TC74HC125AFELF

{
  "slug": "tc74hc125afelf",
  "version": "0.1.0",
  "type": "component",
  "description": "TOSHIBA Buffer/Driver/Transceiver, SOIC-14-208mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "logic ics",
    "tc74hc125afelf",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "tc74hc125afelf.kicad_sym",
    "tc74hc125afelf.kicad_mod",
    "tc74hc125afelf.glb",
    "tc74hc125afelf.step",
    "tc74hc125afelf.lbr",
    "docs/hero.png",
    "docs/tc74hc125afelf-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "tc74hc125afelf-hero.glb",
    "tc74hc125afelf-hero.overlay.json",
    "tc74hc125afelf-etched.glb"
  ],
  "component": {
    "mpn": "TC74HC125AFELF",
    "manufacturer": "TOSHIBA",
    "package": "SOIC-14-208mil",
    "pin_count": 14,
    "category": "Logic ICs",
    "subcategory": "Buffer/Driver/Transceiver",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/0b089222863af801dfedae507c927754.pdf",
    "parts": {
      "symbol": "tc74hc125afelf.kicad_sym",
      "footprint": "tc74hc125afelf.kicad_mod",
      "model_3d": "tc74hc125afelf-hero.glb",
      "model_3d_plain": "tc74hc125afelf-etched.glb",
      "model_3d_step": "tc74hc125afelf-etched.step",
      "model_3d_step_plain": "tc74hc125afelf.step",
      "lbr": "tc74hc125afelf.lbr"
    },
    "distributor_links": {
      "lcsc": "C3755313",
      "digikey": "TC74HC125AFELFTR-ND",
      "mouser": "757-TC74HC125AFELF"
    },
    "distributor_check": {
      "checked_at": "2026-10-24T00:08:04Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "TC74HC125AFELFTR-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "757-TC74HC125AFELF",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "1G",
        "type": "input",
        "description": "Active-low 3-state control input for buffer 1; high places output 1Y in high impedance (TC74HC125A)."
      },
      {
        "number": "2",
        "name": "1A",
        "type": "input",
        "description": "Data input of buffer 1, to be tied to VCC or GND if unused, with input range 0 to VCC."
      },
      {
        "number": "3",
        "name": "1Y",
        "type": "tri_state",
        "description": "3-state output of buffer 1 with drive of |IOH| = IOL = 6 mA (min), high-impedance when 1G is high."
      },
      {
        "number": "4",
        "name": "2G",
        "type": "input",
        "description": "Active-low 3-state control input for buffer 2; high places output 2Y in high impedance."
      },
      {
        "number": "5",
        "name": "2A",
        "type": "input",
        "description": "Data input of buffer 2, to be tied to VCC or GND if unused, with input range 0 to VCC."
      },
      {
        "number": "6",
        "name": "2Y",
        "type": "tri_state",
        "description": "3-state output of buffer 2 with drive of |IOH| = IOL = 6 mA (min), high-impedance when 2G is high."
      },
      {
        "number": "7",
        "name": "GND",
        "type": "power_in",
        "description": "Ground (0 V) supply pin."
      },
      {
        "number": "8",
        "name": "3Y",
        "type": "tri_state",
        "description": "3-state output of buffer 3 with drive of |IOH| = IOL = 6 mA (min), high-impedance when 3G is high."
      },
      {
        "number": "9",
        "name": "3A",
        "type": "input",
        "description": "Data input of buffer 3, to be tied to VCC or GND if unused, with input range 0 to VCC."
      },
      {
        "number": "10",
        "name": "3G",
        "type": "input",
        "description": "Active-low 3-state control input for buffer 3; high places output 3Y in high impedance."
      },
      {
        "number": "11",
        "name": "4Y",
        "type": "tri_state",
        "description": "3-state output of buffer 4 with drive of |IOH| = IOL = 6 mA (min), high-impedance when 4G is high."
      },
      {
        "number": "12",
        "name": "4A",
        "type": "input",
        "description": "Data input of buffer 4, to be tied to VCC or GND if unused, with input range 0 to VCC."
      },
      {
        "number": "13",
        "name": "4G",
        "type": "input",
        "description": "Active-low 3-state control input for buffer 4; high places output 4Y in high impedance."
      },
      {
        "number": "14",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply, operating range 2 to 6 V (absolute maximum -0.5 to 7 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 hint says SOIC-14-208mil, but the datasheet's SMD package for the AF suffix is SOP14-P-300-1; The pin assignment drawing on page 2 labels both pin 3 and pin 6 as '2Y'. Pin 3 is taken as 1Y, base; The MPN suffix 'ELF' is not explained in the datasheet. The part is assumed to be the TC74HC125A (ac",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 8,
        "cost_usd": 0.2992,
        "at": "2026-10-24T00:07:44"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/0b089222863af801dfedae507c927754.pdf",
        "pages": 8,
        "sha256": "763b2b012253023a",
        "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": "tc74hc125afelf.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": "2026-10-24",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "tc74hc125afelf-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": "292ffb4a464baa3df699da007fb9772cf0ca8c65b21e5d6736de2c23ebb67540",
        "checked": "2026-10-24",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}