SN74LS145D

{
  "schema_version": 1,
  "type": "component",
  "slug": "sn74ls145d",
  "title": "SN74LS145D",
  "brief": "Texas Instruments Signal Switches, Multiplexers, Decoders, SOP-16. Pinout reviewed by a person against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
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    "logic",
    "sn74ls145d",
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  "component": {
    "mpn": "SN74LS145D",
    "manufacturer": "Texas Instruments",
    "package": "SOP-16",
    "pin_count": 16,
    "category": "Logic",
    "subcategory": "Signal Switches, Multiplexers, Decoders",
    "datasheet": "https://www.ti.com/cn/lit/gpn/sn74145",
    "parts": {
      "symbol": "sn74ls145d.kicad_sym",
      "footprint": "sn74ls145d.kicad_mod",
      "model_3d": "sn74ls145d-hero.glb",
      "model_3d_plain": "sn74ls145d-etched.glb",
      "model_3d_step": "sn74ls145d-etched.step",
      "model_3d_step_plain": "sn74ls145d.step",
      "lbr": "sn74ls145d.lbr"
    },
    "distributor_links": {
      "lcsc": "C2865078",
      "digikey": "2156-SN74LS145D-ND",
      "mouser": "595-SN74LS145D"
    },
    "distributor_check": {
      "checked_at": "2026-10-20T22:54:46Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "2156-SN74LS145D-ND",
        "status": "found",
        "lifecycle": "Obsolete"
      },
      "mouser": {
        "pn": "595-SN74LS145D",
        "status": "found",
        "lifecycle": "End of Life"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "Y0",
        "type": "output",
        "description": "Active-low open-collector decimal output 0; driven low when BCD input = 0000, off-state up to 15 V, sink up to 80 mA."
      },
      {
        "number": "2",
        "name": "Y1",
        "type": "output",
        "description": "Active-low open-collector decimal output 1; driven low when BCD input = 0001, off-state up to 15 V, sink up to 80 mA."
      },
      {
        "number": "3",
        "name": "Y2",
        "type": "output",
        "description": "Active-low open-collector decimal output 2; driven low when BCD input = 0010, off-state up to 15 V, sink up to 80 mA."
      },
      {
        "number": "4",
        "name": "Y3",
        "type": "output",
        "description": "Active-low open-collector decimal output 3; driven low when BCD input = 0011, off-state up to 15 V, sink up to 80 mA."
      },
      {
        "number": "5",
        "name": "Y4",
        "type": "output",
        "description": "Active-low open-collector decimal output 4; driven low when BCD input = 0100, off-state up to 15 V, sink up to 80 mA."
      },
      {
        "number": "6",
        "name": "Y5",
        "type": "output",
        "description": "Active-low open-collector decimal output 5; driven low when BCD input = 0101, off-state up to 15 V, sink up to 80 mA."
      },
      {
        "number": "7",
        "name": "Y6",
        "type": "output",
        "description": "Active-low open-collector decimal output 6; driven low when BCD input = 0110, off-state up to 15 V, sink up to 80 mA."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference (0 V); all output transistor emitters and logic ground return."
      },
      {
        "number": "9",
        "name": "Y7",
        "type": "output",
        "description": "Active-low open-collector decimal output 7; driven low when BCD input = 0111, off-state up to 15 V, sink up to 80 mA."
      },
      {
        "number": "10",
        "name": "Y8",
        "type": "output",
        "description": "Active-low open-collector decimal output 8; driven low when BCD input = 1000, off-state up to 15 V, sink up to 80 mA."
      },
      {
        "number": "11",
        "name": "Y9",
        "type": "output",
        "description": "Active-low open-collector decimal output 9; driven low when BCD input = 1001, off-state up to 15 V, sink up to 80 mA."
      },
      {
        "number": "12",
        "name": "D",
        "type": "input",
        "description": "BCD input D (MSB, weight 8); one Series 74LS standard load; VIH ≥ 2 V, VIL ≤ 0.8 V."
      },
      {
        "number": "13",
        "name": "C",
        "type": "input",
        "description": "BCD input C (weight 4); one Series 74LS standard load; VIH ≥ 2 V, VIL ≤ 0.8 V."
      },
      {
        "number": "14",
        "name": "B",
        "type": "input",
        "description": "BCD input B (weight 2); one Series 74LS standard load; VIH ≥ 2 V, VIL ≤ 0.8 V."
      },
      {
        "number": "15",
        "name": "A",
        "type": "input",
        "description": "BCD input A (LSB, weight 1); one Series 74LS standard load; VIH ≥ 2 V, VIL ≤ 0.8 V."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply voltage; recommended 4.75 V min to 5.25 V max (SN74LS145), absolute maximum 7 V."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/sn74145",
        "pages": 18,
        "sha256": "a973c320238235be",
        "source_tier": "lcsc"
      },
      "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": [
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        "file": "sn74ls145d.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": "2026-10-20",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "sn74ls145d-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "8a0bd83364b2772ba9a28fcf903583437e15956a626a517cfde0a145d67f6763",
        "checked": "2026-10-20",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "SOP-16",
      "Category": "Logic",
      "Pins": "16"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
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  "discovery_triggers": [
    "sn74ls145d"
  ],
  "discovery_pitch": "SN74LS145D (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": [
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    "README.md",
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    "sn74ls145d.step",
    "sn74ls145d.lbr",
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    "docs/sn74ls145d-datasheet.pdf",
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    "viewers/footprint.html",
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  "visibility": {
    "public": true
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}