CH32V303RCT6

{
  "schema_version": 1,
  "type": "component",
  "slug": "ch32v303rct6",
  "title": "CH32V303RCT6",
  "brief": "WCH Others, LQFP-64(10x10). 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",
    "ch32v303rct6",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "CH32V303RCT6",
    "manufacturer": "WCH",
    "package": "LQFP-64(10x10)",
    "pin_count": 64,
    "category": "Others",
    "subcategory": "Others",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8757221820183928832",
    "parts": {
      "symbol": "ch32v303rct6.kicad_sym",
      "footprint": "ch32v303rct6.kicad_mod",
      "model_3d": "ch32v303rct6-hero.glb",
      "model_3d_plain": "ch32v303rct6-etched.glb",
      "model_3d_step": "ch32v303rct6-etched.step",
      "model_3d_step_plain": "ch32v303rct6.step",
      "lbr": "ch32v303rct6.lbr"
    },
    "distributor_links": {
      "lcsc": "C5456849"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T09:25:53Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VBAT",
        "type": "power_in",
        "description": "Backup-domain supply input (1.8 V to 3.6 V) that powers the RTC, external LSE and backup registers when VDD is off; it must not exceed VDD."
      },
      {
        "number": "2",
        "name": "PC13/TAMPER-RTC",
        "type": "bidirectional",
        "description": "General-purpose I/O with TAMPER-RTC function; when powered from VDD it is limited to 2 MHz GPIO output with 30 pF maximum load and cannot drive LEDs, and when powered from VBAT it can only be used as TAMPER, RTC alarm or second output."
      },
      {
        "number": "3",
        "name": "PC14/OSC32_IN",
        "type": "bidirectional",
        "description": "Backup-domain I/O used as LSE oscillator input (OSC32_IN); from VDD it is limited to 2 MHz GPIO output with 30 pF load, and from VBAT it can only be used for LSE."
      },
      {
        "number": "4",
        "name": "PC15/OSC32_OUT",
        "type": "bidirectional",
        "description": "Backup-domain I/O used as LSE oscillator output (OSC32_OUT); from VDD it is limited to 2 MHz GPIO output with 30 pF load, and from VBAT it can only be used for LSE."
      },
      {
        "number": "5",
        "name": "OSC_IN/PD0",
        "type": "input",
        "description": "HSE crystal/external clock input (3 to 25 MHz); this pin defaults to OSC_IN after reset on the LQFP64M package and can be reassigned to PD0 by software."
      },
      {
        "number": "6",
        "name": "OSC_OUT/PD1",
        "type": "output",
        "description": "HSE crystal oscillator output; this pin defaults to OSC_OUT after reset on the LQFP64M package and can be reassigned to PD1 by software."
      },
      {
        "number": "7",
        "name": "NRST",
        "type": "input",
        "description": "Active-low external reset input with internal pull-up of about 30 to 50 kOhm and 100 ns minimum filtered pulse width."
      },
      {
        "number": "8",
        "name": "PC0",
        "type": "bidirectional",
        "description": "Analog-capable I/O with ADC_IN10 input; alternate functions include TIM9_CH1N, UART6_TX and ETH_RGMII_RXC."
      },
      {
        "number": "9",
        "name": "PC1",
        "type": "bidirectional",
        "description": "Analog-capable I/O with ADC_IN11 input; alternate functions include TIM9_CH2N, UART6_RX, ETH_MII_MDC and ETH_RMII_MDC."
      },
      {
        "number": "10",
        "name": "PC2",
        "type": "bidirectional",
        "description": "Analog-capable I/O with ADC_IN12 input; alternate functions include TIM9_CH3N, UART7_TX and OPA3_CH1N."
      },
      {
        "number": "11",
        "name": "PC3",
        "type": "bidirectional",
        "description": "Analog-capable I/O with ADC_IN13 input; alternate functions include TIM10_CH3, UART7_RX and OPA4_CH1N."
      },
      {
        "number": "12",
        "name": "VSSA",
        "type": "power_in",
        "description": "Analog ground for the ADC, temperature sensor, DAC, OPA, high-frequency RC oscillator and PLL analog parts."
      },
      {
        "number": "13",
        "name": "VDDA",
        "type": "power_in",
        "description": "Analog supply (2.4 V to 3.6 V) for the ADC, DAC, OPA, RC oscillator and PLL; it must be the same voltage as VIO, and must be at least 2.4 V when the ADC is used."
