74HC164D

{
  "slug": "74hc164d",
  "version": "0.2.1",
  "type": "component",
  "description": "Shenzhen Fuman Elec Shifting Register, SOP-14. Datasheet-verified pinout, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "logic",
    "74hc164d"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "74hc164d.kicad_sym",
    "74hc164d.kicad_mod",
    "74hc164d.glb",
    "74hc164d.step",
    "74hc164d-etched.step",
    "74hc164d.lbr",
    "docs/hero.png",
    "docs/74hc164d-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "pads.json",
    "74hc164d-hero.glb",
    "74hc164d-hero.overlay.json"
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  "component": {
    "mpn": "74HC164D",
    "manufacturer": "Shenzhen Fuman",
    "package": "SOP-14",
    "pin_count": 14,
    "category": "Logic",
    "subcategory": "Shifting Register",
    "datasheet": "docs/74hc164d-datasheet.pdf",
    "parts": {
      "symbol": "74hc164d.kicad_sym",
      "footprint": "74hc164d.kicad_mod",
      "model_3d": "74hc164d-hero.glb",
      "model_3d_plain": "74hc164d.glb",
      "model_3d_step": "74hc164d-etched.step",
      "model_3d_step_plain": "74hc164d.step",
      "lbr": "74hc164d.lbr"
    },
    "distributor_links": {
      "lcsc": "C86610"
    },
    "pins": [
      {
        "number": "1",
        "name": "A",
        "type": "input",
        "description": "Gated serial data input A. ANDed with input B to feed the first flip-flop; a low on either A or B inhibits new data entry and forces the first stage low on the next CLK rising edge."
      },
      {
        "number": "2",
        "name": "B",
        "type": "input",
        "description": "Gated serial data input B. ANDed with input A; must be high to permit A to control the first flip-flop."
      },
      {
        "number": "3",
        "name": "QA",
        "type": "output",
        "description": "Shift register stage 1 parallel output. Updated on the rising edge of CLK."
      },
      {
        "number": "4",
        "name": "QB",
        "type": "output",
        "description": "Shift register stage 2 parallel output."
      },
      {
        "number": "5",
        "name": "QC",
        "type": "output",
        "description": "Shift register stage 3 parallel output."
      },
      {
        "number": "6",
        "name": "QD",
        "type": "output",
        "description": "Shift register stage 4 parallel output."
      },
      {
        "number": "7",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference. 0 V return for VDD."
      },
      {
        "number": "8",
        "name": "CLOCK",
        "type": "input",
        "description": "Shift clock input. Data at A/B is captured on the low-to-high transition of CLK; fmax up to ~25 MHz at VCC=4.5 V (74HC)."
      },
      {
        "number": "9",
        "name": "CLEAR",
        "type": "input",
        "description": "Asynchronous active-low master clear. When low, all Q outputs are forced low independent of CLK."
      },
      {
        "number": "10",
        "name": "QE",
        "type": "output",
        "description": "Shift register stage 5 parallel output."
      },
      {
        "number": "11",
        "name": "QF",
        "type": "output",
        "description": "Shift register stage 6 parallel output."
      },
      {
        "number": "12",
        "name": "QG",
        "type": "output",
        "description": "Shift register stage 7 parallel output."
      },
      {
        "number": "13",
        "name": "QH",
        "type": "output",
        "description": "Shift register stage 8 (final) parallel output. Typically used as the serial-out to cascade additional 74HC164 devices."
      },
      {
        "number": "14",
        "name": "VDD",
        "type": "power_in",
        "description": "Positive supply voltage. Recommended 2 V to 6 V (nominal 5 V); absolute max 7 V."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "docs/74hc164d-datasheet.pdf",
        "pages": 7,
        "sha256": "eb798fbe5be69ee3",
        "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"
    },
    "pin1": {
      "pad": "1",
      "at": [
        -2.475,
        -3.81
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "SOIC-14_3.9x8.7mm_P1.27mm@sha256:a885b619b22880c9",
      "mark": "drawn"
    },
    "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": [
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        "file": "74hc164d.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          8.7,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "3b9a775da256c8afcc28dcddfbc2eb3f266107fe61ce8446d96f2c52b6f44a70",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "74hc164d-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "d1944f984cb4b73cbc5388e8e557109d53db418f221891555715d3ef50e10359",
        "checked": "2026-10-19",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "title": "74HC164D",
  "brief": "Shenzhen Fuman Shifting Register, SOP-14. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "metadata": {
    "specs": {
      "Manufacturer": "Shenzhen Fuman",
      "Package": "SOP-14",
      "Category": "Logic",
      "Pins": "14"
    }
  },
  "discovery_triggers": [
    "74hc164d"
  ],
  "discovery_pitch": "74HC164D (Shenzhen Fuman) component page with datasheet-verified CAD.",
  "visibility": "public"
}