74HC164

{
  "schema_version": 1,
  "type": "component",
  "slug": "74hc164",
  "title": "74HC164",
  "brief": "GR Shift Registers, SOP-14. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "logic",
    "74hc164"
  ],
  "component": {
    "mpn": "74HC164",
    "manufacturer": "GR",
    "package": "SOP-14",
    "pin_count": 14,
    "category": "Logic",
    "subcategory": "Shift Registers",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8602886336932704256",
    "parts": {
      "symbol": "74hc164.kicad_sym",
      "footprint": "74hc164.kicad_mod",
      "model_3d": "74hc164-etched.glb",
      "model_3d_plain": "74hc164.glb",
      "model_3d_step": "74hc164-etched.step",
      "model_3d_step_plain": "74hc164.step",
      "lbr": "74hc164.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "A",
        "type": "input",
        "description": "Serial data input A. AND-gated with input B to form the internal serial data (Qa = A AND B) that is clocked into the first stage on the rising edge of CLOCK."
      },
      {
        "number": "2",
        "name": "B",
        "type": "input",
        "description": "Serial data input B. AND-gated with input A; tie high if only A is used as the serial input, or use as an active-high serial enable."
      },
      {
        "number": "3",
        "name": "Qa",
        "type": "output",
        "description": "Parallel data output, first shift register stage (Q0). Follows the serial input after one clock rising edge."
      },
      {
        "number": "4",
        "name": "Qb",
        "type": "output",
        "description": "Parallel data output, second shift register stage."
      },
      {
        "number": "5",
        "name": "Qc",
        "type": "output",
        "description": "Parallel data output, third shift register stage."
      },
      {
        "number": "6",
        "name": "Qd",
        "type": "output",
        "description": "Parallel data output, fourth shift register stage."
      },
      {
        "number": "7",
        "name": "GND",
        "type": "power_in",
        "description": "Ground / 0 V reference for the device."
      },
      {
        "number": "8",
        "name": "CLEAR",
        "type": "input",
        "description": "Asynchronous active-low master reset. Driving CLEAR low forces all Qa-Qh outputs to logic 0 regardless of CLOCK. Tie high for normal shifting."
      },
      {
        "number": "9",
        "name": "CLOCK",
        "type": "input",
        "description": "Shift clock input. Rising edge shifts data one position to the right (Qa ← A·B, Qb ← Qa, … Qh ← Qg)."
      },
      {
        "number": "10",
        "name": "Qe",
        "type": "output",
        "description": "Parallel data output, fifth shift register stage."
      },
      {
        "number": "11",
        "name": "Qf",
        "type": "output",
        "description": "Parallel data output, sixth shift register stage."
      },
      {
        "number": "12",
        "name": "Qg",
        "type": "output",
        "description": "Parallel data output, seventh shift register stage."
      },
      {
        "number": "13",
        "name": "Qh",
        "type": "output",
        "description": "Parallel data output, eighth (last) shift register stage. Use as the serial-out signal when cascading multiple 74HC164 devices."
      },
      {
        "number": "14",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply, 2.0 V to 6.0 V (5 V typical). Absolute maximum 6.5 V. Bypass locally to GND with a 100 nF ceramic capacitor."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8602886336932704256",
        "pages": 5,
        "sha256": "c1b9e169b9032c0d",
        "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": "74hc164.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": "74hc164-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": "8e2d24f5dda8749df71b9d84ff8e6ff588f1854b3a1123603584dfc9726f20be",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "GR",
      "Package": "SOP-14",
      "Category": "Logic",
      "Pins": "14"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "74hc164"
  ],
  "discovery_pitch": "74HC164 (GR) 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",
    "74hc164.kicad_sym",
    "74hc164.kicad_mod",
    "74hc164.glb",
    "74hc164.step",
    "74hc164.lbr",
    "docs/hero.png",
    "docs/74hc164-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "updated_at": "2026-09-24T14:54:02.065Z"
}