      },
      {
        "number": "14",
        "name": "PA0-WKUP",
        "type": "bidirectional",
        "description": "I/O with ADC_IN0 input and WKUP wake-up function (rising edge wakes the device from standby); alternates include USART2_CTS, TIM2_CH1/TIM2_ETR, TIM5_CH1, TIM8_ETR and OPA4_OUT0."
      },
      {
        "number": "15",
        "name": "PA1",
        "type": "bidirectional",
        "description": "I/O with ADC_IN1 input; alternate functions include USART2_RTS, TIM5_CH2, TIM2_CH2 and OPA3_OUT0."
      },
      {
        "number": "16",
        "name": "PA2",
        "type": "bidirectional",
        "description": "I/O with ADC_IN2 input; alternate functions include USART2_TX, TIM5_CH3, TIM2_CH3, TIM9_CH1 and OPA2_OUT0."
      },
      {
        "number": "17",
        "name": "PA3",
        "type": "bidirectional",
        "description": "I/O with ADC_IN3 input; alternate functions include USART2_RX, TIM5_CH4, TIM2_CH4, TIM9_CH2 and OPA1_OUT0."
      },
      {
        "number": "18",
        "name": "VSS_4",
        "type": "power_in",
        "description": "Digital ground pin; differences between ground pins must not exceed 50 mV."
      },
      {
        "number": "19",
        "name": "VDD_4",
        "type": "power_in",
        "description": "Main digital supply (2.4 V to 3.6 V) for part of the I/O pins and the internal regulator; differences between supply pins must not exceed 50 mV."
      },
      {
        "number": "20",
        "name": "PA4",
        "type": "bidirectional",
        "description": "I/O with ADC_IN4 and DAC1_OUT analog functions; alternate functions include SPI1_NSS, USART2_CK, TIM9_CH3 and DVP_HSYNC."
      },
      {
        "number": "21",
        "name": "PA5",
        "type": "bidirectional",
        "description": "I/O with ADC_IN5 and DAC2_OUT analog functions; alternate functions include SPI1_SCK, OPA2_CH1N, DVP_VSYNC and USART1_CTS_2."
      },
      {
        "number": "22",
        "name": "PA6",
        "type": "bidirectional",
        "description": "I/O with ADC_IN6 input; alternate functions include SPI1_MISO, TIM8_BKIN, TIM3_CH1, OPA1_CH1N and DVP_PCLK."
      },
      {
        "number": "23",
        "name": "PA7",
        "type": "bidirectional",
        "description": "I/O with ADC_IN7 input; alternate functions include SPI1_MOSI, TIM8_CH1N, TIM3_CH2, OPA2_CH1P and TIM1_CH1N_1."
      },
      {
        "number": "24",
        "name": "PC4",
        "type": "bidirectional",
        "description": "I/O with ADC_IN14 input; alternate functions include TIM9_CH4, UART8_TX, OPA4_CH1P and USART1_CTS_3."
      },
      {
        "number": "25",
        "name": "PC5",
        "type": "bidirectional",
        "description": "I/O with ADC_IN15 input; alternate functions include TIM9_BKIN, UART8_RX, OPA3_CH1P and USART1_RTS_3."
      },
      {
        "number": "26",
        "name": "PB0",
        "type": "bidirectional",
        "description": "I/O with ADC_IN8 input; alternate functions include TIM3_CH3, TIM8_CH2N, OPA1_CH1P, TIM1_CH2N_1 and UART4_TX_1."
      },
      {
        "number": "27",
        "name": "PB1",
        "type": "bidirectional",
        "description": "I/O with ADC_IN9 input; alternate functions include TIM3_CH4, TIM8_CH3N, OPA4_CH0N, TIM1_CH3N_1 and UART4_RX_1."
      },
      {
        "number": "28",
        "name": "PB2/BOOT1",
        "type": "bidirectional",
        "description": "I/O that also serves as BOOT1 boot-mode select; for low-power states the datasheet recommends configuring it as input with pull-down to avoid extra current."
      },
      {
        "number": "29",
        "name": "PB10",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions include I2C2_SCL, USART3_TX, OPA2_CH0N, TIM2_CH3_2 and TIM10_BKIN_1."
      },
      {
        "number": "30",
        "name": "PB11",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions include I2C2_SDA, USART3_RX, OPA1_CH0N, TIM2_CH4_2 and TIM10_ETR_1."
      },
      {
        "number": "31",
        "name": "VSS_1",
        "type": "power_in",
        "description": "Digital ground pin; differences between ground pins must not exceed 50 mV."
      },
      {
        "number": "32",
        "name": "VIO_1",
        "type": "power_in",
        "description": "I/O supply (2.4 V to 3.6 V) that sets the high output level of most I/O pins; it must not be higher than VDD in normal operation."
