STM32F103C4T6A

{
  "schema_version": 1,
  "type": "component",
  "slug": "stm32f103c4t6a",
  "title": "STM32F103C4T6A",
  "brief": "STMicroelectronics Microcontrollers (MCU/MPU/SOC), LQFP-48(7x7). Pinout checked against ST's open pin data, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "embedded processors & controllers",
    "stm32f103c4t6a",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "STM32F103C4T6A",
    "manufacturer": "STMicroelectronics",
    "package": "LQFP-48(7x7)",
    "pin_count": 48,
    "category": "Embedded Processors & Controllers",
    "subcategory": "Microcontrollers (MCU/MPU/SOC)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588923652314714112",
    "parts": {
      "symbol": "stm32f103c4t6a.kicad_sym",
      "footprint": "stm32f103c4t6a.kicad_mod",
      "model_3d": "stm32f103c4t6a-hero.glb",
      "model_3d_plain": "stm32f103c4t6a.glb",
      "model_3d_step": "stm32f103c4t6a-etched.step",
      "model_3d_step_plain": "stm32f103c4t6a.step",
      "lbr": "stm32f103c4t6a.lbr"
    },
    "distributor_links": {
      "lcsc": "C1337116",
      "digikey": "497-8316-ND",
      "mouser": "511-STM32F103C4T6A"
    },
    "distributor_check": {
      "checked_at": "2026-10-08T04:22:50Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "497-8316-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "511-STM32F103C4T6A",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VBAT",
        "type": "power_in",
        "description": "Backup-domain supply pin for the RTC and backup registers (VBAT supply, per the Features list)."
      },
      {
        "number": "2",
        "name": "PC13-TAMPER-RTC",
        "type": "bidirectional",
        "description": "GPIO PC13 with TAMPER-RTC function; supplied through the power switch, so it sinks at most 3 mA, output speed must not exceed 2 MHz with a 30 pF maximum load, and it must not be used as a current source such as an LED driver."
      },
      {
        "number": "3",
        "name": "PC14-OSC32_IN",
        "type": "bidirectional",
        "description": "GPIO PC14 with OSC32_IN function; power-switch supplied with the same limits as PC13 (3 mA sink, 2 MHz maximum output speed at 30 pF, not a current source)."
      },
      {
        "number": "4",
        "name": "PC15-OSC32_OUT",
        "type": "bidirectional",
        "description": "GPIO PC15 with OSC32_OUT function; power-switch supplied with the same limits as PC13 (3 mA sink, 2 MHz maximum output speed at 30 pF, not a current source)."
      },
      {
        "number": "5",
        "name": "OSC_IN",
        "type": "input",
        "description": "External oscillator input for the 4 to 16 MHz crystal; after reset this pin is OSC_IN and PD0 can be remapped onto it by software."
      },
      {
        "number": "6",
        "name": "OSC_OUT",
        "type": "output",
        "description": "External oscillator output for the 4 to 16 MHz crystal; after reset this pin is OSC_OUT and PD1 can be remapped onto it by software."
      },
      {
        "number": "7",
        "name": "NRST",
        "type": "bidirectional",
        "description": "Active reset pin of the microcontroller, with electrical limits given in the NRST pin characteristics section (5.3.14)."
      },
      {
        "number": "8",
        "name": "VSSA",
        "type": "power_in",
        "description": "Analog ground for the ADC and analog circuitry."
      },
      {
        "number": "9",
        "name": "VDDA",
        "type": "power_in",
        "description": "Analog supply for the ADC and analog blocks; the ADC conversion range is 0 to 3.6 V and the temperature sensor requires 2 V < VDDA < 3.6 V."
      },
      {
        "number": "10",
        "name": "PA0-WKUP",
        "type": "bidirectional",
        "description": "GPIO PA0 with WKUP, USART2_CTS, ADC12_IN0 and TIM2_CH1_ETR alternate functions; no 5 V tolerance marking in Table 5."
      },
      {
        "number": "11",
        "name": "PA1",
        "type": "bidirectional",
        "description": "GPIO PA1 with USART2_RTS, ADC12_IN1 and TIM2_CH2 alternate functions; no 5 V tolerance marking in Table 5."
      },
      {
        "number": "12",
        "name": "PA2",
        "type": "bidirectional",
        "description": "GPIO PA2 with USART2_TX, ADC12_IN2 and TIM2_CH3 alternate functions; no 5 V tolerance marking in Table 5."
      },
      {
        "number": "13",
        "name": "PA3",
        "type": "bidirectional",
        "description": "GPIO PA3 with USART2_RX, ADC12_IN3 and TIM2_CH4 alternate functions; no 5 V tolerance marking in Table 5."
