STM32F103RET6

{
  "schema_version": 1,
  "type": "component",
  "slug": "stm32f103ret6",
  "title": "STM32F103RET6",
  "brief": "STMicroelectronics Microcontrollers (MCU/MPU/SOC), LQFP-64(10x10). Pinout checked against ST's open pin data, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "mcu",
    "stm32f103ret6"
  ],
  "component": {
    "mpn": "STM32F103RET6",
    "manufacturer": "STMicroelectronics",
    "package": "LQFP-64(10x10)",
    "pin_count": 64,
    "category": "MCU",
    "subcategory": "Microcontrollers (MCU/MPU/SOC)",
    "datasheet": "https://www.st.com/resource/en/datasheet/stm32f103ret6.pdf",
    "parts": {
      "symbol": "stm32f103ret6.kicad_sym",
      "footprint": "stm32f103ret6.kicad_mod",
      "model_3d": "stm32f103ret6-etched.glb",
      "model_3d_plain": "stm32f103ret6.glb",
      "model_3d_step": "stm32f103ret6-etched.step",
      "model_3d_step_plain": "stm32f103ret6.step",
      "lbr": "stm32f103ret6.lbr"
    },
    "distributor_links": {
      "digikey": "497-6444-ND",
      "lcsc": "C8322"
    },
    "pins": [
      {
        "number": "1",
        "name": "VBAT",
        "type": "power_in",
        "description": "Backup domain supply (1.8-3.6 V). Powers RTC, LSE oscillator and backup registers when VDD is absent. Tie to VDD if not battery-backed."
      },
      {
        "number": "2",
        "name": "PC13-TAMPER-RTC",
        "type": "bidirectional",
        "description": "GPIO port C bit 13; alternate function TAMPER-RTC (RTC tamper detect / RTC alarm out). Supplied through the VBAT power switch, so use in output mode is limited to 2 MHz with ≤30 pF and cannot source significant current."
      },
      {
        "number": "3",
        "name": "PC14-OSC32_IN",
        "type": "bidirectional",
        "description": "GPIO PC14 or 32.768 kHz LSE crystal input. Backup-domain pin driven through the VBAT power switch; when used as GPIO output the same 2 MHz / 30 pF / low-drive limits apply."
      },
      {
        "number": "4",
        "name": "PC15-OSC32_OUT",
        "type": "bidirectional",
        "description": "GPIO PC15 or 32.768 kHz LSE crystal output. Backup-domain pin driven through the VBAT power switch; same low-drive restrictions as PC13/PC14."
      },
      {
        "number": "5",
        "name": "PD0/OSC_IN",
        "type": "bidirectional",
        "description": "After reset this pin is OSC_IN (HSE 4-16 MHz crystal input). Software may remap it as GPIO PD0. FSMC function of PD0 is not available in LQFP64."
      },
      {
        "number": "6",
        "name": "PD1/OSC_OUT",
        "type": "bidirectional",
        "description": "After reset this pin is OSC_OUT (HSE crystal output). Software may remap it as GPIO PD1. FSMC function is not available in LQFP64."
      },
      {
        "number": "7",
        "name": "NRST",
        "type": "bidirectional",
        "description": "Active-low bidirectional device reset input/open-drain output with internal pull-up. Drive low for ≥20 µs to reset the MCU."
      },
      {
        "number": "8",
        "name": "PC0",
        "type": "bidirectional",
        "description": "GPIO PC0. Alternate: ADC123_IN10 (analog input to ADC1/2/3 channel 10)."
      },
      {
        "number": "9",
        "name": "PC1",
        "type": "bidirectional",
        "description": "GPIO PC1. Alternate: ADC123_IN11."
      },
      {
        "number": "10",
        "name": "PC2",
        "type": "bidirectional",
        "description": "GPIO PC2. Alternate: ADC123_IN12."
      },
      {
        "number": "11",
        "name": "PC3",
        "type": "bidirectional",
        "description": "GPIO PC3. Alternate: ADC123_IN13."
      },
      {
        "number": "12",
        "name": "VSSA",
        "type": "power_in",
        "description": "Analog ground reference for ADC/DAC and analog reference block. Connect to system ground with careful star/plane layout."
      },
      {
        "number": "13",
        "name": "VDDA",
        "type": "power_in",
        "description": "Analog supply (2.0-3.6 V) for ADCs, DAC, reset block, PLL and internal reference. On LQFP64 the VREF+/VREF- pads are bonded internally to VDDA/VSSA."
      },
      {
        "number": "14",
        "name": "PA0-WKUP",
        "type": "bidirectional",
        "description": "GPIO PA0 with Standby-mode WKUP input. Alternates: USART2_CTS, ADC123_IN0, TIM2_CH1_ETR, TIM5_CH1, TIM8_ETR."
