
      {
        "number": "12",
        "name": "QI",
        "type": "output",
        "description": "Counter output QI, driving up to 10 LSTTL loads with ±4 mA drive at 5 V."
      },
      {
        "number": "13",
        "name": "QH",
        "type": "output",
        "description": "Counter output QH, driving up to 10 LSTTL loads with ±4 mA drive at 5 V."
      },
      {
        "number": "14",
        "name": "QJ",
        "type": "output",
        "description": "Counter output QJ, driving up to 10 LSTTL loads with ±4 mA drive at 5 V."
      },
      {
        "number": "15",
        "name": "QK",
        "type": "output",
        "description": "Counter output QK, driving up to 10 LSTTL loads with ±4 mA drive at 5 V."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage, 2 V to 6 V recommended, with a 0.1-µF bypass capacitor placed close to the pin."
      }
    ],
    "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": "text+vision",
        "consensus_model": "claude-opus-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 28,
        "cost_usd": 0.4632,
        "at": "2026-10-30T16:02:34"
      },
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/sn74hc4020.pdf",
        "pages": 28,
        "sha256": "5425977e0f81754f",
        "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": "sn74hc4020n.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": "2026-10-30",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "sn74hc4020n-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": "e7483025fa9bb6acf90640fcaa8578798f61c9b12701b57e25c53c62dc2948a1",
        "checked": "2026-10-30",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}