74HC4520PW

{
  "slug": "74hc4520pw",
  "version": "0.1.0",
  "type": "component",
  "description": "Nexperia Counters, Dividers, TSSOP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "logic",
    "74hc4520pw",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "74hc4520pw.kicad_sym",
    "74hc4520pw.kicad_mod",
    "74hc4520pw.glb",
    "74hc4520pw.step",
    "74hc4520pw.lbr",
    "docs/hero.png",
    "docs/74hc4520pw-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "74hc4520pw-hero.glb",
    "74hc4520pw-hero.overlay.json",
    "74hc4520pw-etched.glb"
  ],
  "component": {
    "mpn": "74HC4520PW",
    "manufacturer": "Nexperia",
    "package": "TSSOP-16",
    "pin_count": 16,
    "category": "Logic",
    "subcategory": "Counters, Dividers",
    "datasheet": "https://assets.nexperia.com/documents/data-sheet/74HC4520PW.pdf",
    "parts": {
      "symbol": "74hc4520pw.kicad_sym",
      "footprint": "74hc4520pw.kicad_mod",
      "model_3d": "74hc4520pw-hero.glb",
      "model_3d_plain": "74hc4520pw-etched.glb",
      "model_3d_step": "74hc4520pw-etched.step",
      "model_3d_step_plain": "74hc4520pw.step",
      "lbr": "74hc4520pw.lbr"
    },
    "distributor_links": {
      "lcsc": "C547072",
      "mouser": "771-74HC4520PW"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T05:21:29Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": "771-74HC4520PW",
        "status": "found",
        "lifecycle": "End of Life"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "1CP0",
        "type": "input",
        "description": "Clock input, LOW-to-HIGH edge-triggered; counter 1 advances on this rising edge when 1CP1 is HIGH."
      },
      {
        "number": "2",
        "name": "1CP1",
        "type": "input",
        "description": "Clock input, HIGH-to-LOW edge-triggered; counter 1 advances on this falling edge when 1CP0 is LOW."
      },
      {
        "number": "3",
        "name": "1Q0",
        "type": "output",
        "description": "Buffered output of bit 0 of counter 1, forced LOW by an active 1MR."
      },
      {
        "number": "4",
        "name": "1Q1",
        "type": "output",
        "description": "Buffered output of bit 1 of counter 1, forced LOW by an active 1MR."
      },
      {
        "number": "5",
        "name": "1Q2",
        "type": "output",
        "description": "Buffered output of bit 2 of counter 1, forced LOW by an active 1MR."
      },
      {
        "number": "6",
        "name": "1Q3",
        "type": "output",
        "description": "Buffered output of bit 3 of counter 1, forced LOW by an active 1MR."
      },
      {
        "number": "7",
        "name": "1MR",
        "type": "input",
        "description": "Asynchronous master reset for counter 1, active HIGH; a HIGH forces 1Q0 to 1Q3 LOW independent of the clock inputs."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Ground (0 V) reference for all voltages."
      },
      {
        "number": "9",
        "name": "2CP0",
        "type": "input",
        "description": "Clock input, LOW-to-HIGH edge-triggered; counter 2 advances on this rising edge when 2CP1 is HIGH."
      },
      {
        "number": "10",
        "name": "2CP1",
        "type": "input",
        "description": "Clock input, HIGH-to-LOW edge-triggered; counter 2 advances on this falling edge when 2CP0 is LOW."
      },
      {
        "number": "11",
        "name": "2Q0",
        "type": "output",
        "description": "Buffered output of bit 0 of counter 2, forced LOW by an active 2MR."
      },
      {
        "number": "12",
        "name": "2Q1",
        "type": "output",
        "description": "Buffered output of bit 1 of counter 2, forced LOW by an active 2MR."
      },
      {
        "number": "13",
        "name": "2Q2",
        "type": "output",
        "description": "Buffered output of bit 2 of counter 2, forced LOW by an active 2MR."
      },
      {
        "number": "14",
        "name": "2Q3",
        "type": "output",
        "description": "Buffered output of bit 3 of counter 2, forced LOW by an active 2MR."
      },
      {
        "number": "15",
        "name": "2MR",
        "type": "input",
        "description": "Asynchronous master reset for counter 2, active HIGH; a HIGH forces 2Q0 to 2Q3 LOW independent of the clock inputs."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage; recommended 2.0 V to 6.0 V for 74HC4520 and 4.5 V to 5.5 V for 74HCT4520."
      }
    ],
    "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: Pin numbers were taken from the text layout of Fig. 5 (SOT403-1 TSSOP16), which is a drawing; the la; Pin descriptions are paraphrased from Table 2 and the Section 1 functional text; the datasheet gives"
        ],
        "pages_sent": 14,
        "cost_usd": 0.0714,
        "at": "2026-10-18T05:16:02"
      },
      "datasheet": {
        "url": "https://assets.nexperia.com/documents/data-sheet/74HC4520PW.pdf",
        "pages": 14,
        "sha256": "2d8a801dc7d6b501",
        "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": "74hc4520pw.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.4,
          5.0,
          1.1
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "6ad5e98224d02a427d9a6b929a28dbc158b9925fba5adec12db05079f1016948",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "74hc4520pw-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.4,
          5.0,
          1.1
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "16521c4ad13825ca7e89161f59646e527ee0e63b5d9cee9eb21849b3a09f3e03",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}