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Ray Set visibility: public d266761 3d ago
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{
  "schema_version": 1,
  "type": "component",
  "slug": "lm331p",
  "title": "LM331P",
  "brief": "Sungine V/F And F/V Converters, SOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "data acquisition",
    "lm331p",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "LM331P",
    "manufacturer": "Sungine",
    "package": "SOP-8",
    "pin_count": 8,
    "category": "Data Acquisition",
    "subcategory": "V/F And F/V Converters",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/174eb9d296b2a58d243924182ce06bcd.pdf",
    "parts": {
      "symbol": "lm331p.kicad_sym",
      "footprint": "lm331p.kicad_mod",
      "model_3d": "lm331p-hero.glb",
      "model_3d_plain": "lm331p-etched.glb",
      "model_3d_step": "lm331p-etched.step",
      "model_3d_step_plain": "lm331p.step",
      "lbr": "lm331p.lbr"
    },
    "distributor_links": {
      "lcsc": "C5274779"
    },
    "distributor_check": {
      "checked_at": "2026-10-23T03:15:24Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "CURO",
        "type": "output",
        "description": "Current output (switched current source output, flows to pin 1 or GND depending on RS flip-flop state; current range 10 to 500 µA)."
      },
      {
        "number": "2",
        "name": "REFCUR",
        "type": "output",
        "description": "Reference current pin held at 1.9V (1.70 to 2.08V) by the charge pump, setting i = 1.9V/Rs (135 µA at Rs = 14k); do not draw current from it."
      },
      {
        "number": "3",
        "name": "FOUT",
        "type": "output",
        "description": "Frequency output driver transistor with about 50 ohm saturation resistance, output current limited below 50 mA and tolerates up to 40V."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "5",
        "name": "R/C",
        "type": "input",
        "description": "Timing comparator input for external Rt/Ct, threshold 2/3 of VS (0.667 typ) that resets the RS flip-flop."
      },
      {
        "number": "6",
        "name": "THD",
        "type": "input",
        "description": "Input comparator inverting input; comparator triggers timer when pin 7 voltage is higher than pin 6."
      },
      {
        "number": "7",
        "name": "COM I",
        "type": "input",
        "description": "Input comparator non-inverting input with bias current of -80 nA typ, common-mode range -0.2V to VCC-2.0V."
      },
      {
        "number": "8",
        "name": "VS",
        "type": "power_in",
        "description": "Power supply, 4.0V to 40V operating (absolute maximum 40V)."
      }
    ],
    "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-diagram figure (Fig. 1) is an image and not in the text; pin assignments taken from the pin desc; Ordering table lists LM231P/331P as SOP8 package; the MPN LM331P matches SOP-8."
        ],
        "pages_sent": 12,
        "cost_usd": 0.0773,
        "at": "2026-10-23T03:15:12"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/174eb9d296b2a58d243924182ce06bcd.pdf",
        "pages": 12,
        "sha256": "20bc1d95008650ea",
        "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": [
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        "file": "lm331p.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-23",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lm331p-etched.step",
        "role": "eda",
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        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "de4001c971388e741c0dbd23f1da728528e7a9eca90ba98ad9f23aa19ce78f16",
        "checked": "2026-10-23",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Sungine",
      "Package": "SOP-8",
      "Category": "Data Acquisition",
      "Pins": "8"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "20bc1d95008650ea4c407a6e8c0030b238eb6363d92b48a077b0ab1ad8a210c7",
      "rows": [
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          "name": "VFC nonlinearity",
          "symbol": "",
          "kind": "electrical",
          "unit": "% full scale",
          "min": -0.01,
          "typ": 0.003,
          "max": 0.01,
          "conditions": "4.5V≤VS≤20V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "VFC nonlinearity over temperature",
          "symbol": "",
          "kind": "electrical",
          "unit": "% full scale",
          "min": -0.02,
          "typ": 0.006,
          "max": 0.02,
          "conditions": "TMIN≤TA≤TMAX",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "VFC nonlinearity (Fig 3)",
          "symbol": "",
          "kind": "electrical",
          "unit": "% full scale",
          "min": -0.14,
          "typ": 0.024,
          "max": 0.14,
          "conditions": "VS=15V, f=10~11kHz",
          "source_page": 4,
          "source": "datasheet"
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        {
          "name": "Conversion accuracy scale factor",
          "symbol": "",
          "kind": "electrical",
          "unit": "kHz/V",
          "min": 0.9,
          "typ": 1,
          "max": 1.1,
          "conditions": "VIN=-10V, RS=14kΩ",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Gain temperature stability LM331",
          "symbol": "",
          "kind": "temperature_coefficient",
          "unit": "ppm/℃",
          "min": -150,
          "typ": 30,
          "max": 150,
          "conditions": "TMIN≤TA≤TMAX, 4.5V≤VS≤20V",
          "source_page": 4,
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        {
          "name": "Gain change with VS (4.5V-10V)",
          "symbol": "",
          "kind": "electrical",
          "unit": "%/V",
          "min": null,
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          "max": 0.1,
          "conditions": "4.5V≤VS≤10V",
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          "source": "datasheet"
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        {
          "name": "Gain change with VS (10V-40V)",
          "symbol": "",
          "kind": "electrical",
          "unit": "%/V",
          "min": null,
          "typ": 0.006,
          "max": 0.06,
          "conditions": "10V≤VS≤40V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Rated full-scale frequency",
          "symbol": "",
          "kind": "electrical",
          "unit": "kHz",
          "min": null,
          "typ": 10,
          "max": null,
          "conditions": "VIN=-10V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Long-term gain stability (1000 h)",
          "symbol": "",
          "kind": "electrical",
          "unit": "% full scale",
          "min": null,
          "typ": 0.02,
          "max": null,
          "conditions": "TMIN≤TA≤TMAX",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Overrange frequency",
          "symbol": "",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 10,
          "max": null,
          "conditions": "VIN=-11V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Input comparator offset voltage LM331",
          "symbol": "",
          "kind": "electrical",
