main
Ray Set visibility: public 7124e12 1d ago
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{
  "schema_version": 1,
  "type": "component",
  "slug": "le87271eqct",
  "title": "LE87271EQCT",
  "brief": "Microchip Tech Telecommunication Interface ICs, QFN-20-EP(4x4). 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",
    "communication interface chip-uart-485-232",
    "le87271eqct",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "LE87271EQCT",
    "manufacturer": "Microchip Tech",
    "package": "QFN-20-EP(4x4)",
    "pin_count": 21,
    "category": "Communication Interface Chip/UART/485/232",
    "subcategory": "Telecommunication Interface ICs",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/973cc0929177ed0abc4daa1fa649f43a.pdf",
    "parts": {
      "symbol": "le87271eqct.kicad_sym",
      "footprint": "le87271eqct.kicad_mod",
      "model_3d": "le87271eqct-hero.glb",
      "model_3d_plain": "le87271eqct-etched.glb",
      "model_3d_step": "le87271eqct-etched.step",
      "model_3d_step_plain": "le87271eqct.step",
      "lbr": "le87271eqct.lbr"
    },
    "distributor_links": {
      "lcsc": "C3679570",
      "digikey": "150-LE87271EQTR-ND",
      "mouser": "494-LE87271EQCT"
    },
    "distributor_check": {
      "checked_at": "2026-10-30T16:39:03Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "150-LE87271EQTR-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "494-LE87271EQCT",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect, no internal connection."
      },
      {
        "number": "2",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect, no internal connection."
      },
      {
        "number": "3",
        "name": "C0",
        "type": "input",
        "description": "Tri-state logic-level state control input with an internal resistor pulling to the middle level when undriven (VIH 2.0 V min, VIL 0.8 V max, VIM 1.4 to 1.6 V on C0)."
      },
      {
        "number": "4",
        "name": "C1",
        "type": "input",
        "description": "Logic-level state control input with an internal pull-down resistor (VIH 2.0 V min, VIL 0.8 V max)."
      },
      {
        "number": "5",
        "name": "C2",
        "type": "input",
        "description": "Logic-level state control input with an internal pull-down resistor (VIH 2.0 V min, VIL 0.8 V max)."
      },
      {
        "number": "6",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect, no internal connection."
      },
      {
        "number": "7",
        "name": "IREF",
        "type": "passive",
        "description": "Bias current reference pin, connected through RREF (75 kΩ typical) to ground."
      },
      {
        "number": "8",
        "name": "VDD",
        "type": "power_in",
        "description": "Power supply pin, 12.6 V to 15.4 V (14 V typical), tied together with VDD_P and VDD_N."
      },
      {
        "number": "9",
        "name": "VDD_N",
        "type": "power_in",
        "description": "Power supply pin for the N output side, 12.6 V to 15.4 V (14 V typical), tied together with VDD and VDD_P."
      },
      {
        "number": "10",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect, no internal connection."
      },
      {
        "number": "11",
        "name": "OUT_N",
        "type": "output",
        "description": "Line driver differential output (negative), high impedance in power-down and thermal shut-down."
      },
      {
        "number": "12",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect, no internal connection."
      },
      {
        "number": "13",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground pin."
      },
      {
        "number": "14",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect, no internal connection."
      },
      {
        "number": "15",
        "name": "OUT_P",
        "type": "output",
        "description": "Line driver differential output (positive), high impedance in power-down and thermal shut-down."
      },
      {
        "number": "16",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect, no internal connection."
      },
      {
        "number": "17",
        "name": "VDD_P",
        "type": "power_in",
        "description": "Power supply pin for the P output side, 12.6 V to 15.4 V (14 V typical), tied together with VDD and VDD_N."
      },
      {
        "number": "18",
        "name": "VDD",
        "type": "power_in",
        "description": "Power supply pin, 12.6 V to 15.4 V (14 V typical), tied together with VDD_P and VDD_N."
      },
      {
        "number": "19",
        "name": "IN_P",
        "type": "input",
        "description": "Line driver differential input (positive), 15 kΩ typical differential input impedance."
      },
      {
        "number": "20",
        "name": "IN_N",
        "type": "input",
        "description": "Line driver differential input (negative), 15 kΩ typical differential input impedance."
