MT7938

{
  "slug": "mt7938",
  "version": "0.1.0",
  "type": "component",
  "description": "MAXIC Tech LED Drivers, SOT-23-6. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "nixie tube driver-led driver",
    "mt7938",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "mt7938.kicad_sym",
    "mt7938.kicad_mod",
    "mt7938.glb",
    "mt7938.step",
    "mt7938.lbr",
    "docs/hero.png",
    "docs/mt7938-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "mt7938-hero.glb",
    "mt7938-hero.overlay.json",
    "mt7938-etched.glb"
  ],
  "component": {
    "mpn": "MT7938",
    "manufacturer": "MAXIC Tech",
    "package": "SOT-23-6",
    "pin_count": 6,
    "category": "Nixie Tube Driver/LED Driver",
    "subcategory": "LED Drivers",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/9ebcfe2bb99c1e20ac91c9bd49da67a7.pdf",
    "parts": {
      "symbol": "mt7938.kicad_sym",
      "footprint": "mt7938.kicad_mod",
      "model_3d": "mt7938-hero.glb",
      "model_3d_plain": "mt7938-etched.glb",
      "model_3d_step": "mt7938-etched.step",
      "model_3d_step_plain": "mt7938.step",
      "lbr": "mt7938.lbr"
    },
    "distributor_links": {
      "lcsc": "C2979269"
    },
    "distributor_check": {
      "checked_at": "2026-10-27T01:12:43Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "TADJ",
        "type": "input",
        "description": "Over-temperature regulation setting pin; the temperature regulation threshold is set by the ratio of the external resistor R7 to the DSEN resistance (R7/(RDSEN+9kΩ)), giving 88°C to 148°C (148°C when floating)."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Chip ground."
      },
      {
        "number": "3",
        "name": "CS",
        "type": "input",
        "description": "Current sense pin; cycle-by-cycle over-current protection trips when CS exceeds 1.8V, with 240ns internal leading-edge blanking and an absolute maximum of 5V."
      },
      {
        "number": "4",
        "name": "DRV",
        "type": "output",
        "description": "Gate drive output for the external power MOSFET, with 0.2A sink and 0.2A source capability at DRV=4V and an absolute maximum of 24V."
      },
      {
        "number": "5",
        "name": "VDD",
        "type": "power_in",
        "description": "Chip power supply, operating range 6.8V to 20V (start-up at 20V, UVLO 6.8V falling, clamp 20V, OVP threshold 27V)."
      },
      {
        "number": "6",
        "name": "DSEN",
        "type": "input",
        "description": "Auxiliary winding feedback voltage sensed via a resistor divider to reflect output voltage; output OVP trips above 3.6V and the absolute maximum is 5V."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-sonnet-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [],
        "pages_sent": 7,
        "cost_usd": 0.0652,
        "at": "2026-10-27T01:12:07"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/9ebcfe2bb99c1e20ac91c9bd49da67a7.pdf",
        "pages": 7,
        "sha256": "b459f1b30c271350",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 6,
        "described": 6,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "mt7938.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.8,
          2.9,
          1.55
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "c9fe686b4d1b56927a41fa84a9bc1efb61d8a45a123a3db43bcaa05c2891d635",
        "checked": "2026-10-27",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "mt7938-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.8,
          2.9,
          1.55
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "4ab554b8f62e7a6494a441ab851a53aa49f4ec7179fb848d8e566b41c920696e",
        "checked": "2026-10-27",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}