74HCT574D

{
  "slug": "74hct574d",
  "version": "0.1.0",
  "type": "component",
  "description": "Nexperia Flip Flops, SOIC-20-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "logic",
    "74hct574d",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "74hct574d.kicad_sym",
    "74hct574d.kicad_mod",
    "74hct574d.glb",
    "74hct574d.step",
    "74hct574d.lbr",
    "docs/hero.png",
    "docs/74hct574d-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "74hct574d-hero.glb",
    "74hct574d-hero.overlay.json",
    "74hct574d-etched.glb"
  ],
  "component": {
    "mpn": "74HCT574D",
    "manufacturer": "Nexperia",
    "package": "SOIC-20-300mil",
    "pin_count": 20,
    "category": "Logic",
    "subcategory": "Flip Flops",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586186961127792640",
    "parts": {
      "symbol": "74hct574d.kicad_sym",
      "footprint": "74hct574d.kicad_mod",
      "model_3d": "74hct574d-hero.glb",
      "model_3d_plain": "74hct574d-etched.glb",
      "model_3d_step": "74hct574d-etched.step",
      "model_3d_step_plain": "74hct574d.step",
      "lbr": "74hct574d.lbr"
    },
    "distributor_links": {
      "lcsc": "C6001"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T17:12:44Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "OE",
        "type": "input",
        "description": "3-state output enable input (active LOW); a HIGH on OE forces Q0 to Q7 into the high-impedance OFF-state without changing the flip-flop contents."
      },
      {
        "number": "2",
        "name": "D0",
        "type": "input",
        "description": "Data input 0 to the flip-flop, which is stored on the LOW-to-HIGH clock transition when set-up and hold times are met."
      },
      {
        "number": "3",
        "name": "D1",
        "type": "input",
        "description": "Data input 1 to the flip-flop, which is stored on the LOW-to-HIGH clock transition when set-up and hold times are met."
      },
      {
        "number": "4",
        "name": "D2",
        "type": "input",
        "description": "Data input 2 to the flip-flop, which is stored on the LOW-to-HIGH clock transition when set-up and hold times are met."
      },
      {
        "number": "5",
        "name": "D3",
        "type": "input",
        "description": "Data input 3 to the flip-flop, which is stored on the LOW-to-HIGH clock transition when set-up and hold times are met."
      },
      {
        "number": "6",
        "name": "D4",
        "type": "input",
        "description": "Data input 4 to the flip-flop, which is stored on the LOW-to-HIGH clock transition when set-up and hold times are met."
      },
      {
        "number": "7",
        "name": "D5",
        "type": "input",
        "description": "Data input 5 to the flip-flop, which is stored on the LOW-to-HIGH clock transition when set-up and hold times are met."
      },
      {
        "number": "8",
        "name": "D6",
        "type": "input",
        "description": "Data input 6 to the flip-flop, which is stored on the LOW-to-HIGH clock transition when set-up and hold times are met."
      },
      {
        "number": "9",
        "name": "D7",
        "type": "input",
        "description": "Data input 7 to the flip-flop, which is stored on the LOW-to-HIGH clock transition when set-up and hold times are met."
      },
      {
        "number": "10",
        "name": "GND",
        "type": "power_in",
        "description": "Ground (0 V) reference for all voltages on the device."
      },
      {
        "number": "11",
        "name": "CP",
        "type": "input",
        "description": "Clock input; the flip-flops capture the D inputs on the LOW-to-HIGH (positive edge) transition."
      },
      {
        "number": "12",
        "name": "Q7",
        "type": "tri_state",
        "description": "3-state flip-flop output 7, high-impedance when OE is HIGH."
      },
      {
        "number": "13",
        "name": "Q6",
        "type": "tri_state",
        "description": "3-state flip-flop output 6, high-impedance when OE is HIGH."
      },
      {
        "number": "14",
        "name": "Q5",
        "type": "tri_state",
        "description": "3-state flip-flop output 5, high-impedance when OE is HIGH."
      },
      {
        "number": "15",
        "name": "Q4",
        "type": "tri_state",
        "description": "3-state flip-flop output 4, high-impedance when OE is HIGH."
      },
      {
        "number": "16",
        "name": "Q3",
        "type": "tri_state",
        "description": "3-state flip-flop output 3, high-impedance when OE is HIGH."
      },
      {
        "number": "17",
        "name": "Q2",
        "type": "tri_state",
        "description": "3-state flip-flop output 2, high-impedance when OE is HIGH."
      },
      {
        "number": "18",
        "name": "Q1",
        "type": "tri_state",
        "description": "3-state flip-flop output 1, high-impedance when OE is HIGH."
      },
      {
        "number": "19",
        "name": "Q0",
        "type": "tri_state",
        "description": "3-state flip-flop output 0, high-impedance when OE is HIGH."
      },
      {
        "number": "20",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage; the 74HCT574 is recommended for 4.5 V to 5.5 V operation (absolute maximum 7 V)."
      }
    ],
    "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 Table 2 pin description, which lists each symbol with an explicit pi; The datasheet covers the 74HC574 and 74HCT574 together and lists the SO20 (SOT163-1) package for bot"
        ],
        "pages_sent": 17,
        "cost_usd": 0.0874,
        "at": "2026-10-18T17:10:48"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586186961127792640",
        "pages": 17,
        "sha256": "2cb7f0c355e59666",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 20,
        "described": 20,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "74hct574d.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          10.3,
          12.8,
          2.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "59a10b341e6972b31d81802a048060326da627d8b92dcf4263064f4f62ec808e",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "74hct574d-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          10.3,
          12.8,
          2.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "0c8161beb088dbec991ed50b8fbace5e1917c0c8ba77d626713758775fe25562",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}