      },
      {
        "number": "14",
        "name": "PA4",
        "type": "bidirectional",
        "description": "GPIO PA4 with SPI1_NSS, USART2_CK and ADC12_IN4 alternate functions; no 5 V tolerance marking in Table 5."
      },
      {
        "number": "15",
        "name": "PA5",
        "type": "bidirectional",
        "description": "GPIO PA5 with SPI1_SCK and ADC12_IN5 alternate functions; no 5 V tolerance marking in Table 5."
      },
      {
        "number": "16",
        "name": "PA6",
        "type": "bidirectional",
        "description": "GPIO PA6 with SPI1_MISO, ADC12_IN6 and TIM3_CH1 alternate functions (TIM1_BKIN remap); no 5 V tolerance marking in Table 5."
      },
      {
        "number": "17",
        "name": "PA7",
        "type": "bidirectional",
        "description": "GPIO PA7 with SPI1_MOSI, ADC12_IN7 and TIM3_CH2 alternate functions (TIM1_CH1N remap); no 5 V tolerance marking in Table 5."
      },
      {
        "number": "18",
        "name": "PB0",
        "type": "bidirectional",
        "description": "GPIO PB0 with ADC12_IN8 and TIM3_CH3 alternate functions (TIM1_CH2N remap); no 5 V tolerance marking in Table 5."
      },
      {
        "number": "19",
        "name": "PB1",
        "type": "bidirectional",
        "description": "GPIO PB1 with ADC12_IN9 and TIM3_CH4 alternate functions (TIM1_CH3N remap); no 5 V tolerance marking in Table 5."
      },
      {
        "number": "20",
        "name": "PB2/BOOT1",
        "type": "bidirectional",
        "description": "GPIO PB2 that also serves as the BOOT1 boot-mode pin; 5 V tolerant (FT) per Table 5."
      },
      {
        "number": "21",
        "name": "PB10",
        "type": "bidirectional",
        "description": "GPIO PB10 with TIM2_CH3 remap alternate function; 5 V tolerant (FT) per Table 5."
      },
      {
        "number": "22",
        "name": "PB11",
        "type": "bidirectional",
        "description": "GPIO PB11 with TIM2_CH4 remap alternate function; 5 V tolerant (FT) per Table 5."
      },
      {
        "number": "23",
        "name": "VSS_1",
        "type": "power_in",
        "description": "Digital ground pin 1 of the device."
      },
      {
        "number": "24",
        "name": "VDD_1",
        "type": "power_in",
        "description": "Digital supply pin 1; the application supply for I/Os and core is 2.0 to 3.6 V per the Features list."
      },
      {
        "number": "25",
        "name": "PB12",
        "type": "bidirectional",
        "description": "GPIO PB12 with TIM1_BKIN alternate function; 5 V tolerant (FT) per Table 5."
      },
      {
        "number": "26",
        "name": "PB13",
        "type": "bidirectional",
        "description": "GPIO PB13 with TIM1_CH1N alternate function; 5 V tolerant (FT) per Table 5."
      },
      {
        "number": "27",
        "name": "PB14",
        "type": "bidirectional",
        "description": "GPIO PB14 with TIM1_CH2N alternate function; 5 V tolerant (FT) per Table 5."
      },
      {
        "number": "28",
        "name": "PB15",
        "type": "bidirectional",
        "description": "GPIO PB15 with TIM1_CH3N alternate function; 5 V tolerant (FT) per Table 5."
      },
      {
        "number": "29",
        "name": "PA8",
        "type": "bidirectional",
        "description": "GPIO PA8 with USART1_CK, TIM1_CH1 and MCO alternate functions; 5 V tolerant (FT) per Table 5."
      },
      {
        "number": "30",
        "name": "PA9",
        "type": "bidirectional",
        "description": "GPIO PA9 with USART1_TX and TIM1_CH2 alternate functions; 5 V tolerant (FT) per Table 5."
      },
      {
        "number": "31",
        "name": "PA10",
        "type": "bidirectional",
        "description": "GPIO PA10 with USART1_RX and TIM1_CH3 alternate functions; 5 V tolerant (FT) per Table 5."
      },
      {
        "number": "32",
        "name": "PA11",
        "type": "bidirectional",
        "description": "GPIO PA11 with USART1_CTS, CAN_RX, TIM1_CH4 and USBDM alternate functions; 5 V tolerant (FT) per Table 5."
      },
      {
        "number": "33",
        "name": "PA12",
        "type": "bidirectional",
        "description": "GPIO PA12 with USART1_RTS, CAN_TX, TIM1_ETR and USBDP alternate functions; 5 V tolerant (FT) per Table 5."