      },
      {
        "number": "15",
        "name": "PA1",
        "type": "bidirectional",
        "description": "GPIO PA1. Alternates: USART2_RTS, ADC123_IN1, TIM5_CH2, TIM2_CH2."
      },
      {
        "number": "16",
        "name": "PA2",
        "type": "bidirectional",
        "description": "GPIO PA2. Alternates: USART2_TX, TIM5_CH3, ADC123_IN2, TIM2_CH3."
      },
      {
        "number": "17",
        "name": "PA3",
        "type": "bidirectional",
        "description": "GPIO PA3. Alternates: USART2_RX, TIM5_CH4, ADC123_IN3, TIM2_CH4."
      },
      {
        "number": "18",
        "name": "VSS_4",
        "type": "power_in",
        "description": "Digital ground. Tie to system ground."
      },
      {
        "number": "19",
        "name": "VDD_4",
        "type": "power_in",
        "description": "Digital supply (2.0-3.6 V). Decouple with a local 100 nF cap."
      },
      {
        "number": "20",
        "name": "PA4",
        "type": "bidirectional",
        "description": "GPIO PA4. Alternates: SPI1_NSS, USART2_CK, DAC_OUT1, ADC12_IN4."
      },
      {
        "number": "21",
        "name": "PA5",
        "type": "bidirectional",
        "description": "GPIO PA5. Alternates: SPI1_SCK, DAC_OUT2, ADC12_IN5."
      },
      {
        "number": "22",
        "name": "PA6",
        "type": "bidirectional",
        "description": "GPIO PA6. Alternates: SPI1_MISO, TIM8_BKIN, ADC12_IN6, TIM3_CH1, TIM1_BKIN (remap)."
      },
      {
        "number": "23",
        "name": "PA7",
        "type": "bidirectional",
        "description": "GPIO PA7. Alternates: SPI1_MOSI, TIM8_CH1N, ADC12_IN7, TIM3_CH2, TIM1_CH1N (remap)."
      },
      {
        "number": "24",
        "name": "PC4",
        "type": "bidirectional",
        "description": "GPIO PC4. Alternate: ADC12_IN14."
      },
      {
        "number": "25",
        "name": "PC5",
        "type": "bidirectional",
        "description": "GPIO PC5. Alternate: ADC12_IN15."
      },
      {
        "number": "26",
        "name": "PB0",
        "type": "bidirectional",
        "description": "GPIO PB0. Alternates: ADC12_IN8, TIM3_CH3, TIM8_CH2N, TIM1_CH2N (remap)."
      },
      {
        "number": "27",
        "name": "PB1",
        "type": "bidirectional",
        "description": "GPIO PB1. Alternates: ADC12_IN9, TIM3_CH4, TIM8_CH3N, TIM1_CH3N (remap)."
      },
      {
        "number": "28",
        "name": "PB2/BOOT1",
        "type": "bidirectional",
        "description": "GPIO PB2 and BOOT1 boot-mode select input; sampled together with BOOT0 at reset to choose boot memory (main Flash / system memory / SRAM). 5 V-tolerant."
      },
      {
        "number": "29",
        "name": "PB10",
        "type": "bidirectional",
        "description": "GPIO PB10. Alternates: I2C2_SCL, USART3_TX, TIM2_CH3 (remap). 5 V-tolerant."
      },
      {
        "number": "30",
        "name": "PB11",
        "type": "bidirectional",
        "description": "GPIO PB11. Alternates: I2C2_SDA, USART3_RX, TIM2_CH4 (remap). 5 V-tolerant."
      },
      {
        "number": "31",
        "name": "VSS_1",
        "type": "power_in",
        "description": "Digital ground."
      },
      {
        "number": "32",
        "name": "VDD_1",
        "type": "power_in",
        "description": "Digital supply (2.0-3.6 V). Decouple locally."
      },
      {
        "number": "33",
        "name": "PB12",
        "type": "bidirectional",
        "description": "GPIO PB12. Alternates: SPI2_NSS, I2S2_WS, I2C2_SMBA, USART3_CK, TIM1_BKIN. 5 V-tolerant."
      },
      {
        "number": "34",
        "name": "PB13",
        "type": "bidirectional",
        "description": "GPIO PB13. Alternates: SPI2_SCK, I2S2_CK, USART3_CTS, TIM1_CH1N. 5 V-tolerant."
      },
      {
        "number": "35",
        "name": "PB14",
        "type": "bidirectional",
        "description": "GPIO PB14. Alternates: SPI2_MISO, TIM1_CH2N, USART3_RTS. 5 V-tolerant."
      },
      {
        "number": "36",
        "name": "PB15",
        "type": "bidirectional",
        "description": "GPIO PB15. Alternates: SPI2_MOSI, I2S2_SD, TIM1_CH3N. 5 V-tolerant."
      },
      {
        "number": "37",
        "name": "PC6",
        "type": "bidirectional",
        "description": "GPIO PC6. Alternates: I2S2_MCK, TIM8_CH1, SDIO_D6, TIM3_CH1 (remap). 5 V-tolerant."
