MC74ACT139DTR2G

{
  "slug": "mc74act139dtr2g",
  "version": "0.1.0",
  "type": "component",
  "description": "onsemi Signal Switches, Multiplexers, Decoders, TSSOP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "logic",
    "mc74act139dtr2g",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
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    "path": "docs/hero.png"
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    "mc74act139dtr2g.lbr",
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    "docs/mc74act139dtr2g-datasheet.pdf",
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  "component": {
    "mpn": "MC74ACT139DTR2G",
    "manufacturer": "onsemi",
    "package": "TSSOP-16",
    "pin_count": 16,
    "category": "Logic",
    "subcategory": "Signal Switches, Multiplexers, Decoders",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588928991575625728",
    "parts": {
      "symbol": "mc74act139dtr2g.kicad_sym",
      "footprint": "mc74act139dtr2g.kicad_mod",
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      "model_3d_step": "mc74act139dtr2g-etched.step",
      "model_3d_step_plain": "mc74act139dtr2g.step",
      "lbr": "mc74act139dtr2g.lbr"
    },
    "distributor_links": {
      "lcsc": "C903995",
      "digikey": "488-MC74ACT139DTR2GTR-ND",
      "mouser": "863-MC74ACT139DTR2G"
    },
    "distributor_check": {
      "checked_at": "2026-10-20T17:15:59Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "488-MC74ACT139DTR2GTR-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "863-MC74ACT139DTR2G",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "Ea",
        "type": "input",
        "description": "Active-LOW enable for decoder a; when Ea is HIGH, all decoder a outputs (O0a to O3a) are forced HIGH."
      },
      {
        "number": "2",
        "name": "A0a",
        "type": "input",
        "description": "Binary-weighted address input A0 of decoder a; the ′ACT139 has TTL-compatible inputs."
      },
      {
        "number": "3",
        "name": "A1a",
        "type": "input",
        "description": "Binary-weighted address input A1 of decoder a; the ′ACT139 has TTL-compatible inputs."
      },
      {
        "number": "4",
        "name": "O0a",
        "type": "output",
        "description": "Active-LOW mutually exclusive output 0 of decoder a, rated to source/sink 24 mA."
      },
      {
        "number": "5",
        "name": "O1a",
        "type": "output",
        "description": "Active-LOW mutually exclusive output 1 of decoder a, rated to source/sink 24 mA."
      },
      {
        "number": "6",
        "name": "O2a",
        "type": "output",
        "description": "Active-LOW mutually exclusive output 2 of decoder a, rated to source/sink 24 mA."
      },
      {
        "number": "7",
        "name": "O3a",
        "type": "output",
        "description": "Active-LOW mutually exclusive output 3 of decoder a, rated to source/sink 24 mA."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference; all input and output voltages are specified referenced to GND."
      },
      {
        "number": "9",
        "name": "O3b",
        "type": "output",
        "description": "Active-LOW mutually exclusive output 3 of decoder b, rated to source/sink 24 mA."
      },
      {
        "number": "10",
        "name": "O2b",
        "type": "output",
        "description": "Active-LOW mutually exclusive output 2 of decoder b, rated to source/sink 24 mA."
      },
      {
        "number": "11",
        "name": "O1b",
        "type": "output",
        "description": "Active-LOW mutually exclusive output 1 of decoder b, rated to source/sink 24 mA."
      },
      {
        "number": "12",
        "name": "O0b",
        "type": "output",
        "description": "Active-LOW mutually exclusive output 0 of decoder b, rated to source/sink 24 mA."
      },
      {
        "number": "13",
        "name": "A1b",
        "type": "input",
        "description": "Binary-weighted address input A1 of decoder b; the ′ACT139 has TTL-compatible inputs."
      },
      {
        "number": "14",
        "name": "A0b",
        "type": "input",
        "description": "Binary-weighted address input A0 of decoder b; the ′ACT139 has TTL-compatible inputs."
      },
      {
        "number": "15",
        "name": "Eb",
        "type": "input",
        "description": "Active-LOW enable for decoder b; when Eb is HIGH, all decoder b outputs (O0b to O3b) are forced HIGH."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage: 2.0 V to 6.0 V for 74AC and 4.5 V to 5.5 V for 74ACT, with an absolute maximum of 7.0 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 pin-to-function mapping was read from the Figure 1 pinout drawing (16-Lead Packages, top view). ; The TSSOP-16 package drawing (CASE 948F) gives only a generic marking and no pin-function listing. T"
        ],
        "pages_sent": 9,
        "cost_usd": 0.0661,
        "at": "2026-10-20T17:14:00"
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      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588928991575625728",
        "pages": 9,
        "sha256": "db95a88f1355cf30",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 16,
        "described": 16,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
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        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
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        "checked": "2026-10-20",
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        "sha256": "04c5d23c290d426553498f73fb0a97964993df60e58f9227e4380d9e86d67aed",
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}