SD4938TR

{
  "slug": "sd4938tr",
  "version": "0.1.0",
  "type": "component",
  "description": "SILAN(士兰微) , SOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "ic",
    "sd4938tr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "sd4938tr.kicad_sym",
    "sd4938tr.kicad_mod",
    "sd4938tr.glb",
    "sd4938tr.step",
    "sd4938tr.lbr",
    "docs/hero.png",
    "docs/sd4938tr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "sd4938tr-hero.glb",
    "sd4938tr-hero.overlay.json",
    "sd4938tr-etched.glb"
  ],
  "component": {
    "mpn": "SD4938TR",
    "manufacturer": "SILAN(士兰微)",
    "package": "SOP-8",
    "pin_count": 8,
    "category": "IC",
    "subcategory": "IC",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589835405353639936",
    "parts": {
      "symbol": "sd4938tr.kicad_sym",
      "footprint": "sd4938tr.kicad_mod",
      "model_3d": "sd4938tr-hero.glb",
      "model_3d_plain": "sd4938tr-etched.glb",
      "model_3d_step": "sd4938tr-etched.step",
      "model_3d_step_plain": "sd4938tr.step",
      "lbr": "sd4938tr.lbr"
    },
    "distributor_links": {
      "lcsc": "C5198081"
    },
    "distributor_check": {
      "checked_at": "2026-10-19T12:29:26Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VDD",
        "type": "power_in",
        "description": "Supplies the control circuitry; the datasheet gives a startup threshold of 12.1-13.9V (13V typ), an undervoltage point of 7.9-9.5V (8.7V typ), an overvoltage point of 21.5-24.5V (23V typ), a clamp of 28-35V (31V typ), and an operating range of 10-21V after startup."
      },
      {
        "number": "2",
        "name": "NC",
        "type": "unconnected",
        "description": "No connection; the datasheet lists this pin as not connected."
      },
      {
        "number": "3",
        "name": "NC",
        "type": "unconnected",
        "description": "No connection; the datasheet lists this pin as not connected."
      },
      {
        "number": "4",
        "name": "NC",
        "type": "unconnected",
        "description": "No connection; the datasheet lists this pin as not connected."
      },
      {
        "number": "5",
        "name": "DRAIN",
        "type": "output",
        "description": "Drain of the internal power MOSFET; the DRAIN-to-SOURCE high-voltage rating is 155V maximum, and the device is specified for a 20V to 150V input."
      },
      {
        "number": "6",
        "name": "DRAIN",
        "type": "output",
        "description": "Drain of the internal power MOSFET; the DRAIN-to-SOURCE high-voltage rating is 155V maximum, and the device is specified for a 20V to 150V input."
      },
      {
        "number": "7",
        "name": "VSET",
        "type": "input",
        "description": "Sets the output voltage: left floating gives 12V, tied to GND gives 15V, and a 51kΩ resistor to GND gives 18V."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Source of the power MOSFET and reference ground for the control circuit."
      }
    ],
    "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 classifies VDD as I/O; it is mapped here to power_in because it is the control circuit; DRAIN is printed as O in the datasheet and mapped to output; the two pins share the same net and are; Three pins are marked NC with no further detail. Each is listed separately as unconnected."
        ],
        "pages_sent": 8,
        "cost_usd": 0.039,
        "at": "2026-10-19T12:26:55"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589835405353639936",
        "pages": 8,
        "sha256": "4906b119d773c253",
        "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": "sd4938tr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          4.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-19",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "sd4938tr-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          4.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "9805bef5edd438bda9815eb10f56fb703535ae95b2a116903e749e3d1b5425f2",
        "checked": "2026-10-19",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}