74VHC21FT

{
  "slug": "74vhc21ft",
  "version": "0.1.0",
  "type": "component",
  "description": "TOSHIBA Logic Gates, TSSOP-14-175mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "logic",
    "74vhc21ft",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "74vhc21ft.kicad_sym",
    "74vhc21ft.kicad_mod",
    "74vhc21ft.glb",
    "74vhc21ft.step",
    "74vhc21ft.lbr",
    "docs/hero.png",
    "docs/74vhc21ft-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "74vhc21ft-hero.glb",
    "74vhc21ft-hero.overlay.json",
    "74vhc21ft-etched.glb"
  ],
  "component": {
    "mpn": "74VHC21FT",
    "manufacturer": "TOSHIBA",
    "package": "TSSOP-14-175mil",
    "pin_count": 14,
    "category": "Logic",
    "subcategory": "Logic Gates",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/31fb7493e9abc355b7183bdeb227105d.pdf",
    "parts": {
      "symbol": "74vhc21ft.kicad_sym",
      "footprint": "74vhc21ft.kicad_mod",
      "model_3d": "74vhc21ft-hero.glb",
      "model_3d_plain": "74vhc21ft-etched.glb",
      "model_3d_step": "74vhc21ft-etched.step",
      "model_3d_step_plain": "74vhc21ft.step",
      "lbr": "74vhc21ft.lbr"
    },
    "distributor_links": {
      "lcsc": "C4470883",
      "digikey": "74VHC21FTTR-ND",
      "mouser": "757-74VHC21FT"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T04:30:08Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "74VHC21FTTR-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "757-74VHC21FT",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "1A",
        "type": "input",
        "description": "Gate 1 input A; inputs accept 0 to 5.5 V regardless of supply voltage, and unused inputs must be tied to VCC or GND."
      },
      {
        "number": "2",
        "name": "1B",
        "type": "input",
        "description": "Gate 1 input B; accepts 0 to 5.5 V and must be tied to VCC or GND if unused."
      },
      {
        "number": "3",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection."
      },
      {
        "number": "4",
        "name": "1C",
        "type": "input",
        "description": "Gate 1 input C; accepts 0 to 5.5 V and must be tied to VCC or GND if unused."
      },
      {
        "number": "5",
        "name": "1D",
        "type": "input",
        "description": "Gate 1 input D; accepts 0 to 5.5 V and must be tied to VCC or GND if unused."
      },
      {
        "number": "6",
        "name": "1Y",
        "type": "output",
        "description": "Gate 1 AND output (high only when 1A, 1B, 1C and 1D are all high), with buffered output stage."
      },
      {
        "number": "7",
        "name": "GND",
        "type": "power_in",
        "description": "Ground (0 V) reference."
      },
      {
        "number": "8",
        "name": "2Y",
        "type": "output",
        "description": "Gate 2 AND output (high only when 2A, 2B, 2C and 2D are all high), with buffered output stage."
      },
      {
        "number": "9",
        "name": "2A",
        "type": "input",
        "description": "Gate 2 input A; accepts 0 to 5.5 V and must be tied to VCC or GND if unused."
      },
      {
        "number": "10",
        "name": "2B",
        "type": "input",
        "description": "Gate 2 input B; accepts 0 to 5.5 V and must be tied to VCC or GND if unused."
      },
      {
        "number": "11",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection."
      },
      {
        "number": "12",
        "name": "2C",
        "type": "input",
        "description": "Gate 2 input C; accepts 0 to 5.5 V and must be tied to VCC or GND if unused."
      },
      {
        "number": "13",
        "name": "2D",
        "type": "input",
        "description": "Gate 2 input D; accepts 0 to 5.5 V and must be tied to VCC or GND if unused."
      },
      {
        "number": "14",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply, operating range 2.0 V to 5.5 V (absolute maximum -0.5 to 7.0 V)."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-sonnet-5-5",
        "primary_mode": "text+vision",
        "consensus_model": "claude-opus-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Package is TSSOP14B per datasheet; the 175 mil width hint is not stated in the text, and the dimensi",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 7,
        "cost_usd": 0.2314,
        "at": "2026-10-18T04:27:11"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/31fb7493e9abc355b7183bdeb227105d.pdf",
        "pages": 7,
        "sha256": "24ef6f9c8328ac56",
        "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": "74vhc21ft.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          5.0,
          4.4,
          1.18
        ],
        "zmin_mm": 0.02,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "adb7a84bded69af4bb8da13f3d8376dbe6f2dab92a2eb38d3ef06f7a97738c34",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "74vhc21ft-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          5.0,
          4.4,
          1.18
        ],
        "zmin_mm": 0.02,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "d8857587dbc19f54b1eb6ba4220bef0aaf8d26ad9345c7537df923f11a33c15a",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}