CH552G

{
  "schema_version": 1,
  "type": "component",
  "slug": "ch552g",
  "title": "CH552G",
  "brief": "WCH Jiangsu Qin Heng Microcontrollers (MCU/MPU/SOC), SOP-16. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "mcu",
    "ch552g"
  ],
  "component": {
    "mpn": "CH552G",
    "manufacturer": "WCH Jiangsu Qin Heng",
    "package": "SOP-16",
    "pin_count": 16,
    "category": "MCU",
    "subcategory": "Microcontrollers (MCU/MPU/SOC)",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/f30f383a4389a66627fc413559920cd0.pdf",
    "parts": {
      "symbol": "ch552g.kicad_sym",
      "footprint": "ch552g.kicad_mod",
      "model_3d": "ch552g-etched.glb",
      "model_3d_plain": "ch552g.glb",
      "model_3d_step": "ch552g-etched.step",
      "model_3d_step_plain": "ch552g.step",
      "lbr": "ch552g.lbr"
    },
    "distributor_links": {
      "lcsc": "C111292"
    },
    "pins": [
      {
        "number": "1",
        "name": "P3.2/TXD1_/INT0/VBUS1/AIN3",
        "type": "bidirectional",
        "description": "Port 3 bit 2 GPIO. Multiplexed with UART1 TXD1 mapping, external interrupt INT0, USB Type-C VBUS1 sense input, and ADC channel AIN3."
      },
      {
        "number": "2",
        "name": "P1.4/T2_/CAP1_/SCS/TIN2/UCC1/AIN1",
        "type": "bidirectional",
        "description": "Port 1 bit 4 GPIO. Alt functions: Timer2 clock T2 (mapped), Timer2 capture CAP1, SPI0 chip-select SCS, Touch-Key TIN2, USB Type-C CC1 detect UCC1, ADC channel AIN1."
      },
      {
        "number": "3",
        "name": "P1.5/MOSI/PWM1/TIN3/UCC2/AIN2",
        "type": "bidirectional",
        "description": "Port 1 bit 5 GPIO. Alt: SPI0 MOSI (master out / slave in), PWM1 output, Touch-Key TIN3, USB Type-C CC2 detect UCC2, ADC channel AIN2."
      },
      {
        "number": "4",
        "name": "P1.6/MISO/RXD1/TIN4",
        "type": "bidirectional",
        "description": "Port 1 bit 6 GPIO. Alt: SPI0 MISO, UART1 RXD1 receive input, Touch-Key channel TIN4."
      },
      {
        "number": "5",
        "name": "P1.7/SCK/TXD1/TIN5",
        "type": "bidirectional",
        "description": "Port 1 bit 7 GPIO. Alt: SPI0 SCK clock, UART1 TXD1 transmit output, Touch-Key channel TIN5."
      },
      {
        "number": "6",
        "name": "RST/T2EX_/CAP2_",
        "type": "input",
        "description": "External reset input (active high). Also selectable as Timer2 reload/capture input T2EX and capture CAP2 (mapped variants). Has internal pull-down resistor; other GPIOs default to pull-up."
      },
      {
        "number": "7",
        "name": "P3.1/PWM2_/TXD",
        "type": "bidirectional",
        "description": "Port 3 bit 1 GPIO. Alt: PWM2 output (mapped), UART0 TXD serial transmit."
      },
      {
        "number": "8",
        "name": "P3.0/PWM1_/RXD",
        "type": "bidirectional",
        "description": "Port 3 bit 0 GPIO. Alt: PWM1 output (mapped), UART0 RXD serial receive."
      },
      {
        "number": "9",
        "name": "P1.1/T2EX/CAP2/TIN1/VBUS2/AIN0",
        "type": "bidirectional",
        "description": "Port 1 bit 1 GPIO. Alt: Timer2 external reload T2EX, Timer2 capture CAP2, Touch-Key channel TIN1, USB Type-C VBUS2 sense, ADC channel AIN0."
      },
      {
        "number": "10",
        "name": "P3.3/INT1",
        "type": "bidirectional",
        "description": "Port 3 bit 3 GPIO. Alt: external interrupt INT1 input."
      },
      {
        "number": "11",
        "name": "P3.4/PWM2/RXD1_/T0",
        "type": "bidirectional",
        "description": "Port 3 bit 4 GPIO. Alt: PWM2 output, UART1 RXD1 (mapped alt), Timer0 external clock T0."
      },
      {
        "number": "12",
        "name": "P3.6/UDP",
        "type": "bidirectional",
        "description": "Port 3 bit 6 GPIO, dual-function USB D+ line (UDP). USB transceiver is USB 2.0 full-speed compliant; when used as USB no series termination resistor is required. As GPIO, uses V33 as its I/O rail so high level is limited to V33 (not 5 V tolerant)."
      },
      {
        "number": "13",
        "name": "P3.7/UDM",
        "type": "bidirectional",
        "description": "Port 3 bit 7 GPIO, dual-function USB D- line (UDM). USB 2.0 full-speed compliant transceiver; no external series termination required when used as USB. GPIO logic level tied to V33 rail (not 5 V tolerant)."
      },
      {
        "number": "14",
        "name": "GND",
        "type": "power_in",
        "description": "Common ground (VSS)."
      },
      {
        "number": "15",
        "name": "VCC",
        "type": "power_in",
        "description": "Main supply input (VDD), 3.3 V or 5 V. Requires an external 0.1 µF decoupling capacitor."
      },
      {
        "number": "16",
        "name": "V33",
        "type": "power_in",
        "description": "Internal USB 3.3 V LDO regulator output and USB I/O supply input. When VCC < 3.6 V, tie V33 to VCC externally. When VCC > 3.6 V (5 V operation), leave V33 as regulator output and connect an external 0.1 µF decoupling capacitor."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/f30f383a4389a66627fc413559920cd0.pdf",
        "pages": 53,
        "sha256": "b3995c47a6c00a9f",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 16,
        "described": 16,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "pin1": {
      "pad": "1",
      "at": [
        -2.475,
        -4.445
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "SOIC-16_3.9x9.9mm_P1.27mm@sha256:f9b5075740f7816c",
      "mark": "drawn"
    },
    "models_3d": [
      {
        "file": "ch552g.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          9.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "d5eeddb4c0b304dc61950919b126fc61d7586abd5f16ab71a2a79759ec6498bf",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ch552g-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          9.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "eb92fec922eca1e18566fad651548e885e1d2a0b3a1862039c1e10b23b6168c7",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "WCH Jiangsu Qin Heng",
      "Package": "SOP-16",
      "Category": "MCU",
      "Pins": "16"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "ch552g"
  ],
  "discovery_pitch": "CH552G (WCH Jiangsu Qin Heng) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "ch552g.kicad_sym",
    "ch552g.kicad_mod",
    "ch552g.glb",
    "ch552g.step",
    "ch552g-etched.step",
    "ch552g.lbr",
    "docs/hero.png",
    "docs/ch552g-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "CH552G",
      "kind": "packaging"
    },
    {
      "mpn": "CH552T",
      "kind": "unknown"
    },
    {
      "mpn": "CH552P",
      "kind": "unknown"
    },
    {
      "mpn": "CH552E",
      "kind": "unknown"
    }
  ],
  "updated_at": "2026-09-24T19:02:57.106Z"
}