74HCT74D

{
  "slug": "74hct74d",
  "version": "0.1.0",
  "type": "component",
  "description": "Nexperia Flip Flops, SO-14. Pinout reviewed by a person against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "logic",
    "74hct74d",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "74hct74d.kicad_sym",
    "74hct74d.kicad_mod",
    "74hct74d.glb",
    "74hct74d.step",
    "74hct74d.lbr",
    "docs/hero.png",
    "docs/74hct74d-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "74hct74d-hero.glb",
    "74hct74d-hero.overlay.json",
    "74hct74d-etched.glb"
  ],
  "component": {
    "mpn": "74HCT74D",
    "manufacturer": "Nexperia",
    "package": "SO-14",
    "pin_count": 14,
    "category": "Logic",
    "subcategory": "Flip Flops",
    "datasheet": "https://assets.nexperia.com/documents/data-sheet/74HCT74D.pdf",
    "parts": {
      "symbol": "74hct74d.kicad_sym",
      "footprint": "74hct74d.kicad_mod",
      "model_3d": "74hct74d-hero.glb",
      "model_3d_plain": "74hct74d-etched.glb",
      "model_3d_step": "74hct74d-etched.step",
      "model_3d_step_plain": "74hct74d.step",
      "lbr": "74hct74d.lbr"
    },
    "distributor_links": {
      "lcsc": "C686657"
    },
    "distributor_check": {
      "checked_at": "2026-10-29T17:06:22Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "1RD",
        "type": "input",
        "description": "Asynchronous reset-direct input for flip-flop 1, active LOW."
      },
      {
        "number": "2",
        "name": "1D",
        "type": "input",
        "description": "Data input for flip-flop 1, sampled on the LOW-to-HIGH clock transition."
      },
      {
        "number": "3",
        "name": "1CP",
        "type": "input",
        "description": "Clock input for flip-flop 1, LOW-to-HIGH edge-triggered with Schmitt-trigger action."
      },
      {
        "number": "4",
        "name": "1SD",
        "type": "input",
        "description": "Asynchronous set-direct input for flip-flop 1, active LOW."
      },
      {
        "number": "5",
        "name": "1Q",
        "type": "output",
        "description": "True output of flip-flop 1."
      },
      {
        "number": "6",
        "name": "1Q",
        "type": "output",
        "description": "Complement output of flip-flop 1."
      },
      {
        "number": "7",
        "name": "GND",
        "type": "power_in",
        "description": "Ground (0 V) reference for all voltages."
      },
      {
        "number": "8",
        "name": "2Q",
        "type": "output",
        "description": "Complement output of flip-flop 2."
      },
      {
        "number": "9",
        "name": "2Q",
        "type": "output",
        "description": "True output of flip-flop 2."
      },
      {
        "number": "10",
        "name": "2SD",
        "type": "input",
        "description": "Asynchronous set-direct input for flip-flop 2, active LOW."
      },
      {
        "number": "11",
        "name": "2CP",
        "type": "input",
        "description": "Clock input for flip-flop 2, LOW-to-HIGH edge-triggered with Schmitt-trigger action."
      },
      {
        "number": "12",
        "name": "2D",
        "type": "input",
        "description": "Data input for flip-flop 2, sampled on the LOW-to-HIGH clock transition."
      },
      {
        "number": "13",
        "name": "2RD",
        "type": "input",
        "description": "Asynchronous reset-direct input for flip-flop 2, active LOW."
      },
      {
        "number": "14",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage; 2.0 V to 6.0 V for 74HC74 and 4.5 V to 5.5 V for 74HCT74 in the recommended operating conditions."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://assets.nexperia.com/documents/data-sheet/74HCT74D.pdf",
        "pages": 19,
        "sha256": "1e4ab9833ba6e6a3",
        "source_tier": "mfr"
      },
      "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"
    },
    "models_3d": [
      {
        "file": "74hct74d.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          8.65,
          1.55
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "d7cc2dba1160a8089d80d16b63eb6d6a5c73c70f2d20328e6dd8f3b7be689409",
        "checked": "2026-10-29",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "74hct74d-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          8.65,
          1.55
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "dc1bb34d99ac397b383421306051aca1fdbb195233c9709f76f8ac2c356a3efb",
        "checked": "2026-10-29",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ],
    "package_dims": {
      "package_code": "SOT108-1",
      "source_page": 13,
      "D": {
        "nom_mm": 8.65,
        "range_mm": [
          8.55,
          8.75
        ]
      },
      "E1": {
        "nom_mm": 3.9,
        "range_mm": [
          3.8,
          4.0
        ]
      },
      "E": {
        "nom_mm": 6.0,
        "range_mm": [
          5.8,
          6.2
        ]
      },
      "e": {
        "nom_mm": 1.27,
        "range_mm": [
          null,
          null
        ]
      },
      "A": {
        "nom_mm": 1.75,
        "range_mm": [
          null,
          1.75
        ]
      },
      "source": "datasheet package drawing, every number found on its page (extract_pins --task dims)",
      "model_check": {
        "file": "74hct74d.step",
        "verdict": "PASS",
        "reasons": [
          "height and body within the datasheet's package drawing"
        ],
        "by": "factory/package_fit.py"
      }
    }
  }
}