CH554G

{
  "schema_version": 1,
  "type": "component",
  "slug": "ch554g",
  "title": "CH554G",
  "brief": "WCH Jiangsu Qin Heng Microcontrollers (MCU/MPU/SOC), SOP-16. 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",
    "embedded processors & controllers",
    "ch554g",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "CH554G",
    "manufacturer": "WCH Jiangsu Qin Heng",
    "package": "SOP-16",
    "pin_count": 16,
    "category": "Embedded Processors & Controllers",
    "subcategory": "Microcontrollers (MCU/MPU/SOC)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588882226692173824",
    "parts": {
      "symbol": "ch554g.kicad_sym",
      "footprint": "ch554g.kicad_mod",
      "model_3d": "ch554g-hero.glb",
      "model_3d_plain": "ch554g-etched.glb",
      "model_3d_step": "ch554g-etched.step",
      "model_3d_step_plain": "ch554g.step",
      "lbr": "ch554g.lbr"
    },
    "distributor_links": {
      "lcsc": "C114295"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T23:27:08Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "P3.2",
        "type": "bidirectional",
        "description": "General-purpose I/O with alternate functions TXD1_ (UART1 transmit, remapped), INT0 external interrupt 0 input, VBUS1 USB Type-C bus-voltage detect input and AIN3 ADC/comparator input channel 3."
      },
      {
        "number": "2",
        "name": "P1.4",
        "type": "bidirectional",
        "description": "General-purpose I/O with alternate functions T2_/CAP1_ (Timer2 remapped), SCS SPI0 chip-select, TIN2 touch-key input, UCC1 USB Type-C configuration channel and AIN1 ADC input; an analog input pin must be set to high-impedance input or open-drain output high with pull-up disabled."
      },
      {
        "number": "3",
        "name": "P1.5",
        "type": "bidirectional",
        "description": "General-purpose I/O with alternate functions MOSI (SPI0), PWM1 output, TIN3 touch-key input, UCC2 USB Type-C configuration channel and AIN2 ADC input; analog use requires high-impedance or open-drain high input configuration."
      },
      {
        "number": "4",
        "name": "P1.6",
        "type": "bidirectional",
        "description": "General-purpose I/O with alternate functions MISO (SPI0), RXD1 (UART1 receive) and TIN4 touch-key input; it is also the programming MISO pin when ISP/in-board programming is used."
      },
      {
        "number": "5",
        "name": "P1.7",
        "type": "bidirectional",
        "description": "General-purpose I/O with alternate functions SCK (SPI0 clock), TXD1 (UART1 transmit) and TIN5 touch-key input; it is also the programming SCK pin when in-board programming is used."
      },
      {
        "number": "6",
        "name": "RST",
        "type": "input",
        "description": "External reset input with an internal pull-down resistor; it can serve as a manual reset input only when the En_RST_RESET configuration bit is enabled."
      },
      {
        "number": "7",
        "name": "P3.1",
        "type": "bidirectional",
        "description": "General-purpose I/O with alternate functions TXD (UART0 transmit, default) and PWM2_ (PWM2 output, remapped); the PWM2 function takes priority over TXD when both are enabled."
      },
      {
        "number": "8",
        "name": "P3.0",
        "type": "bidirectional",
        "description": "General-purpose I/O with alternate functions RXD (UART0 receive, default) and PWM1_ (PWM1 output, remapped)."
      },
      {
        "number": "9",
        "name": "P1.1",
        "type": "bidirectional",
        "description": "General-purpose I/O with alternate functions T2EX/CAP2 (Timer2 external reload/capture input), TIN1 touch-key input, VBUS2 USB Type-C bus-voltage detect input and AIN0 ADC input channel 0."
      },
      {
        "number": "10",
        "name": "P3.3",
        "type": "bidirectional",
        "description": "General-purpose I/O with alternate function INT1, the external interrupt 1 input."
      },
      {
        "number": "11",
        "name": "P3.4",
        "type": "bidirectional",
        "description": "General-purpose I/O with alternate functions PWM2 output, RXD1_ (UART1 receive, remapped) and T0 (Timer0 external input)."
      },
      {
        "number": "12",
        "name": "P3.6",
        "type": "bidirectional",
        "description": "General-purpose I/O and USB D+ signal UDP; P3.6 and P3.7 use V33 as I/O supply so their high level cannot exceed V33 (not 5 V tolerant), and no series resistor may be placed on the USB signal when used for USB."
      },
      {
        "number": "13",
        "name": "P3.7",
        "type": "bidirectional",
        "description": "General-purpose I/O and USB D- signal UDM; like P3.6 it uses V33 as I/O supply so its high level is limited to V33, and no series resistor may be placed on the USB signal when used for USB."
