CH559T

{
  "schema_version": 1,
  "type": "component",
  "slug": "ch559t",
  "title": "CH559T",
  "brief": "WCH(Jiangsu Qin Heng) Microcontroller Units (MCUs/MPUs/SOCs), SSOP-20-208mil. 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",
    "ch559t",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "CH559T",
    "manufacturer": "WCH(Jiangsu Qin Heng)",
    "package": "SSOP-20-208mil",
    "pin_count": 20,
    "category": "Embedded Processors & Controllers",
    "subcategory": "Microcontroller Units (MCUs/MPUs/SOCs)",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/c41a4fde9a2fbe6af689fa0ceae309cc.pdf",
    "parts": {
      "symbol": "ch559t.kicad_sym",
      "footprint": "ch559t.kicad_mod",
      "model_3d": "ch559t-hero.glb",
      "model_3d_plain": "ch559t-etched.glb",
      "model_3d_step": "ch559t-etched.step",
      "model_3d_step_plain": "ch559t.step",
      "lbr": "ch559t.lbr"
    },
    "distributor_links": {
      "lcsc": "C85215"
    },
    "distributor_check": {
      "checked_at": "2026-10-24T00:07:31Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "P1.2/AIN2/PWM3/CAP3",
        "type": "bidirectional",
        "description": "P1.2 GPIO with ADC analog input AIN2 and Timer3 PWM3 output/CAP3 capture input (selectable to P4.2 by bTMR3_PIN_X)."
      },
      {
        "number": "2",
        "name": "P1.4/AIN4/SCS",
        "type": "bidirectional",
        "description": "P1.4 GPIO with ADC analog input AIN4 and SPI0 chip-select input SCS."
      },
      {
        "number": "3",
        "name": "P1.5/AIN5/MOSI",
        "type": "bidirectional",
        "description": "P1.5 GPIO with ADC analog input AIN5 and SPI0 MOSI (master output/slave input)."
      },
      {
        "number": "4",
        "name": "P1.6/AIN6/MISO",
        "type": "bidirectional",
        "description": "P1.6 GPIO with ADC analog input AIN6 and SPI0 MISO (master input/slave output)."
      },
      {
        "number": "5",
        "name": "P1.7/AIN7/SCK",
        "type": "bidirectional",
        "description": "P1.7 GPIO with ADC analog input AIN7 and SPI0 serial clock SCK."
      },
      {
        "number": "6",
        "name": "P5.7/RST",
        "type": "input",
        "description": "P5.7 state input pin that serves as the configurable external reset input RST."
      },
      {
        "number": "7",
        "name": "P3.2/LED0/INT0",
        "type": "bidirectional",
        "description": "P3.2 GPIO with LED data0 output and external interrupt 0 input INT0."
      },
      {
        "number": "8",
        "name": "P3.4/LEDC/T0",
        "type": "bidirectional",
        "description": "P3.4 GPIO with LED clock output LEDC and Timer0 external input T0."
      },
      {
        "number": "9",
        "name": "P4.6/XI/SCS_",
        "type": "bidirectional",
        "description": "P4.6 GPIO with crystal oscillator input XI and mapped SPI0 chip select SCS_."
      },
      {
        "number": "10",
        "name": "P4.7/XO/SCK_",
        "type": "bidirectional",
        "description": "P4.7 GPIO with crystal oscillator output XO and mapped SPI0 clock SCK_."
      },
      {
        "number": "11",
        "name": "P2.5/TNOW/PWM2/T2EX_/CAP2_",
        "type": "bidirectional",
        "description": "P2.5 GPIO with UART1 transmit indicator TNOW, PWM2 output and mapped T2EX_/CAP2_ inputs."
      },
      {
        "number": "12",
        "name": "P2.6/RXD1",
        "type": "bidirectional",
        "description": "P2.6 GPIO with UART1 serial data input RXD1."
      },
      {
        "number": "13",
        "name": "P2.7/TXD1",
        "type": "bidirectional",
        "description": "P2.7 GPIO with UART1 serial data output TXD1."
      },
      {
        "number": "14",
        "name": "P5.1/DP",
        "type": "bidirectional",
        "description": "P5.1 pin used as USB D+ (DP) signal with controllable internal pull-down resistor."
      },
      {
        "number": "15",
        "name": "P5.0/DM",
        "type": "bidirectional",
        "description": "P5.0 pin used as USB D- (DM) signal with controllable internal pull-down resistor."
      },
      {
        "number": "16",
        "name": "P0.3/TXD_",
        "type": "bidirectional",
        "description": "P0.3 open-drain bidirectional port pin (optional internal pull-up) with mapped UART0 TXD_."
      },
      {
        "number": "17",
        "name": "P0.2/RXD_",
        "type": "bidirectional",
        "description": "P0.2 open-drain bidirectional port pin (optional internal pull-up) with mapped UART0 RXD_."