          "unit": "mV",
          "min": -14,
          "typ": 4,
          "max": 14,
          "conditions": "TMIN≤TA≤TMAX",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Input comparator bias current",
          "symbol": "",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": -80,
          "max": -300,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Input comparator offset current",
          "symbol": "",
          "kind": "electrical",
          "unit": "nA",
          "min": -100,
          "typ": 8,
          "max": 100,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Input comparator common-mode range",
          "symbol": "",
          "kind": "electrical",
          "unit": "V",
          "min": -0.2,
          "typ": null,
          "max": null,
          "conditions": "TMIN≤TA≤TMAX; max VCC-2.0",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Timer threshold voltage (pin 5)",
          "symbol": "",
          "kind": "electrical",
          "unit": "*VS",
          "min": 0.63,
          "typ": 0.667,
          "max": 0.7,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Timer input bias current (pin 5), all drive",
          "symbol": "",
          "kind": "electrical",
          "unit": "nA",
          "min": -100,
          "typ": 10,
          "max": 100,
          "conditions": "VS=15V, 0V≤Vpin5≤9.9V, all drive",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Timer input bias current (pin 5) LM1/2/331",
          "symbol": "",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": 200,
          "max": 1000,
          "conditions": "Vpin5=10V, LM1/2/331",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "VSAT (pin 5 reset)",
          "symbol": "VSAT",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.22,
          "max": 0.5,
          "conditions": "I=5mA",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Current source output current (pin 1)",
          "symbol": "",
          "kind": "electrical",
          "unit": "µA",
          "min": 116,
          "typ": 136,
          "max": 156,
          "conditions": "RS=14kΩ, VPIN1=0",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Change in output current with voltage",
          "symbol": "",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 0.2,
          "max": 1,
          "conditions": "0V≤VPIN1≤10V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Current source off leakage",
          "symbol": "",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": 0.02,
          "max": 10,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Current source off leakage at TMAX",
          "symbol": "",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": 2,
          "max": 50,
          "conditions": "TA=TMAX, all drive",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Operating current range",
          "symbol": "",
          "kind": "electrical",
          "unit": "µA",
          "min": 10,
          "typ": null,
          "max": 500,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Reference voltage (pin 2)",
          "symbol": "",
          "kind": "electrical",
          "unit": "VDC",
          "min": 1.7,
          "typ": 1.89,
          "max": 2.08,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Reference voltage temperature stability",
          "symbol": "",
          "kind": "temperature_coefficient",
          "unit": "ppm/℃",
          "min": null,
          "typ": 60,
          "max": null,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Reference voltage time stability (1000 h)",
          "symbol": "",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 0.1,
          "max": null,
          "conditions": "1000 hours",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Logic output VSAT (pin 3)",
          "symbol": "VSAT",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.15,
          "max": 0.5,
          "conditions": "I=5mA",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Logic output VSAT, 2 TTL loads",
          "symbol": "VSAT",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.1,
          "max": 0.4,
          "conditions": "I=3.2mA (2 TTL loads), TMIN≤TA≤TMAX",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Logic output off leakage",
          "symbol": "",
          "kind": "electrical",
          "unit": "µA",
          "min": -1,
          "typ": 0.05,
          "max": 1,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Supply current",
          "symbol": "",
          "kind": "electrical",
          "unit": "mA",
          "min": 1.5,
          "typ": 3,
          "max": 6,
          "conditions": "VS=5V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Supply current",
          "symbol": "",
          "kind": "electrical",
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          "min": 2,
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          "conditions": "VS=40V",
          "source_page": 5,
          "source": "datasheet"
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        {
          "name": "Supply voltage",
          "symbol": "VS",
          "kind": "absolute_maximum",
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          "min": null,
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          "max": 40,
          "conditions": "",
          "source_page": 3,
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        },
        {
          "name": "Input voltage",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.2,
          "typ": null,
          "max": null,
          "conditions": "max Vs",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Operating temperature range LM331",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": 0,
          "typ": null,
          "max": 70,
          "conditions": "LM331",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Power dissipation",
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          "kind": "absolute_maximum",
          "unit": "W",
          "min": null,
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          "max": 1.25,
          "conditions": "25℃",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Soldering temperature",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": null,
          "typ": null,
          "max": 260,
          "conditions": "spot soldering, 10 seconds",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Operating supply voltage",
          "symbol": "VS",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 4,
          "typ": null,
          "max": 40,
          "conditions": "conditions for tables 1 and 2",
          "source_page": 5,
          "source": "datasheet"
        }
      ]
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  },
  "variants": [],
  "sections": [
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    "info"
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  "discovery_triggers": [
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  "discovery_pitch": "LM331P (Sungine) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
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}