SN74LS279AN

{
  "slug": "sn74ls279an",
  "version": "0.1.0",
  "type": "component",
  "description": "lingxingic Latches, DIP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "logic",
    "sn74ls279an",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "sn74ls279an.kicad_sym",
    "sn74ls279an.kicad_mod",
    "sn74ls279an.glb",
    "sn74ls279an.step",
    "sn74ls279an.lbr",
    "docs/hero.png",
    "docs/sn74ls279an-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "sn74ls279an-hero.glb",
    "sn74ls279an-hero.overlay.json",
    "sn74ls279an-etched.glb"
  ],
  "component": {
    "mpn": "SN74LS279AN",
    "manufacturer": "lingxingic",
    "package": "DIP-16",
    "pin_count": 16,
    "category": "Logic",
    "subcategory": "Latches",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8604435746656690176",
    "parts": {
      "symbol": "sn74ls279an.kicad_sym",
      "footprint": "sn74ls279an.kicad_mod",
      "model_3d": "sn74ls279an-hero.glb",
      "model_3d_plain": "sn74ls279an-etched.glb",
      "model_3d_step": "sn74ls279an-etched.step",
      "model_3d_step_plain": "sn74ls279an.step",
      "lbr": "sn74ls279an.lbr"
    },
    "distributor_links": {
      "lcsc": "C41430933",
      "digikey": "2156-SN74LS279AN-ND",
      "mouser": "595-SN74LS279AN"
    },
    "distributor_check": {
      "checked_at": "2026-10-14T17:14:06Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "2156-SN74LS279AN-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-SN74LS279AN",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "1R",
        "type": "input",
        "description": "Data input 1R of latch 1, an active-low R input whose level, together with S, sets Q per the function table; the datasheet gives no further electrical limits for this pin."
      },
      {
        "number": "2",
        "name": "1S1",
        "type": "input",
        "description": "Set input 1S1 of latch 1 (one of two S inputs); the latch is set when either or both S inputs are low, per the function table footnote."
      },
      {
        "number": "3",
        "name": "1S2",
        "type": "input",
        "description": "Set input 1S2 of latch 1 (second of two S inputs); the latch is set when either or both S inputs are low, per the function table footnote."
      },
      {
        "number": "4",
        "name": "1Q",
        "type": "output",
        "description": "Data output 1Q of latch 1; the datasheet gives no electrical limits for this pin beyond the absolute maximum output current of ±25 mA."
      },
      {
        "number": "5",
        "name": "2R",
        "type": "input",
        "description": "Data input 2R of latch 2, an active-low R input that, together with S, sets Q per the function table."
      },
      {
        "number": "6",
        "name": "2S",
        "type": "input",
        "description": "Set input 2S of latch 2, which sets the latch when low per the function table."
      },
      {
        "number": "7",
        "name": "2Q",
        "type": "output",
        "description": "Data output 2Q of latch 2; the datasheet gives no electrical limits for this pin beyond the absolute maximum output current of ±25 mA."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Ground (0 V) reference for all voltages in the datasheet."
      },
      {
        "number": "9",
        "name": "3Q",
        "type": "output",
        "description": "Data output 3Q of latch 3; the datasheet gives no electrical limits for this pin beyond the absolute maximum output current of ±25 mA."
      },
      {
        "number": "10",
        "name": "3R",
        "type": "input",
        "description": "Data input 3R of latch 3, an active-low R input that, together with S, sets Q per the function table."
      },
      {
        "number": "11",
        "name": "3S1",
        "type": "input",
        "description": "Set input 3S1 of latch 3 (one of two S inputs); the latch is set when either or both S inputs are low, per the function table footnote."
      },
      {
        "number": "12",
        "name": "3S2",
        "type": "input",
        "description": "Set input 3S2 of latch 3 (second of two S inputs); the latch is set when either or both S inputs are low, per the function table footnote."
      },
      {
        "number": "13",
        "name": "4Q",
        "type": "output",
        "description": "Data output 4Q of latch 4; the datasheet gives no electrical limits for this pin beyond the absolute maximum output current of ±25 mA."
      },
      {
        "number": "14",
        "name": "4R",
        "type": "input",
        "description": "Data input 4R of latch 4, an active-low R input that, together with S, sets Q per the function table."
      },
      {
        "number": "15",
        "name": "4S",
        "type": "input",
        "description": "Set input 4S of latch 4, which sets the latch when low per the function table."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage, specified at 2.0 V to 6.0 V in the recommended operating conditions."
      }
    ],
    "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 text extraction dropped the overbars on the active-low inputs (R and S). Pin names are given as ; The datasheet pin table is a single pinout for the whole family and does not list a separate pinout "
        ],
        "pages_sent": 17,
        "cost_usd": 0.0497,
        "at": "2026-10-14T17:13:45"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8604435746656690176",
        "pages": 17,
        "sha256": "504e78937b9aca6f",
        "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"
    },
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        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          7.874,
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        ],
        "zmin_mm": -3.3,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "17a30b1f0ab3fd5384a1231e3c63c394888d5b952c542a8c189e023ed3467464",
        "checked": "2026-10-14",
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        "sha256": "c7219772f8ccdbaeb6104ec3a31949830ba462f85f82a69d3058ce645c938781",
        "checked": "2026-10-14",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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  }
}