74HC164M

{
  "schema_version": 1,
  "type": "component",
  "slug": "74hc164m",
  "title": "74HC164M",
  "brief": "HGSEMI Shifting Register, SOIC-14. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "logic",
    "74hc164m"
  ],
  "component": {
    "mpn": "74HC164M",
    "manufacturer": "HGSEMI",
    "package": "SOIC-14",
    "pin_count": 14,
    "category": "Logic",
    "subcategory": "Shifting Register",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/c42157c966be2f3f5c045823f7bffc69.pdf",
    "parts": {
      "symbol": "74hc164m.kicad_sym",
      "footprint": "74hc164m.kicad_mod",
      "model_3d": "74hc164m-etched.glb",
      "model_3d_plain": "74hc164m.glb",
      "model_3d_step": "74hc164m-etched.step",
      "model_3d_step_plain": "74hc164m.step",
      "lbr": "74hc164m.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "A",
        "type": "input",
        "description": "Serial data input A. Internally ANDed with input B to feed the first stage of the shift register; sampled on the rising edge of CLOCK."
      },
      {
        "number": "2",
        "name": "B",
        "type": "input",
        "description": "Serial data input B. Internally ANDed with input A to feed the first stage of the shift register; sampled on the rising edge of CLOCK."
      },
      {
        "number": "3",
        "name": "QA",
        "type": "output",
        "description": "Parallel data output stage A (first stage of the shift register)."
      },
      {
        "number": "4",
        "name": "QB",
        "type": "output",
        "description": "Parallel data output stage B."
      },
      {
        "number": "5",
        "name": "QC",
        "type": "output",
        "description": "Parallel data output stage C."
      },
      {
        "number": "6",
        "name": "QD",
        "type": "output",
        "description": "Parallel data output stage D."
      },
      {
        "number": "7",
        "name": "GND",
        "type": "power_in",
        "description": "Ground / power supply return (0 V reference)."
      },
      {
        "number": "8",
        "name": "CLOCK",
        "type": "input",
        "description": "Shift clock input. On each rising edge the eight register bits shift right one position and the A·B product is loaded into QA. Minimum pulse width 18 ns (typ)."
      },
      {
        "number": "9",
        "name": "CLEAR",
        "type": "input",
        "description": "Active-low asynchronous clear. Driving this pin low forces all outputs QA-QH to logic 0 regardless of CLOCK."
      },
      {
        "number": "10",
        "name": "QE",
        "type": "output",
        "description": "Parallel data output stage E."
      },
      {
        "number": "11",
        "name": "QF",
        "type": "output",
        "description": "Parallel data output stage F."
      },
      {
        "number": "12",
        "name": "QG",
        "type": "output",
        "description": "Parallel data output stage G."
      },
      {
        "number": "13",
        "name": "QH",
        "type": "output",
        "description": "Parallel data output stage H (last stage of the shift register; used as serial-out for cascading)."
      },
      {
        "number": "14",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply, 2.0 V to 6.0 V (absolute max 6.5 V)."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/c42157c966be2f3f5c045823f7bffc69.pdf",
        "pages": 8,
        "sha256": "c4cbc1a54be27507",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 14,
        "described": 14,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "logic": {
      "family_id": "74HC164",
      "logic_family": "74HC",
      "function_code": "164",
      "function_class": "ShiftRegister",
      "function_name": "8-Bit SIPO Shift Register",
      "manufacturer": null,
      "is_specialty": false
    },
    "models_3d": [
      {
        "file": "74hc164m.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          8.7,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "3b9a775da256c8afcc28dcddfbc2eb3f266107fe61ce8446d96f2c52b6f44a70",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "74hc164m-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          8.7,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "c70d73c89be01382d620d12ac397ab0c5da6cedd33ed4bb184a24e98c12bbc57",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "HGSEMI",
      "Package": "SOIC-14",
      "Category": "Logic",
      "Pins": "14"
    }
  },
  "variants": [
    {
      "mpn": "74HC164MN",
      "kind": "packaging"
    },
    {
      "mpn": "74HC164MM/TR",
      "kind": "packaging"
    },
    {
      "mpn": "74HC164MMT/TR",
      "kind": "packaging"
    },
    {
      "mpn": "74HC164MLQ/TR",
      "kind": "packaging"
    }
  ],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "74hc164m"
  ],
  "discovery_pitch": "74HC164M (HGSEMI) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "74hc164m.kicad_sym",
    "74hc164m.kicad_mod",
    "74hc164m.glb",
    "74hc164m.step",
    "74hc164m.lbr",
    "docs/hero.png",
    "docs/74hc164m-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "updated_at": "2026-09-24T14:54:21.996Z"
}