DS6521AFF8

{
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  "type": "component",
  "slug": "ds6521aff8",
  "title": "DS6521AFF8",
  "brief": "DSTECH Battery Management, SOP-8-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
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    "power management (pmic)",
    "ds6521aff8",
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  "component": {
    "mpn": "DS6521AFF8",
    "manufacturer": "DSTECH",
    "package": "SOP-8-EP",
    "pin_count": 9,
    "category": "Power Management (PMIC)",
    "subcategory": "Battery Management",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590910851577044992",
    "parts": {
      "symbol": "ds6521aff8.kicad_sym",
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      "lbr": "ds6521aff8.lbr"
    },
    "distributor_links": {
      "lcsc": "C5884237"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T23:06:33Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "TS",
        "type": "input",
        "description": "Connects to the battery pack NTC thermistor (10 kΩ or 100 kΩ at 25 °C) for temperature sensing; tie TS directly to GND if temperature detection is not needed."
      },
      {
        "number": "2",
        "name": "ISET",
        "type": "input",
        "description": "Programs the fast-charge current: an external resistor from ISET to GND sets ICHG = VISET / RISET × 1000 with VISET = 1 V, and the programmable range is 50 mA to 1 A."
      },
      {
        "number": "3",
        "name": "VIN",
        "type": "power_in",
        "description": "Input supply pin, recommended operating range 4.5 V to 24 V, with 6 V input overvoltage protection and a 28 V input rating."
      },
      {
        "number": "4",
        "name": "VCC",
        "type": "power_out",
        "description": "Internal regulator output; a 0.1 µF to 1 µF capacitor to ground is recommended."
      },
      {
        "number": "5",
        "name": "BAT",
        "type": "power_out",
        "description": "Connects to the battery, which may also connect the system load; a bypass capacitor of 10 µF to 22 µF is recommended."
      },
      {
        "number": "6",
        "name": "CHG",
        "type": "output",
        "description": "Charge status output: low (FET on) indicates charging, and open (FET off) indicates no charging or charge complete."
      },
      {
        "number": "7",
        "name": "EN",
        "type": "input",
        "description": "Chip enable with 1.5 V rising and 0.4 V falling thresholds; at EN = 0 V the standby current IQS is 80 µA maximum at VIN = 5 V."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for the device."
      },
      {
        "number": "9",
        "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: The page-2 pin table has no explicit column header per row in the extracted text. The ESOP-8 numberi; Pin types for BAT (power_out vs bidirectional), ISET (input vs passive), and the exposed pad PGND (p; The datasheet gives no spec field in this output schema; the headline ratings (VIN 4.5–24 V, 28 V ra",
          "exposed pad 9 added from the footprint",
          "dropped thermal pad ['EP'] absent from footprint"
        ],
        "pages_sent": 15,
        "cost_usd": 0.0685,
        "at": "2026-10-18T23:04:24"
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      "datasheet": {
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        "pages": 15,
        "sha256": "e4ba68fabe077547",
        "source_tier": "lcsc"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 9,
        "described": 9,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
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      "footprint": "viewers/footprint.html"
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        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          4.9,
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "2d6f7e774e8143e3320cbd59eb5be9f3b7864614644e3b072006e1eb05fb7fa6",
        "checked": "2026-10-18",
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    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "DSTECH",
      "Package": "SOP-8-EP",
      "Category": "Power Management (PMIC)",
      "Pins": "9"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "e4ba68fabe077547d5a25b3c182e6014eb83136987e554bf32b895ddb2d8e355",
      "rows": [
        {
          "name": "Input voltage",
          "symbol": "VIN",
          "kind": "electrical",
          "unit": "V",
          "min": 4.5,
          "typ": null,
          "max": 24,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Battery output voltage, Type A (4.2V)",
          "symbol": "VBAT",
          "kind": "electrical",
          "unit": "V",
          "min": 4.16,
          "typ": 4.2,
          "max": 4.24,
          "conditions": "ICHG = 25mA",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Fast charge current tolerance, ICHG > 100mA",
          "symbol": "",
          "kind": "tolerance",
          "unit": "%",
          "min": -10,
          "typ": null,
          "max": 10,
          "conditions": "ICHG > 100mA",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Fast charge current tolerance, ICHG < 100mA",
          "symbol": "",
          "kind": "tolerance",
          "unit": "mA",
          "min": -10,
          "typ": null,
          "max": 10,
          "conditions": "ICHG < 100mA",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Input voltage (recommended operating)",
          "symbol": "VIN",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 4.5,
          "typ": null,
          "max": 24,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Application junction temperature range",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "oC",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Application ambient temperature range",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "oC",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "VIN / EN / CHG / TEM to GND",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 28,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "BAT to GND",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 15,
          "conditions": "",
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        },
        {
          "name": "Other to GND",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 6,
          "conditions": "",
          "source_page": 4,
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        },
        {
          "name": "Junction temperature",
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          "unit": "oC",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 4,
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        },
        {
          "name": "Storage temperature range",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "oC",
          "min": -60,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Lead soldering temperature",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "oC",
          "min": null,
          "typ": null,
          "max": 260,
          "conditions": "10 sec.",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "ESD HBM",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "KV",
          "min": null,
          "typ": null,
          "max": 2,
          "conditions": "",
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          "source": "datasheet"
        },
        {
          "name": "ESD MM",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 200,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Thermal resistance junction-to-ambient, ESOP-8",
          "symbol": "θJA",
          "kind": "thermal",
          "unit": "oC /W",
          "min": null,
          "typ": 75,
          "max": null,
          "conditions": "TA = 25°C, DSTECH EVB board (Note 2)",
          "source_page": 4,
          "source": "datasheet"
        }
      ]
    }
  },
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  "discovery_pitch": "DS6521AFF8 (DSTECH) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
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