ETA9740E8A

{
  "slug": "eta9740e8a",
  "version": "0.1.0",
  "type": "component",
  "description": "etasolution Battery Management, ESOP8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management (pmic)",
    "eta9740e8a",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "eta9740e8a.kicad_sym",
    "eta9740e8a.kicad_mod",
    "eta9740e8a.glb",
    "eta9740e8a.step",
    "eta9740e8a.lbr",
    "docs/hero.png",
    "docs/eta9740e8a-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "eta9740e8a-hero.glb",
    "eta9740e8a-hero.overlay.json",
    "eta9740e8a-etched.glb"
  ],
  "component": {
    "mpn": "ETA9740E8A",
    "manufacturer": "etasolution",
    "package": "ESOP8",
    "pin_count": 9,
    "category": "Power Management (PMIC)",
    "subcategory": "Battery Management",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590905163924389888",
    "parts": {
      "symbol": "eta9740e8a.kicad_sym",
      "footprint": "eta9740e8a.kicad_mod",
      "model_3d": "eta9740e8a-hero.glb",
      "model_3d_plain": "eta9740e8a-etched.glb",
      "model_3d_step": "eta9740e8a-etched.step",
      "model_3d_step_plain": "eta9740e8a.step",
      "lbr": "eta9740e8a.lbr"
    },
    "distributor_links": {
      "lcsc": "C7465512"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T11:27:56Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "SW",
        "type": "output",
        "description": "Inductor connection: connect an inductor between SW and the regulator output."
      },
      {
        "number": "2",
        "name": "LED1",
        "type": "output",
        "description": "Fuel gauge LED1 and LED2 connection pin."
      },
      {
        "number": "3",
        "name": "LED2",
        "type": "output",
        "description": "Fuel gauge LED3 and LED4 connection pin (as printed; the name LED2 and the description do not match, see review notes)."
      },
      {
        "number": "4",
        "name": "LED3",
        "type": "output",
        "description": "Fuel gauge LED1, LED2, LED3 and LED4 connection pin (as printed in the datasheet)."
      },
      {
        "number": "5",
        "name": "ISET",
        "type": "passive",
        "description": "Buck charging current setting pin: connect a resistor between this pin and analog ground to set the charge current level."
      },
      {
        "number": "6",
        "name": "BAT",
        "type": "bidirectional",
        "description": "Battery pin: connect the Li-ion battery here and place a 10uF bypass capacitor with it."
      },
      {
        "number": "7",
        "name": "OUT",
        "type": "bidirectional",
        "description": "Output pin: bypass with a 22uF or larger ceramic capacitor placed close between this pin and GND."
      },
      {
        "number": "8",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground pin."
      },
      {
        "number": "9",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground pin, also the exposed pad of the ESOP-8 package."
      }
    ],
    "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: Pin descriptions in the datasheet are inconsistent with pin names: pin 3 is named LED2 but its descr; The datasheet prints pin 9 as '/ Exposed Pad'. It is listed here as pin 9 (AGND, exposed pad) since ; KiCad ERC types for SW, LED pins, BAT and OUT are inferred from the function text, not stated by the"
        ],
        "pages_sent": 5,
        "cost_usd": 0.0312,
        "at": "2026-10-18T11:26:58"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590905163924389888",
        "pages": 5,
        "sha256": "ae4c4d10be8f1025",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 9,
        "described": 9,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "eta9740e8a.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          4.9,
          1.55
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "2d6f7e774e8143e3320cbd59eb5be9f3b7864614644e3b072006e1eb05fb7fa6",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "eta9740e8a-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          4.9,
          1.55
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "7c5c3ef5b365e5f84878afc619ca8b6264b478bf49d604d2c922a6adbd754503",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}