      },
      {
        "number": "14",
        "name": "GND",
        "type": "power_in",
        "description": "Common ground (VSS) for the device; the package bottom ground connection on the SOP16 is this pin."
      },
      {
        "number": "15",
        "name": "VCC",
        "type": "power_in",
        "description": "Power supply input (VDD) that requires an external 0.1 uF decoupling capacitor to GND."
      },
      {
        "number": "16",
        "name": "V33",
        "type": "power_out",
        "description": "Internal USB power regulator output and internal USB power input: connect the external supply here when the supply is below 3.6 V, or add an external 0.1 uF decoupling capacitor when the supply is above 3.6 V."
      }
    ],
    "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 numbering taken from the SOP16 column of the section 4 pin table (page 3), which the datasheet t; Four GPIOs in the full datasheet have no SOP16 pin and are omitted from the output: P1.0 (SOP16 '-'); Pin 16 V33 type is ambiguous: the datasheet describes it as both the regulator output and the USB po"
        ],
        "pages_sent": 51,
        "cost_usd": 0.3102,
        "at": "2026-10-18T23:24:38"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588882226692173824",
        "pages": 57,
        "sha256": "9b21d66e1b11018b",
        "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"
    },
    "models_3d": [
      {
        "file": "ch554g.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": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ch554g-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": "7355dab99f71fa0f436aa2b2025516243a2bdd16045088e5d85c42c83c08bbc7",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "WCH Jiangsu Qin Heng",
      "Package": "SOP-16",
      "Category": "Embedded Processors & Controllers",
      "Pins": "16"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "9b21d66e1b11018bef981b47ac5e5c711dec51eb91cd06a67d04533f6bd1d7e2",
      "rows": [
        {
          "name": "工作时的环境温度",
          "symbol": "TA",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "",
          "source_page": 53,
          "source": "datasheet"
        },
        {
          "name": "储存时的环境温度",
          "symbol": "TS",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -55,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 53,
          "source": "datasheet"
        },
        {
          "name": "电源电压(VCC 接电源，GND 接地)",
          "symbol": "VCC",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.4,
          "typ": null,
          "max": 5.8,
          "conditions": "VCC 接电源，GND 接地",
          "source_page": 53,
          "source": "datasheet"
        },
        {
          "name": "除 P3.6/P3.7 之外其它输入或者输出引脚上的电压",
          "symbol": "VIO",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.4,
          "typ": null,
          "max": null,
          "conditions": "max printed as VCC+0.4 V",
          "source_page": 53,
          "source": "datasheet"
        },
        {
          "name": "P3.6/P3.7 输入或者输出引脚上的电压",
          "symbol": "VIOU",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.4,
          "typ": null,
          "max": null,
          "conditions": "max printed as V33+0.4 V",
          "source_page": 53,
          "source": "datasheet"
        },
        {
          "name": "VCC 引脚电源电压 (V33 仅外接电容, 5V)",
          "symbol": "VCC5",
          "kind": "electrical",
          "unit": "V",
          "min": 3.7,
          "typ": 5,
          "max": 5.5,
          "conditions": "TA=25℃, VCC=5V, Fsys=6MHz; V33 仅外接电容",
          "source_page": 53,
          "source": "datasheet"
        },
        {
          "name": "内部 USB 电源调整器输出电压",
          "symbol": "V33",
          "kind": "electrical",
          "unit": "V",
          "min": 3.14,
          "typ": 3.27,
          "max": 3.4,
          "conditions": "TA=25℃, VCC=5V, Fsys=6MHz",
          "source_page": 53,
          "source": "datasheet"
        },
        {
          "name": "Fsys=24MHz 工作时的总电源电流",
          "symbol": "ICC24M5",
          "kind": "electrical",
          "unit": "mA",
          "min": 8,
          "typ": null,
          "max": 11,
          "conditions": "TA=25℃, VCC=5V, Fsys=6MHz",
          "source_page": 53,
          "source": "datasheet"
        },
        {
          "name": "Fsys=6MHz 工作时的总电源电流",
          "symbol": "ICC6M5",