      },
      {
        "number": "34",
        "name": "PA13",
        "type": "bidirectional",
        "description": "GPIO PA13 that is also the JTMS/SWDIO debug pin after reset; 5 V tolerant (FT) per Table 5."
      },
      {
        "number": "35",
        "name": "VSS_2",
        "type": "power_in",
        "description": "Digital ground pin 2 of the device."
      },
      {
        "number": "36",
        "name": "VDD_2",
        "type": "power_in",
        "description": "Digital supply pin 2; the application supply for I/Os and core is 2.0 to 3.6 V per the Features list."
      },
      {
        "number": "37",
        "name": "PA14",
        "type": "bidirectional",
        "description": "GPIO PA14 that is also the JTCK/SWCLK debug pin after reset; 5 V tolerant (FT) per Table 5."
      },
      {
        "number": "38",
        "name": "PA15",
        "type": "bidirectional",
        "description": "GPIO PA15 that is also the JTDI debug pin after reset, with TIM2_CH1_ETR and SPI1_NSS remap alternate functions; 5 V tolerant (FT) per Table 5."
      },
      {
        "number": "39",
        "name": "PB3",
        "type": "bidirectional",
        "description": "GPIO PB3 that is also the JTDO debug pin after reset, with TIM2_CH2 and TRACESWO remap alternate functions; 5 V tolerant (FT) per Table 5."
      },
      {
        "number": "40",
        "name": "PB4",
        "type": "bidirectional",
        "description": "GPIO PB4 that is also the NJTRST debug pin after reset, with TIM3_CH1 and SPI1_MISO remap alternate functions; 5 V tolerant (FT) per Table 5."
      },
      {
        "number": "41",
        "name": "PB5",
        "type": "bidirectional",
        "description": "GPIO PB5 with I2C1_SMBA alternate function and TIM3_CH2 and SPI1_MOSI remap options; no 5 V tolerance marking in Table 5."
      },
      {
        "number": "42",
        "name": "PB6",
        "type": "bidirectional",
        "description": "GPIO PB6 with I2C1_SCL and USART1_TX alternate functions; 5 V tolerant (FT) per Table 5."
      },
      {
        "number": "43",
        "name": "PB7",
        "type": "bidirectional",
        "description": "GPIO PB7 with I2C1_SDA and USART1_RX alternate functions; 5 V tolerant (FT) per Table 5."
      },
      {
        "number": "44",
        "name": "BOOT0",
        "type": "input",
        "description": "Boot-mode selection input BOOT0 (listed as an input without 5 V tolerance in Table 5)."
      },
      {
        "number": "45",
        "name": "PB8",
        "type": "bidirectional",
        "description": "GPIO PB8 with I2C1_SCL and CAN_RX remap alternate functions; 5 V tolerant (FT) per Table 5."
      },
      {
        "number": "46",
        "name": "PB9",
        "type": "bidirectional",
        "description": "GPIO PB9 with I2C1_SDA and CAN_TX remap alternate functions; 5 V tolerant (FT) per Table 5."
      },
      {
        "number": "47",
        "name": "VSS_3",
        "type": "power_in",
        "description": "Digital ground pin 3 of the device."
      },
      {
        "number": "48",
        "name": "VDD_3",
        "type": "power_in",
        "description": "Digital supply pin 3; the application supply for I/Os and core is 2.0 to 3.6 V per the Features list."
      }
    ],
    "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: The LQFP48 pinout figure (Figure 5) text is garbled in the extraction, so the pin-to-name mapping wa; The ordering code STM32F103C4T6A decodes to 48 pins (C), LQFP package (T), 16 KB Flash (4), so the L; The datasheet gives no per-pin voltage limits beyond the 5 V-tolerant (FT) markings, the PC13-PC15 p"
        ],
        "pages_sent": 47,
        "cost_usd": 0.2131,
        "at": "2026-10-08T04:22:27"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588923652314714112",
        "pages": 99,
        "sha256": "31ab1fe3de6e6cf3",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 48,
        "described": 48,
        "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": [
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          9,
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        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "9dea352d93177c2904afd7d7b68ea8855ce1ab691f69f8b3e13655600514b6bf",
        "checked": "2026-10-08",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "stm32f103c4t6a-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "21c70d3db0d05a3477f72d84cdd115cc1f4b75feac1f156787859307c05161d9",
        "checked": "2026-10-08",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "STMicroelectronics",
      "Package": "LQFP-48(7x7)",
      "Category": "Embedded Processors & Controllers",
      "Pins": "48"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "stm32f103c4t6a"
  ],
  "discovery_pitch": "STM32F103C4T6A (STMicroelectronics) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
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    "path": "docs/hero.png"
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