SN74LS148DR

{
  "schema_version": 1,
  "type": "component",
  "slug": "sn74ls148dr",
  "title": "SN74LS148DR",
  "brief": "Texas Instruments Signal Switches, Multiplexers, Decoders, SOIC-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "logic",
    "sn74ls148dr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "SN74LS148DR",
    "manufacturer": "Texas Instruments",
    "package": "SOIC-16",
    "pin_count": 16,
    "category": "Logic",
    "subcategory": "Signal Switches, Multiplexers, Decoders",
    "datasheet": "https://www.ti.com/lit/ds/symlink/sn74ls148.pdf",
    "parts": {
      "symbol": "sn74ls148dr.kicad_sym",
      "footprint": "sn74ls148dr.kicad_mod",
      "model_3d": "sn74ls148dr-hero.glb",
      "model_3d_plain": "sn74ls148dr.glb",
      "model_3d_step": "sn74ls148dr-etched.step",
      "model_3d_step_plain": "sn74ls148dr.step",
      "lbr": "sn74ls148dr.lbr"
    },
    "distributor_links": {
      "lcsc": "C2674594",
      "digikey": "296-29445-2-ND",
      "mouser": "595-SN74LS148DR"
    },
    "distributor_check": {
      "checked_at": "2026-10-07T02:09:22Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-29445-2-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-SN74LS148DR",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "4",
        "type": "input",
        "description": "Active-low data input 4 of the eight priority-encoded data lines."
      },
      {
        "number": "2",
        "name": "5",
        "type": "input",
        "description": "Active-low data input 5 of the eight priority-encoded data lines."
      },
      {
        "number": "3",
        "name": "6",
        "type": "input",
        "description": "Active-low data input 6 of the eight priority-encoded data lines."
      },
      {
        "number": "4",
        "name": "7",
        "type": "input",
        "description": "Active-low data input 7, the highest-priority data line."
      },
      {
        "number": "5",
        "name": "EI",
        "type": "input",
        "description": "Enable input for cascading; a high level forces all outputs high and a low level enables encoding."
      },
      {
        "number": "6",
        "name": "A2",
        "type": "output",
        "description": "Active-low address output A2 of the three-line (4-2-1) binary code."
      },
      {
        "number": "7",
        "name": "A1",
        "type": "output",
        "description": "Active-low address output A1 of the three-line (4-2-1) binary code."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "9",
        "name": "A0",
        "type": "output",
        "description": "Active-low address output A0 of the three-line (4-2-1) binary code."
      },
      {
        "number": "10",
        "name": "0",
        "type": "input",
        "description": "Active-low data input 0, the lowest-priority data line."
      },
      {
        "number": "11",
        "name": "1",
        "type": "input",
        "description": "Active-low data input 1 of the eight priority-encoded data lines."
      },
      {
        "number": "12",
        "name": "2",
        "type": "input",
        "description": "Active-low data input 2 of the eight priority-encoded data lines."
      },
      {
        "number": "13",
        "name": "3",
        "type": "input",
        "description": "Active-low data input 3 of the eight priority-encoded data lines."
      },
      {
        "number": "14",
        "name": "GS",
        "type": "output",
        "description": "Active-low group select output that goes low when EI is low and any data input is low."
      },
      {
        "number": "15",
        "name": "EO",
        "type": "output",
        "description": "Active-low enable output for cascading that goes low only when EI is low and all data inputs are high."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply voltage."
      }
    ],
    "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": "vision",
        "consensus_model": "claude-opus-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Pin 15 is printed as 'E0' on the package diagram, but the description and function table call it EO ; I did not read pages 4-12, so the descriptions have no numeric limits such as supply range or drive ",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 12,
        "cost_usd": 0.2157,
        "at": "2026-10-07T02:08:57"
      },
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/sn74ls148.pdf",
        "pages": 28,
        "sha256": "51a9a41a1e0caacc",
        "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": "sn74ls148dr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          9.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "d5eeddb4c0b304dc61950919b126fc61d7586abd5f16ab71a2a79759ec6498bf",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "sn74ls148dr-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          9.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "022bceb932e9c532ad8fc25e12f62e93b0ead489c2627a945ae6392ac5a60a72",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "SOIC-16",
      "Category": "Logic",
      "Pins": "16"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "sn74ls148dr"
  ],
  "discovery_pitch": "SN74LS148DR (Texas Instruments) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "sn74ls148dr.kicad_sym",
    "sn74ls148dr.kicad_mod",
    "sn74ls148dr.glb",
    "sn74ls148dr.step",
    "sn74ls148dr.lbr",
    "docs/hero.png",
    "docs/sn74ls148dr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "sn74ls148dr-hero.glb",
    "sn74ls148dr-hero.overlay.json"
  ],
  "visibility": {
    "public": true
  }
}