      },
      {
        "number": "33",
        "name": "PB12",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions include SPI2_NSS, I2S2_WS, I2C2_SMBA, USART3_CK, TIM1_BKIN, OPA4_CH0P and CAN2_RX."
      },
      {
        "number": "34",
        "name": "PB13",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions include SPI2_SCK, I2S2_CK, USART3_CTS, TIM1_CH1N, OPA3_CH0P and CAN2_TX."
      },
      {
        "number": "35",
        "name": "PB14",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions include SPI2_MISO, TIM1_CH2N, USART3_RTS, OPA2_CH0P and SDIO_D0 (SDIO_D0 default mapping changes per note 7 under certain batch and ETH/SDIO conditions)."
      },
      {
        "number": "36",
        "name": "PB15",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions include SPI2_MOSI, I2S2_SD, TIM1_CH3N, OPA1_CH0P, SDIO_D1 and USART1_TX_2."
      },
      {
        "number": "37",
        "name": "PC6",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions include I2S2_MCK, TIM8_CH1, SDIO_D6, ETH_RXP and TIM3_CH1_3."
      },
      {
        "number": "38",
        "name": "PC7",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions include I2S3_MCK, TIM8_CH2, SDIO_D7, ETH_RXN and TIM3_CH2_3."
      },
      {
        "number": "39",
        "name": "PC8",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions include TIM8_CH3, SDIO_D0, ETH_TXP, DVP_D2 and TIM3_CH3_3."
      },
      {
        "number": "40",
        "name": "PC9",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions include TIM8_CH4, SDIO_D1, ETH_TXN, DVP_D3 and TIM3_CH4_3."
      },
      {
        "number": "41",
        "name": "PA8",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions include USART1_CK, TIM1_CH1, MCO clock output, I2S3_MCK and USART1_RX_2."
      },
      {
        "number": "42",
        "name": "PA9",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions include USART1_TX, TIM1_CH2, OTG_FS_VBUS, I2S3_SD and DVP_D0."
      },
      {
        "number": "43",
        "name": "PA10",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions include USART1_RX, TIM1_CH3, OTG_FS_ID, DVP_D1 and USART1_CK_2."
      },
      {
        "number": "44",
        "name": "PA11",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT) and USB pin (OTG_FS_DM, ESD 3 kV HBM); alternate functions include USART1_CTS, CAN1_RX and TIM1_CH4."
      },
      {
        "number": "45",
        "name": "PA12",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT) and USB pin (OTG_FS_DP, ESD 3 kV HBM); alternate functions include USART1_RTS, CAN1_TX, TIM1_ETR and TIM10_CH1N."
      },
      {
        "number": "46",
        "name": "PA13/SWDIO",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT) whose default function after reset is the SWDIO serial-wire debug data line; alternate functions include TIM10_CH2N, TIM8_CH1N_1 and USART3_TX_2."
      },
      {
        "number": "47",
        "name": "VSS_2",
        "type": "power_in",
        "description": "Digital ground pin; differences between ground pins must not exceed 50 mV."
      },
      {
        "number": "48",
        "name": "VDD_2",
        "type": "power_in",
        "description": "Main digital supply (2.4 V to 3.6 V) for part of the I/O pins and the internal regulator; it must be within 50 mV of the other VDD pins."
      },
      {
        "number": "49",
        "name": "PA14/SWCLK",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT) whose default function after reset is the SWCLK serial-wire debug clock; alternate functions include TIM10_CH3N, TIM8_CH2N_1, UART8_TX_1 and USART3_RX_2."
      },
      {
        "number": "50",
        "name": "PA15",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions include SPI3_NSS, SPI3_MOSI, I2S3_WS, TIM2_CH1_1/TIM2_ETR_1, SPI1_NSS_1 and UART8_RX_1."
      },
      {
        "number": "51",
        "name": "PC10",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions include UART4_TX, SDIO_D2, TIM10_ETR, DVP_D8, USART3_TX_1 and SPI3_SCK_1."
      },
      {
        "number": "52",
        "name": "PC11",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions include UART4_RX, SDIO_D3, TIM10_CH4, DVP_D4, USART3_RX_1 and SPI3_MISO_1."
      },
      {
        "number": "53",
        "name": "PC12",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions include UART5_TX, SDIO_CK, TIM10_BKIN, DVP_D9, USART3_CK_1 and SPI3_MOSI_1."
