CH221K

{
  "schema_version": 1,
  "type": "component",
  "slug": "ch221k",
  "title": "CH221K",
  "brief": "WCH(Nanjing Qinheng) Others, SOT-23-6. 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",
    "others",
    "ch221k",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "CH221K",
    "manufacturer": "WCH(Nanjing Qinheng)",
    "package": "SOT-23-6",
    "pin_count": 6,
    "category": "Others",
    "subcategory": "Others",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8618867384841089024",
    "parts": {
      "symbol": "ch221k.kicad_sym",
      "footprint": "ch221k.kicad_mod",
      "model_3d": "ch221k-hero.glb",
      "model_3d_plain": "ch221k-etched.glb",
      "model_3d_step": "ch221k-etched.step",
      "model_3d_step_plain": "ch221k.step",
      "lbr": "ch221k.lbr"
    },
    "distributor_links": {
      "lcsc": "C5125736"
    },
    "distributor_check": {
      "checked_at": "2026-10-17T02:21:32Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VDD",
        "type": "power_in",
        "description": "Working power input: add a 1uF capacitor to GND and a series resistor to VBUS; the absolute maximum VDD is 5.8 V and the internal LDO regulates VDD to 3.0-3.6 V (3.3 V typical)."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Common ground pin."
      },
      {
        "number": "3",
        "name": "PG",
        "type": "bidirectional",
        "description": "Default Power Good indicator, active low, open-drain output with a customizable function; the absolute maximum voltage on PG is 13.5 V."
      },
      {
        "number": "4",
        "name": "CC1",
        "type": "bidirectional",
        "description": "Type-C CC signal line; the absolute maximum voltage on CC1 is 8 V."
      },
      {
        "number": "5",
        "name": "CC2",
        "type": "bidirectional",
        "description": "Type-C CC signal line; the absolute maximum voltage on CC2 is 8 V."
      },
      {
        "number": "6",
        "name": "CFG",
        "type": "input",
        "description": "Power-level configuration input pin, used with a single-resistor (Rset to GND) or I/O-level configuration; the datasheet lists its pin type as open-drain (OD)."
      }
    ],
    "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 datasheet pin type is 'I,OD' (input, open-drain), which has no direct KiCad ERC class; bidirecti; The datasheet pin type for CFG is 'OD' (open-drain) while the description calls it a configuration i; The SOT23-6 pinout (pins 1-6) is given in the pin definition table on page 4 and matches the package"
        ],
        "pages_sent": 16,
        "cost_usd": 0.053,
        "at": "2026-10-17T02:19:35"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8618867384841089024",
        "pages": 16,
        "sha256": "df4f8a9f305df715",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 6,
        "described": 6,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "ch221k.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,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "c9fe686b4d1b56927a41fa84a9bc1efb61d8a45a123a3db43bcaa05c2891d635",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ch221k-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,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "cfcc73412265fa18e1bfa5827625eb1b7176c27b79bd35a53732f2d724fb386b",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "WCH(Nanjing Qinheng)",
      "Package": "SOT-23-6",
      "Category": "Others",
      "Pins": "6"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "df4f8a9f305df715b1c3617e89505faaa2223a0e4053b44373c5deb565b63c0d",
      "rows": [
        {
          "name": "Operating ambient temperature (工作时的环境温度) TA",
          "symbol": "TA",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -40,
          "typ": null,
          "max": 105,
          "conditions": "",
          "source_page": 13,
          "source": "datasheet"
        },
        {
          "name": "Storage ambient temperature (储存时的环境温度) TS",
          "symbol": "TS",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -55,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 13,
          "source": "datasheet"
        },
        {
          "name": "Supply voltage VDD (工作电源电压)",
          "symbol": "VDD",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": 5.8,
          "conditions": "VDD pin connected to supply, GND pin connected to ground",
          "source_page": 13,
          "source": "datasheet"
        },
        {
          "name": "Voltage on high-voltage open-drain pin PG (VODHV)",
          "symbol": "VODHV",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": 13.5,
          "conditions": "",
          "source_page": 13,
          "source": "datasheet"
        },
        {
          "name": "Voltage on CC1, CC2 pins (VIOCC)",
          "symbol": "VIOCC",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": 8,
          "conditions": "",
          "source_page": 13,
          "source": "datasheet"
        },
        {
          "name": "Voltage on CFG pin (VIOUX)",
          "symbol": "VIOUX",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": null,
          "conditions": "Printed maximum is VDD+0.5 V (not a fixed number)",
          "source_page": 13,
          "source": "datasheet"
        },
        {
          "name": "Total chip maximum power dissipation (PD)",
          "symbol": "PD",
          "kind": "absolute_maximum",
          "unit": "mW",
          "min": null,
          "typ": null,
          "max": 250,
          "conditions": "VDD voltage × current",
          "source_page": 13,
          "source": "datasheet"
        },
        {
          "name": "Internal regulator VDD shunt regulation voltage (内部电源调节器VDD并联稳压)",
          "symbol": "VLDOK",
          "kind": "electrical",
          "unit": "V",
          "min": 3,
          "typ": 3.3,
          "max": 3.6,
          "conditions": "TA = 25℃",
          "source_page": 14,
          "source": "datasheet"
        },
        {
          "name": "Internal regulator VDD shunt sink current capability (内部电源调节器VDD并联吸收电流能力)",
          "symbol": "ILDO",
          "kind": "electrical",
          "unit": "mA",
          "min": 0,
          "typ": null,
          "max": 30,
          "conditions": "TA = 25℃",
          "source_page": 14,
          "source": "datasheet"
        },
        {
          "name": "Power-on reset voltage threshold (电源上电复位的电压门限)",
          "symbol": "VR",
          "kind": "electrical",
          "unit": "V",
          "min": 2.2,
          "typ": 2.4,
          "max": 2.6,
          "conditions": "TA = 25℃",
          "source_page": 14,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "ch221k"
  ],
  "discovery_pitch": "CH221K (WCH(Nanjing Qinheng)) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "ch221k.kicad_sym",
    "ch221k.kicad_mod",
    "ch221k.glb",
    "ch221k.step",
    "ch221k.lbr",
    "docs/hero.png",
    "docs/ch221k-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "ch221k-hero.glb",
    "ch221k-hero.overlay.json",
    "ch221k-etched.glb"
  ],
  "visibility": {
    "public": true
  }
}