      },
      {
        "number": "21",
        "name": "EP",
        "type": "passive",
        "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
      }
    ],
    "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: Exposed pad has no pin number in the datasheet text; labeled 'EP' by convention. It is internally co; Pin Type column is blank for IREF, VDD, VDD_N, VDD_P and NC pins; types were inferred from the descr; Pin diagram (Figure 2) is an image and not in the text; the pin table was used. Package drawing dime"
        ],
        "pages_sent": 17,
        "cost_usd": 0.1097,
        "at": "2026-10-30T16:38:54"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/973cc0929177ed0abc4daa1fa649f43a.pdf",
        "pages": 17,
        "sha256": "aa10e9981fec82b6",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 21,
        "described": 21,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
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    "models_3d": [
      {
        "file": "le87271eqct.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          4,
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        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "c9476a1612023de37f27b4972110ab6ac6dc0eaf5ac48957a2e1c497650082a5",
        "checked": "2026-10-30",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "le87271eqct-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "centre_offset_mm": 0,
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        "sha256": "5b92462a83c3477bde6a3612030ba6479c0817f7ac5f3e0a7a9e5adf4c98202a",
        "checked": "2026-10-30",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "Microchip Tech",
      "Package": "QFN-20-EP(4x4)",
      "Category": "Communication Interface Chip/UART/485/232",
      "Pins": "21"
    },
    "appearance": {
      "contacts": {
        "quote": "and antimony-free materials. The leads possess a matte-tin plating, which is compatible with conventional board assembly processes or newer lead-free board assembly processes.",
        "page": 8,
        "doc": "ds.pdf",
        "plating": "tin"
      },
      "version": 1,
      "datasheet_sha256": "aa10e9981fec82b65e372b096abb6c1be82956ca6eba549e398918bce05ffd71"
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    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "aa10e9981fec82b65e372b096abb6c1be82956ca6eba549e398918bce05ffd71",
      "rows": [
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          "name": "Quiescent supply current ATX4",
          "symbol": "IVDD",
          "kind": "electrical",
          "unit": "mA",
          "min": 14.8,
          "typ": 17.4,
          "max": 20,
          "conditions": "ATX4",
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        },
        {
          "name": "Quiescent supply current ATX3",
          "symbol": "IVDD",
          "kind": "electrical",
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          "min": 13.3,
          "typ": 15.6,
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        {
          "name": "Quiescent supply current ATX2",
          "symbol": "IVDD",
          "kind": "electrical",
          "unit": "mA",
          "min": 10.7,
          "typ": 12.6,
          "max": 14.5,
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        },
        {
          "name": "Quiescent supply current ATX1",
          "symbol": "IVDD",
          "kind": "electrical",
          "unit": "mA",
          "min": 9.4,
          "typ": 11,
          "max": 12.7,
          "conditions": "ATX1",
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        },
        {
          "name": "Quiescent supply current VTX4",
          "symbol": "IVDD",
          "kind": "electrical",
          "unit": "mA",
          "min": 19.3,
          "typ": 22.7,
          "max": 26.1,
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        {
          "name": "Quiescent supply current VTX3",
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          "max": 24,
          "conditions": "VTX3",
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          "name": "Quiescent supply current VTX2",
          "symbol": "IVDD",
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          "min": 15.1,
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          "name": "Quiescent supply current VTX1",
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          "kind": "electrical",
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          "min": 13.7,
          "typ": 16.1,
          "max": 18.5,
          "conditions": "VTX1",
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          "source": "datasheet"
        },
        {
          "name": "Quiescent supply current, power down",
          "symbol": "IVDD",
          "kind": "electrical",
          "unit": "mA",
          "min": 0.4,
          "typ": 0.6,
          "max": 0.8,
          "conditions": "Power down state",
          "source_page": 10,
          "source": "datasheet"
        },
        {
          "name": "Gain",
          "symbol": "AV",
          "kind": "electrical",
          "unit": "V/V",
          "min": 7.88,
          "typ": 8.03,
          "max": 8.2,
          "conditions": "",
          "source_page": 10,
          "source": "datasheet"
        },
        {
          "name": "Gain flatness",
          "symbol": "AVF",
          "kind": "electrical",
          "unit": "dB",
          "min": -0.3,
          "typ": null,
          "max": 0.3,
          "conditions": "f < Signal BW",
          "source_page": 10,
          "source": "datasheet"
        },
        {
          "name": "Input impedance",
          "symbol": "RI",
          "kind": "electrical",
          "unit": "kΩ",
          "min": 12,
          "typ": 15,
          "max": 18,
          "conditions": "Differential",
          "source_page": 10,
          "source": "datasheet"
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        {
          "name": "Input middle voltage C0",
          "symbol": "VIM",
          "kind": "electrical",
          "unit": "V",
          "min": 1.4,
          "typ": 1.5,
          "max": 1.6,
          "conditions": "C0",
          "source_page": 10,
          "source": "datasheet"