      },
      {
        "number": "54",
        "name": "PD2",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions include TIM3_ETR, UART5_RX, SDIO_CMD and DVP_D11, and FSMC_NADV mapping follows note 9 under certain batch and USBHS/FSMC conditions."
      },
      {
        "number": "55",
        "name": "PB3",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions include SPI3_SCK, I2S3_CK, TIM2_CH2_1, SPI1_SCK_1 and TIM10_CH1_1, and DVP_D5 mapping follows note 8."
      },
      {
        "number": "56",
        "name": "PB4",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions include SPI3_MISO, TIM3_CH1_2, SPI1_MISO_1, UART5_TX_1 and TIM10_CH2_1."
      },
      {
        "number": "57",
        "name": "PB5",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT); alternate functions include I2C1_SMBA, SPI3_MOSI, I2S3_SD, TIM3_CH2_2, SPI1_MOSI_1, CAN2_RX_1 and UART5_RX_1."
      },
      {
        "number": "58",
        "name": "PB6",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT) and USB pin (USBHS_DM); alternate functions include I2C1_SCL, TIM4_CH1, USART1_TX_1, CAN2_TX_1 and TIM8_CH1_1, and DVP_D5 mapping follows note 8."
      },
      {
        "number": "59",
        "name": "PB7",
        "type": "bidirectional",
        "description": "5 V tolerant I/O (FT) and USB pin (USBHS_DP); alternate functions include I2C1_SDA, TIM4_CH2, USART1_RX_1 and TIM8_CH2_1, and FSMC_NADV mapping follows note 9."
      },
      {
        "number": "60",
        "name": "BOOT0",
        "type": "input",
        "description": "Boot-mode select input (BOOT0) sampled at startup; together with BOOT1 it selects boot from main flash, system memory or internal SRAM."
      },
      {
        "number": "61",
        "name": "PB8",
        "type": "bidirectional",
        "description": "I/O with 5 V tolerance (FT); alternate functions include TIM4_CH3, SDIO_D4, TIM10_CH1, DVP_D6, ETH_MII_TXD3, I2C1_SCL_1 and CAN1_RX_2."
      },
      {
        "number": "62",
        "name": "PB9",
        "type": "bidirectional",
        "description": "I/O with 5 V tolerance (FT); alternate functions include TIM4_CH4, SDIO_D5, TIM10_CH2, DVP_D7, I2C1_SDA_1, CAN1_TX_2 and UART6_RX_1."
      },
      {
        "number": "63",
        "name": "VSS_3",
        "type": "power_in",
        "description": "Digital ground pin; differences between ground pins must not exceed 50 mV."
      },
      {
        "number": "64",
        "name": "VIO_3",
        "type": "power_in",
        "description": "I/O supply (2.4 V to 3.6 V) that sets the high output level of the I/O pins it feeds; it must not be higher than VDD in normal operation."
      }
    ],
    "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: Package confirmed: the datasheet lists CH32V303RCT6 as LQFP64M (10x10 mm, 0.5 mm pitch) in the order; Batch-number-dependent remaps: notes 7, 8, 9, 10 and 11 say that for certain batch-number digits, SD; Backup-domain pins PC13, PC14 and PC15 (pins 2, 3, 4) have current and load limits (3 mA analog swit"
        ],
        "pages_sent": 66,
        "cost_usd": 0.3844,
        "at": "2026-10-18T09:24:21"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8757221820183928832",
        "pages": 84,
        "sha256": "e2cb4e6f003250be",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 64,
        "described": 64,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
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        "units": "mm",
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        "seat": "z = 0",
        "extents_mm": [
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        "checked": "2026-10-18",
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      {
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      }
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "WCH",
      "Package": "LQFP-64(10x10)",
      "Category": "Others",
      "Pins": "64"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "e2cb4e6f003250be41f579a2df2d33e1c35891e124eb3abbd8febdcdf879b501",
      "rows": [
        {
          "name": "Operating ambient temperature",
          "symbol": "TA",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "除 CH32V303RCT7 (applies to CH32V303RCT6)",
          "source_page": 48,
          "source": "datasheet"
        },
        {
          "name": "Storage ambient temperature",
          "symbol": "TS",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 48,
          "source": "datasheet"
        },
        {
          "name": "External main supply voltage (including VDDA and VDD)",
          "symbol": "VDD-VSS",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 4,
          "conditions": "",
          "source_page": 48,
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        },
        {
          "name": "IO supply voltage",
          "symbol": "VIO-VSS",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 4,
          "conditions": "",
          "source_page": 48,
          "source": "datasheet"
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