          "kind": "electrical",
          "unit": "mA",
          "min": 4,
          "typ": null,
          "max": 6,
          "conditions": "TA=25℃, VCC=5V, Fsys=6MHz",
          "source_page": 53,
          "source": "datasheet"
        },
        {
          "name": "Fsys=750KHz 工作时的总电源电流",
          "symbol": "ICC750K5",
          "kind": "electrical",
          "unit": "mA",
          "min": 2,
          "typ": null,
          "max": 3,
          "conditions": "TA=25℃, VCC=5V, Fsys=6MHz",
          "source_page": 53,
          "source": "datasheet"
        },
        {
          "name": "睡眠后的总电源电流",
          "symbol": "ISLP5",
          "kind": "electrical",
          "unit": "mA",
          "min": 0.1,
          "typ": null,
          "max": 0.2,
          "conditions": "TA=25℃, VCC=5V, Fsys=6MHz",
          "source_page": 53,
          "source": "datasheet"
        },
        {
          "name": "完全睡眠后的总电源电流",
          "symbol": "ISLP5L",
          "kind": "electrical",
          "unit": "mA",
          "min": 0.008,
          "typ": null,
          "max": 0.025,
          "conditions": "VCC=V33=5V，且选用外部晶体时钟，且 bLDO3V3_OFF=1 关闭 LDO",
          "source_page": 53,
          "source": "datasheet"
        },
        {
          "name": "ADC 模数转换模块工作电流",
          "symbol": "IADC5",
          "kind": "electrical",
          "unit": "uA",
          "min": 200,
          "typ": null,
          "max": 800,
          "conditions": "TA=25℃, VCC=5V, Fsys=6MHz",
          "source_page": 53,
          "source": "datasheet"
        },
        {
          "name": "电压比较器模块工作电流",
          "symbol": "ICMP5",
          "kind": "electrical",
          "unit": "uA",
          "min": 100,
          "typ": null,
          "max": 500,
          "conditions": "TA=25℃, VCC=5V, Fsys=6MHz",
          "source_page": 53,
          "source": "datasheet"
        },
        {
          "name": "触摸按键电容检测模块工作电流",
          "symbol": "ITKEY5",
          "kind": "electrical",
          "unit": "uA",
          "min": 150,
          "typ": null,
          "max": 250,
          "conditions": "TA=25℃, VCC=5V, Fsys=6MHz",
          "source_page": 53,
          "source": "datasheet"
        },
        {
          "name": "低电平输入电压",
          "symbol": "VIL5",
          "kind": "electrical",
          "unit": "V",
          "min": -0.4,
          "typ": null,
          "max": 1.2,
          "conditions": "TA=25℃, VCC=5V, Fsys=6MHz",
          "source_page": 53,
          "source": "datasheet"
        },
        {
          "name": "高电平输入电压",
          "symbol": "VIH5",
          "kind": "electrical",
          "unit": "V",
          "min": 2.4,
          "typ": null,
          "max": null,
          "conditions": "TA=25℃, VCC=5V, Fsys=6MHz; max printed as VCC+0.4 V",
          "source_page": 53,
          "source": "datasheet"
        },
        {
          "name": "低电平输出电压",
          "symbol": "VOL5",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.4,
          "conditions": "12mA 吸入电流; TA=25℃, VCC=5V, Fsys=6MHz",
          "source_page": 53,
          "source": "datasheet"
        },
        {
          "name": "无上拉输入端的输入电流",
          "symbol": "IIN",
          "kind": "electrical",
          "unit": "uA",
          "min": -5,
          "typ": 0,
          "max": 5,
          "conditions": "TA=25℃, VCC=5V, Fsys=6MHz",
          "source_page": 53,
          "source": "datasheet"
        },
        {
          "name": "带下拉电阻输入端的输入电流",
          "symbol": "IDN5",
          "kind": "electrical",
          "unit": "uA",
          "min": -35,
          "typ": -70,
          "max": -140,
          "conditions": "TA=25℃, VCC=5V, Fsys=6MHz",
          "source_page": 53,
          "source": "datasheet"
        },
        {
          "name": "带上拉电阻输入端的输入电流",
          "symbol": "IUP5",
          "kind": "electrical",
          "unit": "uA",
          "min": 35,
          "typ": 70,
          "max": 140,
          "conditions": "TA=25℃, VCC=5V, Fsys=6MHz",
          "source_page": 53,
          "source": "datasheet"
        },
        {
          "name": "带上拉输入端由低向高翻转时的输入电流",
          "symbol": "IUP5X",
          "kind": "electrical",
          "unit": "uA",
          "min": 250,
          "typ": 400,
          "max": 600,
          "conditions": "TA=25℃, VCC=5V, Fsys=6MHz",
          "source_page": 53,
          "source": "datasheet"
        },
        {
          "name": "电源上电复位的门限电压 (5V)",