      },
      {
        "number": "18",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "19",
        "name": "VIN5",
        "type": "power_in",
        "description": "5V external power input of the internal 5V->3.3V LDO; requires an external 0.1uF decoupling capacitor, and is connected to the supply when it is below 3.6V."
      },
      {
        "number": "20",
        "name": "VDD33",
        "type": "power_in",
        "description": "Internal voltage regulator output and 3.3V working power input; an external 3.3uF decoupling capacitor is required when supply is greater than 3.6V."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-sonnet-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Datasheet describes package as SSOP-20 5.30mm / 209mil, while the hint says 208mil; pinout is the sa; P5.x pin descriptions (RST, DP, DM) are on pages not provided; types and descriptions are inferred f"
        ],
        "pages_sent": 20,
        "cost_usd": 0.2169,
        "at": "2026-10-24T00:07:01"
      },
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        "pages": 93,
        "sha256": "f3f1d22954ee4bb3",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 20,
        "described": 20,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
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        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          7.8,
          7.2,
          2.1
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "c9a01a276d0b4d9561efd58f2fcee56f52c1b6ab464ea7a0380cab4e87a924e6",
        "checked": "2026-10-24",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ch559t-etched.step",
        "role": "eda",
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "ae19bec3e9f1a9a0272999513556773d3e21b21262c2cf56c29e4ef6582bb69b",
        "checked": "2026-10-24",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "WCH(Jiangsu Qin Heng)",
      "Package": "SSOP-20-208mil",
      "Category": "Embedded Processors & Controllers",
      "Pins": "20"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "f3f1d22954ee4bb3abf5be97c709bfcc907adc88c5ff04a70a47f427517a10b3",
      "rows": [
        {
          "name": "Operating temperature",
          "symbol": "TA",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "",
          "source_page": 91,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature",
          "symbol": "TS",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -55,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 91,
          "source": "datasheet"
        },
        {
          "name": "Internal operating supply voltage",
          "symbol": "VDD33",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.4,
          "typ": null,
          "max": 3.6,
          "conditions": "VCC33 connected to power, GND connected to ground",
          "source_page": 91,
          "source": "datasheet"
        },
        {
          "name": "External input supply voltage",
          "symbol": "VIN5",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.4,
          "typ": null,
          "max": 5.6,
          "conditions": "VIN5 connected to power, GND connected to ground",
          "source_page": 91,
          "source": "datasheet"
        },
        {
          "name": "Voltage on I/O pins supporting 5V",
          "symbol": "VIO5",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.4,
          "typ": null,
          "max": 5.5,
          "conditions": "",
          "source_page": 91,
          "source": "datasheet"
        },
        {
          "name": "Internal power voltage",
          "symbol": "VDD33",
          "kind": "electrical",
          "unit": "V",
          "min": 2.85,
          "typ": 3.3,
          "max": 3.6,
          "conditions": "",
          "source_page": 92,
          "source": "datasheet"
        },
        {
          "name": "External input supply voltage (external capacitor on VDD33)",
          "symbol": "VIN5",
          "kind": "electrical",
          "unit": "V",
          "min": 3.6,
          "typ": 5,
          "max": 5.5,
          "conditions": "External capacitor connected to VDD33 pin",
          "source_page": 92,
          "source": "datasheet"
        },
        {
          "name": "External input supply voltage (VDD33 shorted to VIN5)",
          "symbol": "VIN5",
          "kind": "electrical",
          "unit": "V",
          "min": 2.85,
          "typ": 3.3,
          "max": 3.6,
          "conditions": "VDD33 pin shorted to VIN5 pin",
          "source_page": 92,
          "source": "datasheet"
        },
        {
          "name": "Total operating current",
          "symbol": "ICC",
          "kind": "electrical",
          "unit": "mA",
          "min": 4,
          "typ": 8,
          "max": 50,
          "conditions": "",
          "source_page": 92,
          "source": "datasheet"
        },
        {
          "name": "Total sleep current",
          "symbol": "ISLP",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 0.1,
          "max": 0.2,
          "conditions": "",
          "source_page": 92,
          "source": "datasheet"
        },
        {
          "name": "Input low voltage",
          "symbol": "VIL",
          "kind": "electrical",
          "unit": "V",
          "min": -0.4,
          "typ": null,
          "max": 0.8,
          "conditions": "",
          "source_page": 92,
          "source": "datasheet"
        },
        {
          "name": "Output low voltage",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.4,
          "conditions": "IIL = 4mA",
          "source_page": 92,
          "source": "datasheet"
        },
        {
          "name": "Input current without pull-up resistor",
          "symbol": "IIN",
          "kind": "electrical",
          "unit": "uA",
