NCT3933U

{
  "slug": "nct3933u",
  "version": "0.1.0",
  "type": "component",
  "description": "Nuvoton Tech Digital To Analog Converters (DAC), SOT-23-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "data acquisition",
    "nct3933u",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "nct3933u.kicad_sym",
    "nct3933u.kicad_mod",
    "nct3933u.glb",
    "nct3933u.step",
    "nct3933u.lbr",
    "docs/hero.png",
    "docs/nct3933u-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "nct3933u-hero.glb",
    "nct3933u-hero.overlay.json",
    "nct3933u-etched.glb"
  ],
  "component": {
    "mpn": "NCT3933U",
    "manufacturer": "Nuvoton Tech",
    "package": "SOT-23-8",
    "pin_count": 8,
    "category": "Data Acquisition",
    "subcategory": "Digital To Analog Converters (DAC)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589835437381345280",
    "parts": {
      "symbol": "nct3933u.kicad_sym",
      "footprint": "nct3933u.kicad_mod",
      "model_3d": "nct3933u-hero.glb",
      "model_3d_plain": "nct3933u-etched.glb",
      "model_3d_step": "nct3933u-etched.step",
      "model_3d_step_plain": "nct3933u.step",
      "lbr": "nct3933u.lbr"
    },
    "distributor_links": {
      "lcsc": "C249428"
    },
    "distributor_check": {
      "checked_at": "2026-10-17T22:54:10Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VCC",
        "type": "power_in",
        "description": "DC power supply voltage input, 3 V to 5.5 V; the POR threshold at VCC rising is typically 2.6 V, and all outputs are disabled below that level."
      },
      {
        "number": "2",
        "name": "ADD_SEL",
        "type": "input",
        "description": "SMBus slave address select analog input; connect a resistor divider to set one of six addresses (0x2A to 0x20) per Table 1, with the ADD_SEL voltage compared to an internal reference."
      },
      {
        "number": "3",
        "name": "GND",
        "type": "power_in",
        "description": "Power supply ground."
      },
      {
        "number": "4",
        "name": "SDA",
        "type": "bidirectional",
        "description": "SMBus bidirectional serial data, open-drain with TTL-level and Schmitt-trigger inputs and 12 mA sink capability; requires a pull-up resistor (VPULLUP 2.7 V to 5.5 V)."
      },
      {
        "number": "5",
        "name": "SCL",
        "type": "input",
        "description": "SMBus serial clock input with a pull-up resistor required; SMBus input high voltage VIH is 2.1 V minimum and input low voltage VIL is 0.8 V maximum."
      },
      {
        "number": "6",
        "name": "OUT3",
        "type": "output",
        "description": "Analog current output that sinks or sources the current set by the internal OUT3 DAC register (up to ±1270 µA, or ±2540 µA with the twofold setting); the feedback voltage must be between 0.5 V and VCC-1 V for proper operation."
      },
      {
        "number": "7",
        "name": "OUT2",
        "type": "output",
        "description": "Analog current output that sinks or sources the current set by the internal OUT2 DAC register (up to ±1270 µA, or ±2540 µA with the twofold setting); the feedback voltage must be between 0.5 V and VCC-1 V for proper operation."
      },
      {
        "number": "8",
        "name": "OUT1",
        "type": "output",
        "description": "Analog current output that sinks or sources the current set by the internal OUT1 DAC register (up to ±1270 µA, or ±2540 µA with the twofold setting); the feedback voltage must be between 0.5 V and VCC-1 V for proper operation."
      }
    ],
    "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 datasheet's ordering table lists only one package for NCT3933U (SOT23-8 Green), so the pinout ab; Pin types are mapped to KiCad classes from the datasheet's pin attributes: SDA is I/OD (open drain),; The pin description for SDA in the source table reads 'I/OD12ts' and the attribute table defines it "
        ],
        "pages_sent": 26,
        "cost_usd": 0.0804,
        "at": "2026-10-17T22:52:36"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589835437381345280",
        "pages": 26,
        "sha256": "a30205302ec9a9ef",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "nct3933u.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.8,
          2.9,
          1.2
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "b9dc5b435d49868df7491668d5322debfe5d699dbb41c2ad93a41518ec9b5007",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "nct3933u-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.8,
          2.9,
          1.2
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "95e0657ae22111a6645b827cbbf0e9f76dcac84e59cebd3f630712fd74149c09",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}