AI04

{
  "schema_version": 1,
  "type": "component",
  "slug": "ai04",
  "title": "AI04",
  "brief": "Sam wing Touch Sensors, SOP-14. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "sensor",
    "ai04"
  ],
  "component": {
    "mpn": "AI04",
    "manufacturer": "Sam wing",
    "package": "SOP-14",
    "pin_count": 14,
    "category": "Sensor",
    "subcategory": "Touch Sensors",
    "datasheet": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2210171730_Sam-wing-AI04_C5199869.pdf",
    "parts": {
      "symbol": "ai04.kicad_sym",
      "footprint": "ai04.kicad_mod",
      "model_3d": "ai04-etched.glb",
      "model_3d_plain": "ai04.glb",
      "model_3d_step": "ai04-etched.step",
      "model_3d_step_plain": "ai04.step",
      "lbr": "ai04.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "GND",
        "type": "power_in",
        "description": "Power ground (电源地). Reference 0V for the device."
      },
      {
        "number": "2",
        "name": "C1",
        "type": "passive",
        "description": "Internal reference/balance capacitor connection (内部基准电容). Connect a 4.7nF capacitor to GND (range 1nF-10nF). Use NPO 10% dielectric placed close to the IC."
      },
      {
        "number": "3",
        "name": "CSEL",
        "type": "passive",
        "description": "Sensitivity-adjust capacitor connection (灵敏度调节电容接口). Connect 0-100pF to GND; smaller value increases sensitivity, larger value increases noise immunity. Typically left floating (0pF) but a placeholder pad is recommended."
      },
      {
        "number": "4",
        "name": "KEY1",
        "type": "input",
        "description": "Capacitive touch sensing input for channel 1 (触摸按键/感应天线). Connect through a 1kΩ series resistor to the touch pad. Sensed capacitance range 0.2-200pF."
      },
      {
        "number": "5",
        "name": "KEY2",
        "type": "input",
        "description": "Capacitive touch sensing input for channel 2. Connect through a 1kΩ series resistor to the touch pad."
      },
      {
        "number": "6",
        "name": "KEY3",
        "type": "input",
        "description": "Capacitive touch sensing input for channel 3. Connect through a 1kΩ series resistor to the touch pad."
      },
      {
        "number": "7",
        "name": "KEY4",
        "type": "input",
        "description": "Capacitive touch sensing input for channel 4. Connect through a 1kΩ series resistor to the touch pad."
      },
      {
        "number": "8",
        "name": "OUT4",
        "type": "output",
        "description": "Channel 4 key output (通道4输出口). Output polarity/mode set by MD pin: direct active-high (MD=VDD), toggle/latched (MD=GND), or active-low open-drain requiring external pull-up (MD=floating). Sink current 30-40mA at VDD=5V."
      },
      {
        "number": "9",
        "name": "OUT3",
        "type": "output",
        "description": "Channel 3 key output. Behavior determined by MD pin (direct / toggle / open-drain)."
      },
      {
        "number": "10",
        "name": "OUT2",
        "type": "output",
        "description": "Channel 2 key output. Behavior determined by MD pin (direct / toggle / open-drain)."
      },
      {
        "number": "11",
        "name": "OUT1",
        "type": "output",
        "description": "Channel 1 key output. Behavior determined by MD pin (direct / toggle / open-drain)."
      },
      {
        "number": "12",
        "name": "SLEEP",
        "type": "input",
        "description": "Sleep mode select (睡眠模式选择). Tie to VDD to enable auto-sleep after ~80s of inactivity (reduced current, wakes on touch). Tie to GND to keep chip always active."
      },
      {
        "number": "13",
        "name": "MD",
        "type": "input",
        "description": "Output mode select (输出模式选择). MD=VDD → direct active-high push-pull output. MD=GND → toggle/self-lock output, initial low. MD=floating → active-low open-drain output requiring external pull-up."
      },
      {
        "number": "14",
        "name": "VDD",
        "type": "power_in",
        "description": "Positive supply (正电源). Operating range 2.5-5.5V; absolute max 6.0V. Typical operating current 0.8mA at 3V / 1.6mA at 5V; sleep current 45µA at 3V / 90µA at 5V. Decouple with 100nF near the pin; a ~20Ω series resistor from the rail is recommended in the typical application."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2210171730_Sam-wing-AI04_C5199869.pdf",
        "pages": 9,
        "sha256": "0a6e891daf512f33",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 14,
        "described": 14,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "ai04.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          8.7,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "3b9a775da256c8afcc28dcddfbc2eb3f266107fe61ce8446d96f2c52b6f44a70",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ai04-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          8.7,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "3223097302df8ed50aeb8bb2c2d8a24ad0b441f35638385124b004d810db0f0b",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Sam wing",
      "Package": "SOP-14",
      "Category": "Sensor",
      "Pins": "14"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "ai04"
  ],
  "discovery_pitch": "AI04 (Sam wing) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "ai04.kicad_sym",
    "ai04.kicad_mod",
    "ai04.glb",
    "ai04.step",
    "ai04.lbr",
    "docs/hero.png",
    "docs/ai04-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "ai04-etched.step"
  ],
  "visibility": {
    "public": true
  },
  "updated_at": "2026-09-24T16:09:58.421Z"
}