MCP73871T-2CCI

{
  "slug": "mcp73871t-2cci",
  "version": "0.1.0",
  "type": "component",
  "description": "Microchip Tech Battery Management, QFN-20-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management (pmic)",
    "mcp73871t-2cci",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "mcp73871t-2cci.kicad_sym",
    "mcp73871t-2cci.kicad_mod",
    "mcp73871t-2cci.glb",
    "mcp73871t-2cci.step",
    "mcp73871t-2cci.lbr",
    "docs/hero.png",
    "docs/mcp73871t-2cci-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "mcp73871t-2cci-hero.glb",
    "mcp73871t-2cci-hero.overlay.json"
  ],
  "component": {
    "mpn": "MCP73871T-2CCI",
    "manufacturer": "Microchip Tech",
    "package": "QFN-20-EP(4x4)",
    "pin_count": 21,
    "category": "Power Management (PMIC)",
    "subcategory": "Battery Management",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588912739641540608",
    "parts": {
      "symbol": "mcp73871t-2cci.kicad_sym",
      "footprint": "mcp73871t-2cci.kicad_mod",
      "model_3d": "mcp73871t-2cci-hero.glb",
      "model_3d_plain": "mcp73871t-2cci.glb",
      "model_3d_step": "mcp73871t-2cci-etched.step",
      "model_3d_step_plain": "mcp73871t-2cci.step",
      "lbr": "mcp73871t-2cci.lbr"
    },
    "distributor_links": {
      "lcsc": "C511310"
    },
    "distributor_check": {
      "checked_at": "2026-10-09T21:52:00Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "deferred",
        "error": "shared DigiKey quota guard: 547 calls left today"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "OUT",
        "type": "power_out",
        "description": "System output terminal that powers the system while the battery charges independently; bypass to VSS with a minimum of 4.7 µF is recommended."
      },
      {
        "number": "2",
        "name": "VPCC",
        "type": "input",
        "description": "Voltage proportional charge control input; supply 1.23V or greater to enable the feature, or connect it to IN to disable it."
      },
      {
        "number": "3",
        "name": "SEL",
        "type": "input",
        "description": "Input source type selection: low selects the USB port input, high selects the AC-DC adapter input."
      },
      {
        "number": "4",
        "name": "PROG2",
        "type": "input",
        "description": "USB-port input current limit selection when SEL is low: low = 100 mA, high = 500 mA."
      },
      {
        "number": "5",
        "name": "THERM",
        "type": "bidirectional",
        "description": "Thermistor monitoring input and bias current for battery cell temperature monitoring."
      },
      {
        "number": "6",
        "name": "PG",
        "type": "output",
        "description": "Power Good status output, open-drain; low whenever the input is above the UVLO threshold and greater than the battery voltage."
      },
      {
        "number": "7",
        "name": "STAT2",
        "type": "output",
        "description": "Charge status output 2, open-drain, for an LED or a pull-up to a host microcontroller."
      },
      {
        "number": "8",
        "name": "STAT1/LBO",
        "type": "output",
        "description": "Charge status output 1, open-drain; acts as the low battery output indicator when VBAT > VIN."
      },
      {
        "number": "9",
        "name": "TE",
        "type": "input",
        "description": "Timer enable input; enables the safety timer when active-low."
      },
      {
        "number": "10",
        "name": "VSS",
        "type": "power_in",
        "description": "Battery management 0V reference; connect to the battery negative terminal, system load and input supply, and to the same potential as EP on the PCB."
      },
      {
        "number": "11",
        "name": "VSS",
        "type": "power_in",
        "description": "Battery management 0V reference; connect to the battery negative terminal, system load and input supply, and to the same potential as EP on the PCB."
      },
      {
        "number": "12",
        "name": "PROG3",
        "type": "bidirectional",
        "description": "Termination set point for both the AC-DC adapter and USB port input."
      },
      {
        "number": "13",
        "name": "PROG1",
        "type": "bidirectional",
        "description": "Fast charge current regulation setting when SEL is high; also the preconditioning set point for both USB port and AC-DC adapter; the maximum constant charge current is set by a resistor from PROG1 to VSS."
      },
      {
        "number": "14",
        "name": "VBAT",
        "type": "power_in",
        "description": "Battery positive input and output connection; bypass to VSS with a minimum of 4.7 µF for loop stability when the battery is disconnected."
      },
      {
        "number": "15",
        "name": "VBAT",
        "type": "power_in",
        "description": "Battery positive input and output connection; bypass to VSS with a minimum of 4.7 µF for loop stability when the battery is disconnected."
      },
      {
        "number": "16",
        "name": "VBAT_SENSE",
        "type": "bidirectional",
        "description": "Battery voltage sense; connect to the positive battery terminal, where a precision internal sense regulates the final voltage to VREG."
      },
      {
        "number": "17",
        "name": "CE",
        "type": "input",
        "description": "Device charge enable; charging is enabled when CE is high, and the input must not be left floating."
      },
      {
        "number": "18",
        "name": "IN",
        "type": "power_in",
        "description": "Power supply input; a supply of VREG + 0.3V to 6V is recommended, bypassed to VSS with a minimum of 4.7 µF."
      },
      {
        "number": "19",
        "name": "IN",
        "type": "power_in",
        "description": "Power supply input; a supply of VREG + 0.3V to 6V is recommended, bypassed to VSS with a minimum of 4.7 µF."
      },
      {
        "number": "20",
        "name": "OUT",
        "type": "power_out",
        "description": "System output terminal that powers the system while the battery charges independently; bypass to VSS with a minimum of 4.7 µF is recommended."
      },
      {
        "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-haiku-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Pinout taken from Table 3-1 (Pin Function Table) on page 17. The package outline drawing on page 32 ; The MCP73871T-2CCI is the tape-and-reel ordering option of MCP73871-2CCI/ML (marking 2CC). The datas; KiCad ERC types were mapped from the datasheet I/O column: IN and VSS as power_in, OUT as power_out,",
          "exposed pad 21 added from the footprint",
          "dropped thermal pad ['EP'] absent from footprint"
        ],
        "pages_sent": 7,
        "cost_usd": 0.0562,
        "at": "2026-10-09T21:50:02"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588912739641540608",
        "pages": 40,
        "sha256": "13e2e4e9e41f5b5b",
        "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"
    },
    "models_3d": [
      {
        "file": "mcp73871t-2cci.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.0,
          4.0,
          0.77
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "c9476a1612023de37f27b4972110ab6ac6dc0eaf5ac48957a2e1c497650082a5",
        "checked": "2026-10-09",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "mcp73871t-2cci-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.0,
          4.0,
          0.77
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "1a24b3b53b6bc83d88c6946617cd88ca97777c37d7b93ba32dfe9a416c8cb4f7",
        "checked": "2026-10-09",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}