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        {
          "name": "Input high voltage",
          "symbol": "VIH",
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          "min": 2,
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          "max": null,
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          "name": "Input low voltage",
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          "kind": "electrical",
          "unit": "µA",
          "min": 15,
          "typ": 50,
          "max": 85,
          "conditions": "VIH = 3 V, C0",
          "source_page": 10,
          "source": "datasheet"
        },
        {
          "name": "Input high current C1, C2",
          "symbol": "IIH",
          "kind": "electrical",
          "unit": "µA",
          "min": 60,
          "typ": 120,
          "max": 180,
          "conditions": "VIH = 3 V, C1, C2",
          "source_page": 11,
          "source": "datasheet"
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        {
          "name": "Input low current C0",
          "symbol": "IIL",
          "kind": "electrical",
          "unit": "µA",
          "min": -85,
          "typ": -50,
          "max": -15,
          "conditions": "VIL = 0 V, C0",
          "source_page": 11,
          "source": "datasheet"
        },
        {
          "name": "Input low current C1, C2",
          "symbol": "IIL",
          "kind": "electrical",
          "unit": "µA",
          "min": -2,
          "typ": 0,
          "max": 2,
          "conditions": "VIL = 0 V, C1, C2",
          "source_page": 11,
          "source": "datasheet"
        },
        {
          "name": "Supply voltage VDD with respect to VSS (abs max)",
          "symbol": "VDD",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
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          "max": 16,
          "conditions": "VDD with respect to VSS",
          "source_page": 8,
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        {
          "name": "Control inputs with respect to VSS (abs max)",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
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          "max": 4,
          "conditions": "Control inputs with respect to VSS",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Junction temperature (abs max)",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Supply voltage VDD/VDD_P/VDD_N",
          "symbol": "VDD",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 12.6,
          "typ": 14,
          "max": 15.4,
          "conditions": "",
          "source_page": 9,
          "source": "datasheet"
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        {
          "name": "Ambient temperature",
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          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": 25,
          "max": 85,
          "conditions": "",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Line impedance",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "Ω",
          "min": 80,
          "typ": 100,
          "max": 150,
          "conditions": "",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Maximum device power dissipation, continuous",
          "symbol": "",
          "kind": "thermal",
          "unit": "W",
          "min": null,
          "typ": null,
          "max": 1.37,
          "conditions": "TA = 150 °C",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Junction to ambient thermal resistance",
          "symbol": "θJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 47.5,
          "max": null,
          "conditions": "4-layer JEDEC PCB, 12 thermal vias, still air",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Junction-to-board thermal resistance",
          "symbol": "θJB",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 25.8,
          "max": null,
          "conditions": "",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Junction-to-case bottom (exposed pad) thermal resistance",
          "symbol": "θJP",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 11.7,
          "max": null,
          "conditions": "",
          "source_page": 8,
          "source": "datasheet"
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        {
          "name": "Junction-to-top characterization parameter",
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          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 30.8,
          "max": null,
          "conditions": "",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Supply power",
          "symbol": "PVDD",
          "kind": "electrical",
          "unit": "mW",
          "min": null,
          "typ": 600,
          "max": null,
          "conditions": "PLine = 13 dBm",
          "source_page": 10,
          "source": "datasheet"
        },
        {
          "name": "Output voltage",
          "symbol": "VOUT",
          "kind": "electrical",
          "unit": "Vpkd",
          "min": null,
          "typ": 10.5,
          "max": null,
          "conditions": "Between OUT_P/N",
          "source_page": 10,
          "source": "datasheet"
        },
        {
          "name": "Drive current",
          "symbol": "IOUT",
          "kind": "electrical",
          "unit": "mApk",
          "min": null,
          "typ": 240,
          "max": null,
          "conditions": "Through OUT_P/N",
          "source_page": 10,
          "source": "datasheet"
        },
        {
          "name": "Logic input impedance",
          "symbol": "Zin",
          "kind": "electrical",
          "unit": "kΩ",
          "min": null,
          "typ": 25,
          "max": null,
          "conditions": "",
          "source_page": 11,
          "source": "datasheet"
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      ]
    }
  },
  "variants": [],
  "sections": [
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    "viewers",
    "readme",
    "breadcrumbs",
    "info"
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  "discovery_triggers": [
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  ],
  "discovery_pitch": "LE87271EQCT (Microchip Tech) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
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