π131U31

{
  "slug": "131u31",
  "version": "0.1.0",
  "type": "component",
  "description": "2Pai Semi Digital Isolators, SOIC-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "interface ics",
    "π131u31",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "131u31.kicad_sym",
    "131u31.kicad_mod",
    "131u31.glb",
    "131u31.step",
    "131u31.lbr",
    "docs/hero.png",
    "docs/131u31-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "131u31-hero.glb",
    "131u31-hero.overlay.json",
    "131u31-etched.glb"
  ],
  "component": {
    "mpn": "π131U31",
    "manufacturer": "2Pai Semi",
    "package": "SOIC-16",
    "pin_count": 16,
    "category": "Interface ICs",
    "subcategory": "Digital Isolators",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/eb1321e11132529e370a13f5e6a877f3.pdf",
    "parts": {
      "symbol": "131u31.kicad_sym",
      "footprint": "131u31.kicad_mod",
      "model_3d": "131u31-hero.glb",
      "model_3d_plain": "131u31-etched.glb",
      "model_3d_step": "131u31-etched.step",
      "model_3d_step_plain": "131u31.step",
      "lbr": "131u31.lbr"
    },
    "distributor_links": {
      "lcsc": "C471596"
    },
    "distributor_check": {
      "checked_at": "2026-10-22T19:48:07Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VDD1",
        "type": "power_in",
        "description": "Primary-side (VDD1) supply of the isolator, 3 V to 5.5 V recommended operating range, bypassed to GND1 with a 0.1 uF to 10 uF low-ESR ceramic capacitor."
      },
      {
        "number": "2",
        "name": "GND1",
        "type": "power_in",
        "description": "Ground reference for the primary-side VDD1 supply."
      },
      {
        "number": "3",
        "name": "VIA",
        "type": "input",
        "description": "Channel A input on the VDD1 side, with logic thresholds of 0.7*VDD1 (high) and 0.3*VDD1 (low) at the recommended levels."
      },
      {
        "number": "4",
        "name": "VIB",
        "type": "input",
        "description": "Channel B input on the VDD1 side, with logic thresholds of 0.7*VDD1 (high) and 0.3*VDD1 (low) at the recommended levels."
      },
      {
        "number": "5",
        "name": "VOC",
        "type": "output",
        "description": "Channel C output on the VDD1 side (reverse channel from VIC), with 6 mA maximum recommended output current."
      },
      {
        "number": "6",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect pin (datasheet: empty pin)."
      },
      {
        "number": "7",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect pin; on the π131U3X device this pin is empty (it is the EN1 output enable only on π131U6X)."
      },
      {
        "number": "8",
        "name": "GND1",
        "type": "power_in",
        "description": "Ground reference for the primary-side VDD1 supply."
      },
      {
        "number": "9",
        "name": "GND2",
        "type": "power_in",
        "description": "Ground reference for the secondary-side VDD2 supply."
      },
      {
        "number": "10",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect pin; on the π131U3X device this pin is empty (it is the EN2 output enable only on π131U6X)."
      },
      {
        "number": "11",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect pin (datasheet: empty pin)."
      },
      {
        "number": "12",
        "name": "VIC",
        "type": "input",
        "description": "Channel C input on the VDD2 side, with logic thresholds of 0.7*VDD2 (high) and 0.3*VDD2 (low) at the recommended levels."
      },
      {
        "number": "13",
        "name": "VOB",
        "type": "output",
        "description": "Channel B output on the VDD2 side, with 6 mA maximum recommended output current."
      },
      {
        "number": "14",
        "name": "VOA",
        "type": "output",
        "description": "Channel A output on the VDD2 side, with 6 mA maximum recommended output current."
      },
      {
        "number": "15",
        "name": "GND2",
        "type": "power_in",
        "description": "Ground reference for the secondary-side VDD2 supply."
      },
      {
        "number": "16",
        "name": "VDD2",
        "type": "power_in",
        "description": "Secondary-side (VDD2) supply of the isolator, 3 V to 5.5 V recommended operating range, bypassed to GND2 with a 0.1 uF to 10 uF low-ESR ceramic capacitor."
      }
    ],
    "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": [
          "extractor flagged: Pin-type and direction assignments for VOC (pin 5, output on VDD1 side) and VIC (pin 12, input on VD; Pins 7 and 10 are NC/EN1 and NC/EN2 on the family; for π131U31 (3X variant) the datasheet says they "
        ],
        "pages_sent": 18,
        "cost_usd": 0.1715,
        "at": "2026-10-22T19:47:09"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/eb1321e11132529e370a13f5e6a877f3.pdf",
        "pages": 18,
        "sha256": "d3202c14b062facd",
        "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": [
      {
        "file": "131u31.step",
        "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": "2026-10-22",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "131u31-etched.step",
        "role": "eda",
        "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": "9a341b2f339a0b353a36576b8f7488590a9d3fad1b8ac5771fb87970df5f2da1",
        "checked": "2026-10-22",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}