74HC166PW

{
  "slug": "74hc166pw",
  "version": "0.1.0",
  "type": "component",
  "description": "Nexperia Shift Registers, TSSOP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "logic",
    "74hc166pw",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "74hc166pw.kicad_sym",
    "74hc166pw.kicad_mod",
    "74hc166pw.glb",
    "74hc166pw.step",
    "74hc166pw.lbr",
    "docs/hero.png",
    "docs/74hc166pw-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "74hc166pw-hero.glb",
    "74hc166pw-hero.overlay.json",
    "74hc166pw-etched.glb"
  ],
  "component": {
    "mpn": "74HC166PW",
    "manufacturer": "Nexperia",
    "package": "TSSOP-16",
    "pin_count": 16,
    "category": "Logic",
    "subcategory": "Shift Registers",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588908009615056896",
    "parts": {
      "symbol": "74hc166pw.kicad_sym",
      "footprint": "74hc166pw.kicad_mod",
      "model_3d": "74hc166pw-hero.glb",
      "model_3d_plain": "74hc166pw-etched.glb",
      "model_3d_step": "74hc166pw-etched.step",
      "model_3d_step_plain": "74hc166pw.step",
      "lbr": "74hc166pw.lbr"
    },
    "distributor_links": {
      "lcsc": "C546649"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T07:37:45Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "DS",
        "type": "input",
        "description": "Serial data input; data enters the register serially at DS on each LOW-to-HIGH CP transition when PE is HIGH."
      },
      {
        "number": "2",
        "name": "D0",
        "type": "input",
        "description": "Parallel data input D0, loaded into the register on the LOW-to-HIGH CP transition when PE is LOW."
      },
      {
        "number": "3",
        "name": "D1",
        "type": "input",
        "description": "Parallel data input D1, loaded into the register on the LOW-to-HIGH CP transition when PE is LOW."
      },
      {
        "number": "4",
        "name": "D2",
        "type": "input",
        "description": "Parallel data input D2, loaded into the register on the LOW-to-HIGH CP transition when PE is LOW."
      },
      {
        "number": "5",
        "name": "D3",
        "type": "input",
        "description": "Parallel data input D3, loaded into the register on the LOW-to-HIGH CP transition when PE is LOW."
      },
      {
        "number": "6",
        "name": "CE",
        "type": "input",
        "description": "Clock enable input, active LOW; data shifts on LOW-to-HIGH CP transitions while CE is LOW, and a HIGH on CE disables the CP input."
      },
      {
        "number": "7",
        "name": "CP",
        "type": "input",
        "description": "Clock input, LOW-to-HIGH edge-triggered; drives the parallel load and serial shift operations."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Ground (0 V) reference for all voltages."
      },
      {
        "number": "9",
        "name": "MR",
        "type": "input",
        "description": "Asynchronous master reset, active LOW; clears the register independently of the clock."
      },
      {
        "number": "10",
        "name": "D4",
        "type": "input",
        "description": "Parallel data input D4, loaded into the register on the LOW-to-HIGH CP transition when PE is LOW."
      },
      {
        "number": "11",
        "name": "D5",
        "type": "input",
        "description": "Parallel data input D5, loaded into the register on the LOW-to-HIGH CP transition when PE is LOW."
      },
      {
        "number": "12",
        "name": "D6",
        "type": "input",
        "description": "Parallel data input D6, loaded into the register on the LOW-to-HIGH CP transition when PE is LOW."
      },
      {
        "number": "13",
        "name": "Q7",
        "type": "output",
        "description": "Serial output from the last stage of the 8-bit shift register."
      },
      {
        "number": "14",
        "name": "D7",
        "type": "input",
        "description": "Parallel data input D7, loaded into the register on the LOW-to-HIGH CP transition when PE is LOW."
      },
      {
        "number": "15",
        "name": "PE",
        "type": "input",
        "description": "Parallel enable input, active LOW; LOW loads D0 to D7 on the next CP LOW-to-HIGH transition and HIGH selects serial entry at DS."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply voltage; recommended 2.0 V to 6.0 V for 74HC166 and 4.5 V to 5.5 V for 74HCT166."
      }
    ],
    "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": [],
        "pages_sent": 17,
        "cost_usd": 0.0862,
        "at": "2026-10-18T07:36:29"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588908009615056896",
        "pages": 17,
        "sha256": "eaa7369d88204bc2",
        "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": "74hc166pw.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": "74hc166pw-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          5.0,
          1.1
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "9828b84501c569b092bba4679d840141a7f2ad5b466418fe483a2fedd35f4d27",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}