SN74F138DR

{
  "slug": "sn74f138dr",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments Logic ICs, SOIC-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "logic ics",
    "sn74f138dr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "sn74f138dr.kicad_sym",
    "sn74f138dr.kicad_mod",
    "sn74f138dr.glb",
    "sn74f138dr.step",
    "sn74f138dr.lbr",
    "docs/hero.png",
    "docs/sn74f138dr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "sn74f138dr-hero.glb",
    "sn74f138dr-hero.overlay.json",
    "sn74f138dr-etched.glb"
  ],
  "component": {
    "mpn": "SN74F138DR",
    "manufacturer": "Texas Instruments",
    "package": "SOIC-16",
    "pin_count": 16,
    "category": "Logic ICs",
    "subcategory": "Logic ICs",
    "datasheet": "https://www.ti.com/lit/ds/symlink/sn74f138.pdf",
    "parts": {
      "symbol": "sn74f138dr.kicad_sym",
      "footprint": "sn74f138dr.kicad_mod",
      "model_3d": "sn74f138dr-hero.glb",
      "model_3d_plain": "sn74f138dr-etched.glb",
      "model_3d_step": "sn74f138dr-etched.step",
      "model_3d_step_plain": "sn74f138dr.step",
      "lbr": "sn74f138dr.lbr"
    },
    "distributor_links": {
      "lcsc": "C354160",
      "digikey": "296-14805-2-ND",
      "mouser": "595-SN74F138DR"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T05:25:13Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-14805-2-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "595-SN74F138DR",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "A",
        "type": "input",
        "description": "Binary-select input that, together with B and C, selects one of the eight outputs Y0 to Y7 when the enables are active."
      },
      {
        "number": "2",
        "name": "B",
        "type": "input",
        "description": "Binary-select input that, together with A and C, selects one of the eight outputs Y0 to Y7 when the enables are active."
      },
      {
        "number": "3",
        "name": "C",
        "type": "input",
        "description": "Binary-select input (most significant bit of the select code) that, together with A and B, selects one of the eight outputs Y0 to Y7 when the enables are active."
      },
      {
        "number": "4",
        "name": "G2A",
        "type": "input",
        "description": "Active-low enable input; it must be low, along with G2B and with G1 high, for the selected output to go low."
      },
      {
        "number": "5",
        "name": "G2B",
        "type": "input",
        "description": "Active-low enable input; it must be low, along with G2A and with G1 high, for the selected output to go low."
      },
      {
        "number": "6",
        "name": "G1",
        "type": "input",
        "description": "Active-high enable input; it must be high, with G2A and G2B low, for the decoder to be enabled."
      },
      {
        "number": "7",
        "name": "Y7",
        "type": "output",
        "description": "Active-low decoded output that goes low when the select code addresses line 7 and the device is enabled, otherwise stays high."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for the device."
      },
      {
        "number": "9",
        "name": "Y6",
        "type": "output",
        "description": "Active-low decoded output that goes low when the select code addresses line 6 and the device is enabled, otherwise stays high."
      },
      {
        "number": "10",
        "name": "Y5",
        "type": "output",
        "description": "Active-low decoded output that goes low when the select code addresses line 5 and the device is enabled, otherwise stays high."
      },
      {
        "number": "11",
        "name": "Y4",
        "type": "output",
        "description": "Active-low decoded output that goes low when the select code addresses line 4 and the device is enabled, otherwise stays high."
      },
      {
        "number": "12",
        "name": "Y3",
        "type": "output",
        "description": "Active-low decoded output that goes low when the select code addresses line 3 and the device is enabled, otherwise stays high."
      },
      {
        "number": "13",
        "name": "Y2",
        "type": "output",
        "description": "Active-low decoded output that goes low when the select code addresses line 2 and the device is enabled, otherwise stays high."
      },
      {
        "number": "14",
        "name": "Y1",
        "type": "output",
        "description": "Active-low decoded output that goes low when the select code addresses line 1 and the device is enabled, otherwise stays high."
      },
      {
        "number": "15",
        "name": "Y0",
        "type": "output",
        "description": "Active-low decoded output that goes low when the select code addresses line 0 and the device is enabled, otherwise stays high."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage; recommended 4.5 V to 5.5 V with 5 V nominal, 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: The logic diagram on page 3 prints pin numbers that conflict with the top-view pin assignments on pa; The datasheet gives the pin map for the D (SOIC-16) package as the shared D/N top view. The only pac"
        ],
        "pages_sent": 20,
        "cost_usd": 0.0652,
        "at": "2026-10-18T05:20:27"
      },
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/sn74f138.pdf",
        "pages": 20,
        "sha256": "1a9770f61c3ab8c0",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 16,
        "described": 16,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "sn74f138dr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          9.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "d5eeddb4c0b304dc61950919b126fc61d7586abd5f16ab71a2a79759ec6498bf",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "sn74f138dr-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          9.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "1fa8075ffc048b06f6328aced4f90a577c2c9e3d27672735b70fa0aefe50ccf5",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}