HE4054B

{
  "slug": "he4054b",
  "version": "0.1.0",
  "type": "component",
  "description": "HEERMICR Battery Management ICs, SOT-23-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management ics",
    "he4054b",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "he4054b.kicad_sym",
    "he4054b.kicad_mod",
    "he4054b.glb",
    "he4054b.step",
    "he4054b.lbr",
    "docs/hero.png",
    "docs/he4054b-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "he4054b-hero.glb",
    "he4054b-hero.overlay.json",
    "he4054b-etched.glb"
  ],
  "component": {
    "mpn": "HE4054B",
    "manufacturer": "HEERMICR",
    "package": "SOT-23-5",
    "pin_count": 5,
    "category": "Power Management ICs",
    "subcategory": "Battery Management ICs",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/ee4c8b48a35241f59df5ecacefcd8bc7.pdf",
    "parts": {
      "symbol": "he4054b.kicad_sym",
      "footprint": "he4054b.kicad_mod",
      "model_3d": "he4054b-hero.glb",
      "model_3d_plain": "he4054b-etched.glb",
      "model_3d_step": "he4054b-etched.step",
      "model_3d_step_plain": "he4054b.step",
      "lbr": "he4054b.lbr"
    },
    "distributor_links": {
      "lcsc": "C711953"
    },
    "distributor_check": {
      "checked_at": "2026-10-23T09:08:54Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "CHRG",
        "type": "output",
        "description": "Open-drain charge status output pulled low by an internal N-channel MOSFET while charging, high-impedance when charging is complete or in undervoltage lockout."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "3",
        "name": "BAT",
        "type": "power_out",
        "description": "Charge current output to the battery that regulates the final float voltage to 4.2V, with reverse-battery protection drawing about 0.7mA between GND and BAT."
      },
      {
        "number": "4",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply input from 4.25V to 6.5V that requires a bypass capacitor of at least 1µF, entering shutdown when VCC is within 30mV of BAT."
      },
      {
        "number": "5",
        "name": "PROG",
        "type": "bidirectional",
        "description": "Charge current program, monitor and shutdown pin set by a 1% resistor to ground (IBAT = VPROG/RPROG x 1000) with 1V in constant-current mode, shutdown above 1.21V and clamp voltage of about 2.4V."
      }
    ],
    "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: Package is printed as SOT23-5L / SOT-23-5L; mapped to the SOT-23-5 hint. PROG type chosen as bidirec"
        ],
        "pages_sent": 11,
        "cost_usd": 0.0624,
        "at": "2026-10-23T09:08:31"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/ee4c8b48a35241f59df5ecacefcd8bc7.pdf",
        "pages": 11,
        "sha256": "f39009cae08f9466",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 5,
        "described": 5,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "he4054b.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.8,
          2.9,
          1.55
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "720a6eab0024069bbee68e7cb4c3ff1149468a34611225cdc852662c5d0ec2b7",
        "checked": "2026-10-23",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "he4054b-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.8,
          2.9,
          1.55
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "c460276ce1ba37dcceb8a23f205922a1cc940c0c78d83af1af2f8f10c34f2650",
        "checked": "2026-10-23",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}