74HC423D

{
  "slug": "74hc423d",
  "version": "0.1.0",
  "type": "component",
  "description": "Nexperia Monostable Multivibrators, SO-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "logic",
    "74hc423d",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "74hc423d.kicad_sym",
    "74hc423d.kicad_mod",
    "74hc423d.glb",
    "74hc423d.step",
    "74hc423d.lbr",
    "docs/hero.png",
    "docs/74hc423d-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "74hc423d-hero.glb",
    "74hc423d-hero.overlay.json",
    "74hc423d-etched.glb"
  ],
  "component": {
    "mpn": "74HC423D",
    "manufacturer": "Nexperia",
    "package": "SO-16",
    "pin_count": 16,
    "category": "Logic",
    "subcategory": "Monostable Multivibrators",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588913127458660352",
    "parts": {
      "symbol": "74hc423d.kicad_sym",
      "footprint": "74hc423d.kicad_mod",
      "model_3d": "74hc423d-hero.glb",
      "model_3d_plain": "74hc423d-etched.glb",
      "model_3d_step": "74hc423d-etched.step",
      "model_3d_step_plain": "74hc423d.step",
      "lbr": "74hc423d.lbr"
    },
    "distributor_links": {
      "lcsc": "C503393",
      "mouser": "771-74HC423D"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T06:10:26Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": "771-74HC423D",
        "status": "found",
        "lifecycle": "End of Life"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "1A",
        "type": "input",
        "description": "Trigger input, negative-edge triggered, with Schmitt-trigger action."
      },
      {
        "number": "2",
        "name": "1B",
        "type": "input",
        "description": "Trigger input, positive-edge triggered, with Schmitt-trigger action."
      },
      {
        "number": "3",
        "name": "1RD",
        "type": "input",
        "description": "Direct reset, active LOW; it forces 1Q LOW and 1Q HIGH and inhibits triggering while LOW."
      },
      {
        "number": "4",
        "name": "~{1Q}",
        "type": "output",
        "description": "Output, active LOW (inverted pulse output)."
      },
      {
        "number": "5",
        "name": "2Q",
        "type": "output",
        "description": "Output, active HIGH."
      },
      {
        "number": "6",
        "name": "2CEXT",
        "type": "passive",
        "description": "External capacitor connection; the datasheet recommends connecting this pin to GND externally for minimum noise generation."
      },
      {
        "number": "7",
        "name": "2REXT/CEXT",
        "type": "passive",
        "description": "External resistor/capacitor connection that sets the basic output pulse width together with pin 6."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Ground (0 V) reference for all voltages."
      },
      {
        "number": "9",
        "name": "2A",
        "type": "input",
        "description": "Trigger input, negative-edge triggered, with Schmitt-trigger action."
      },
      {
        "number": "10",
        "name": "2B",
        "type": "input",
        "description": "Trigger input, positive-edge triggered, with Schmitt-trigger action."
      },
      {
        "number": "11",
        "name": "2RD",
        "type": "input",
        "description": "Direct reset, active LOW; it forces 2Q LOW and 2Q HIGH and inhibits triggering while LOW."
      },
      {
        "number": "12",
        "name": "~{2Q}",
        "type": "output",
        "description": "Output, active LOW (inverted pulse output)."
      },
      {
        "number": "13",
        "name": "1Q",
        "type": "output",
        "description": "Output, active HIGH."
      },
      {
        "number": "14",
        "name": "1CEXT",
        "type": "passive",
        "description": "External capacitor connection; the datasheet recommends connecting this pin to GND externally for minimum noise generation."
      },
      {
        "number": "15",
        "name": "1REXT/CEXT",
        "type": "passive",
        "description": "External resistor/capacitor connection that sets the basic output pulse width together with pin 14."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage, specified from 2.0 V to 6.0 V (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 text extraction dropped the overbars. Pins 4 and 12 are marked as active-LOW outputs (1Q̅, 2Q̅) ; The datasheet's pin description table gives 1CEXT/2CEXT and 1REXT/CEXT/2REXT/CEXT as 'external conne; Pin numbers for the SO16 package were taken from the Section 5.1 pinning diagram text and cross-chec",
          "2/16 pins cited to the wrong page (name found elsewhere): ['6:2CEXT@p10', '14:1CEXT@p10']"
        ],
        "pages_sent": 17,
        "cost_usd": 0.0875,
        "at": "2026-10-18T06:07:51"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588913127458660352",
        "pages": 17,
        "sha256": "816f817e1c27b3c6",
        "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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        "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": "74hc423d-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
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        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "12dfe98fec51648b22076acf0b75ee06606aca66464dc63f35c1416a2c1a832b",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}