          "min": -5,
          "typ": 0,
          "max": 5,
          "conditions": "",
          "source_page": 92,
          "source": "datasheet"
        },
        {
          "name": "Input current with pull-up resistor",
          "symbol": "IUP",
          "kind": "electrical",
          "unit": "uA",
          "min": 20,
          "typ": 40,
          "max": 80,
          "conditions": "",
          "source_page": 92,
          "source": "datasheet"
        },
        {
          "name": "Input current with pull-down resistor",
          "symbol": "IDN",
          "kind": "electrical",
          "unit": "uA",
          "min": -20,
          "typ": -40,
          "max": -80,
          "conditions": "",
          "source_page": 92,
          "source": "datasheet"
        },
        {
          "name": "Input current with pull-up resistor from low to high",
          "symbol": "IUPX",
          "kind": "electrical",
          "unit": "uA",
          "min": 200,
          "typ": 300,
          "max": 500,
          "conditions": "",
          "source_page": 92,
          "source": "datasheet"
        },
        {
          "name": "Power on reset threshold",
          "symbol": "Vpot",
          "kind": "electrical",
          "unit": "V",
          "min": 2.4,
          "typ": 2.55,
          "max": 2.7,
          "conditions": "",
          "source_page": 92,
          "source": "datasheet"
        },
        {
          "name": "External clock input frequency",
          "symbol": "Fxt",
          "kind": "timing",
          "unit": "MHz",
          "min": 4,
          "typ": 12,
          "max": 20,
          "conditions": "",
          "source_page": 92,
          "source": "datasheet"
        },
        {
          "name": "Internal clock frequency",
          "symbol": "Fosc",
          "kind": "timing",
          "unit": "MHz",
          "min": 11.82,
          "typ": 12,
          "max": 12.18,
          "conditions": "",
          "source_page": 92,
          "source": "datasheet"
        },
        {
          "name": "Frequency after PLL",
          "symbol": "Fpll",
          "kind": "timing",
          "unit": "MHz",
          "min": 24,
          "typ": 288,
          "max": 350,
          "conditions": "",
          "source_page": 92,
          "source": "datasheet"
        },
        {
          "name": "USB sampling clock frequency, USB host",
          "symbol": "Fusb4x",
          "kind": "timing",
          "unit": "MHz",
          "min": 47.98,
          "typ": 48,
          "max": 48.02,
          "conditions": "",
          "source_page": 92,
          "source": "datasheet"
        },
        {
          "name": "USB sampling clock frequency, USB device",
          "symbol": "Fusb4x",
          "kind": "timing",
          "unit": "MHz",
          "min": 47.04,
          "typ": 48,
          "max": 48.96,
          "conditions": "",
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          "source": "datasheet"
        },
        {
          "name": "System frequency (VDD33>=3V)",
          "symbol": "Fsys",
          "kind": "timing",
          "unit": "MHz",
          "min": 1,
          "typ": 12,
          "max": 56,
          "conditions": "VDD33>=3V",
          "source_page": 92,
          "source": "datasheet"
        },
        {
          "name": "System frequency (VDD33<3V)",
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          "kind": "timing",
          "unit": "MHz",
          "min": 1,
          "typ": 12,
          "max": 50,
          "conditions": "VDD33<3V",
          "source_page": 92,
          "source": "datasheet"
        },
        {
          "name": "Power on reset delay",
          "symbol": "Tpor",
          "kind": "timing",
          "unit": "mS",
          "min": 15,
          "typ": 17,
          "max": 20,
          "conditions": "",
          "source_page": 92,
          "source": "datasheet"
        },
        {
          "name": "External input valid reset signal width",
          "symbol": "Trst",
          "kind": "timing",
          "unit": "nS",
          "min": 70,
          "typ": 100,
          "max": 200,
          "conditions": "",
          "source_page": 92,
          "source": "datasheet"
        },
        {
          "name": "Thermal reset delay",
          "symbol": "Trdl",
          "kind": "timing",
          "unit": "uS",
          "min": 35,
          "typ": 60,
          "max": 100,
          "conditions": "",
          "source_page": 92,
          "source": "datasheet"
        },
        {
          "name": "Automatic hang up time in USB host mode",
          "symbol": "Tusp",
          "kind": "timing",
          "unit": "mS",
          "min": 2,
          "typ": 3,
          "max": 4,
          "conditions": "",
          "source_page": 92,
          "source": "datasheet"
        },
        {
          "name": "Automatic hang up time in USB device mode",
          "symbol": "Tusp",
          "kind": "timing",
          "unit": "mS",
          "min": 4,
          "typ": 5,
          "max": 6,
          "conditions": "",
          "source_page": 92,
          "source": "datasheet"
        },
        {
          "name": "Time to wake up from sleep mode",
          "symbol": "Twak",
          "kind": "timing",
          "unit": "uS",
          "min": 1,
          "typ": 40,
          "max": 100,
          "conditions": "",
          "source_page": 92,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
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  "discovery_triggers": [
    "ch559t"
  ],
  "discovery_pitch": "CH559T (WCH(Jiangsu Qin Heng)) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
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  "visibility": {
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}