          "symbol": "Vpot",
          "kind": "electrical",
          "unit": "V",
          "min": 2.1,
          "typ": 2.3,
          "max": 2.5,
          "conditions": "TA=25℃, VCC=5V, Fsys=6MHz",
          "source_page": 53,
          "source": "datasheet"
        },
        {
          "name": "VCC 引脚电源电压 (V33 短接到 VCC，开启 USB)",
          "symbol": "VCC3",
          "kind": "electrical",
          "unit": "V",
          "min": 3,
          "typ": 3.3,
          "max": 3.6,
          "conditions": "V33 短接到 VCC，开启 USB; TA=25℃, VCC=V33=3.3V, Fsys=6MHz",
          "source_page": 53,
          "source": "datasheet"
        },
        {
          "name": "VCC 引脚电源电压 (V33 短接到 VCC，关闭 USB)",
          "symbol": "VCC3",
          "kind": "electrical",
          "unit": "V",
          "min": 2.7,
          "typ": 3.3,
          "max": 3.6,
          "conditions": "V33 短接到 VCC，关闭 USB; TA=25℃, VCC=V33=3.3V, Fsys=6MHz",
          "source_page": 53,
          "source": "datasheet"
        },
        {
          "name": "Fsys=16MHz 工作时的总电源电流",
          "symbol": "ICC16M3",
          "kind": "electrical",
          "unit": "mA",
          "min": 4,
          "typ": null,
          "max": 6,
          "conditions": "TA=25℃, VCC=V33=3.3V, Fsys=6MHz",
          "source_page": 53,
          "source": "datasheet"
        },
        {
          "name": "Fsys=6MHz 工作时的总电源电流",
          "symbol": "ICC6M3",
          "kind": "electrical",
          "unit": "mA",
          "min": 2,
          "typ": null,
          "max": 4,
          "conditions": "TA=25℃, VCC=V33=3.3V, Fsys=6MHz",
          "source_page": 53,
          "source": "datasheet"
        },
        {
          "name": "Fsys=750KHz 工作时的总电源电流",
          "symbol": "ICC750K3",
          "kind": "electrical",
          "unit": "mA",
          "min": 1,
          "typ": null,
          "max": 2,
          "conditions": "TA=25℃, VCC=V33=3.3V, Fsys=6MHz",
          "source_page": 53,
          "source": "datasheet"
        },
        {
          "name": "睡眠后的总电源电流",
          "symbol": "ISLP3",
          "kind": "electrical",
          "unit": "mA",
          "min": 0.07,
          "typ": null,
          "max": 0.15,
          "conditions": "TA=25℃, VCC=V33=3.3V, Fsys=6MHz",
          "source_page": 53,
          "source": "datasheet"
        },
        {
          "name": "完全睡眠后的总电源电流",
          "symbol": "ISLP3L",
          "kind": "electrical",
          "unit": "mA",
          "min": 0.004,
          "typ": null,
          "max": 0.015,
          "conditions": "bLDO3V3_OFF=1 关闭 LDO，完全睡眠后的总电源电流",
          "source_page": 54,
          "source": "datasheet"
        },
        {
          "name": "ADC 模数转换模块工作电流",
          "symbol": "IADC3",
          "kind": "electrical",
          "unit": "uA",
          "min": 150,
          "typ": null,
          "max": 500,
          "conditions": "TA=25℃, VCC=V33=3.3V, Fsys=6MHz",
          "source_page": 54,
          "source": "datasheet"
        },
        {
          "name": "电压比较器模块工作电流",
          "symbol": "ICMP3",
          "kind": "electrical",
          "unit": "uA",
          "min": 70,
          "typ": null,
          "max": 300,
          "conditions": "TA=25℃, VCC=V33=3.3V, Fsys=6MHz",
          "source_page": 54,
          "source": "datasheet"
        },
        {
          "name": "触摸按键电容检测模块工作电流",
          "symbol": "ITKEY3",
          "kind": "electrical",
          "unit": "uA",
          "min": 130,
          "typ": null,
          "max": 200,
          "conditions": "TA=25℃, VCC=V33=3.3V, Fsys=6MHz",
          "source_page": 54,
          "source": "datasheet"
        },
        {
          "name": "低电平输入电压",
          "symbol": "VIL3",
          "kind": "electrical",
          "unit": "V",
          "min": -0.4,
          "typ": null,
          "max": 0.8,
          "conditions": "TA=25℃, VCC=V33=3.3V, Fsys=6MHz",
          "source_page": 54,
          "source": "datasheet"
        },
        {
          "name": "高电平输入电压",
          "symbol": "VIH3",
          "kind": "electrical",
          "unit": "V",
          "min": 1.9,
          "typ": null,
          "max": null,
          "conditions": "TA=25℃, VCC=V33=3.3V, Fsys=6MHz; max printed as VCC+0.4 V",
          "source_page": 54,
          "source": "datasheet"
        },
        {
          "name": "低电平输出电压",
          "symbol": "VOL3",
          "kind": "electrical",
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