      },
      {
        "number": "38",
        "name": "PC7",
        "type": "bidirectional",
        "description": "GPIO PC7. Alternates: I2S3_MCK, TIM8_CH2, SDIO_D7, TIM3_CH2 (remap). 5 V-tolerant."
      },
      {
        "number": "39",
        "name": "PC8",
        "type": "bidirectional",
        "description": "GPIO PC8. Alternates: TIM8_CH3, SDIO_D0, TIM3_CH3 (remap). 5 V-tolerant."
      },
      {
        "number": "40",
        "name": "PC9",
        "type": "bidirectional",
        "description": "GPIO PC9. Alternates: TIM8_CH4, SDIO_D1, TIM3_CH4 (remap). 5 V-tolerant."
      },
      {
        "number": "41",
        "name": "PA8",
        "type": "bidirectional",
        "description": "GPIO PA8. Alternates: USART1_CK, TIM1_CH1, MCO clock output. 5 V-tolerant."
      },
      {
        "number": "42",
        "name": "PA9",
        "type": "bidirectional",
        "description": "GPIO PA9. Alternates: USART1_TX, TIM1_CH2. 5 V-tolerant."
      },
      {
        "number": "43",
        "name": "PA10",
        "type": "bidirectional",
        "description": "GPIO PA10. Alternates: USART1_RX, TIM1_CH3. 5 V-tolerant."
      },
      {
        "number": "44",
        "name": "PA11",
        "type": "bidirectional",
        "description": "GPIO PA11. Alternates: USART1_CTS, USBDM (USB D-), CAN_RX, TIM1_CH4. 5 V-tolerant."
      },
      {
        "number": "45",
        "name": "PA12",
        "type": "bidirectional",
        "description": "GPIO PA12. Alternates: USART1_RTS, USBDP (USB D+), CAN_TX, TIM1_ETR. 5 V-tolerant."
      },
      {
        "number": "46",
        "name": "PA13",
        "type": "bidirectional",
        "description": "After reset: JTMS/SWDIO (JTAG mode select / Serial Wire Data). Remappable to GPIO PA13. 5 V-tolerant."
      },
      {
        "number": "47",
        "name": "VSS_2",
        "type": "power_in",
        "description": "Digital ground."
      },
      {
        "number": "48",
        "name": "VDD_2",
        "type": "power_in",
        "description": "Digital supply (2.0-3.6 V)."
      },
      {
        "number": "49",
        "name": "PA14",
        "type": "bidirectional",
        "description": "After reset: JTCK/SWCLK (JTAG clock / Serial Wire Clock). Remappable to GPIO PA14. 5 V-tolerant."
      },
      {
        "number": "50",
        "name": "PA15",
        "type": "bidirectional",
        "description": "After reset: JTDI. Remap functions: TIM2_CH1_ETR, PA15 GPIO, SPI3_NSS, I2S3_WS, SPI1_NSS. 5 V-tolerant."
      },
      {
        "number": "51",
        "name": "PC10",
        "type": "bidirectional",
        "description": "GPIO PC10. Alternates: UART4_TX, SDIO_D2, USART3_TX (remap). 5 V-tolerant."
      },
      {
        "number": "52",
        "name": "PC11",
        "type": "bidirectional",
        "description": "GPIO PC11. Alternates: UART4_RX, SDIO_D3, USART3_RX (remap). 5 V-tolerant."
      },
      {
        "number": "53",
        "name": "PC12",
        "type": "bidirectional",
        "description": "GPIO PC12. Alternates: UART5_TX, SDIO_CK, USART3_CK (remap). 5 V-tolerant."
      },
      {
        "number": "54",
        "name": "PD2",
        "type": "bidirectional",
        "description": "GPIO PD2. Alternates: TIM3_ETR, UART5_RX, SDIO_CMD. 5 V-tolerant."
      },
      {
        "number": "55",
        "name": "PB3",
        "type": "bidirectional",
        "description": "After reset: JTDO/TRACESWO. Remap: GPIO PB3, SPI3_SCK/I2S3_CK, TIM2_CH2, SPI1_SCK. 5 V-tolerant."
      },
      {
        "number": "56",
        "name": "PB4",
        "type": "bidirectional",
        "description": "After reset: NJTRST (JTAG reset, active-low). Remap: GPIO PB4, SPI3_MISO, TIM3_CH1, SPI1_MISO. 5 V-tolerant."
      },
      {
        "number": "57",
        "name": "PB5",
        "type": "bidirectional",
        "description": "GPIO PB5. Alternates: I2C1_SMBA, SPI3_MOSI, I2S3_SD, TIM3_CH2 (remap), SPI1_MOSI (remap). Not 5 V-tolerant."
      },
      {
        "number": "58",
        "name": "PB6",
        "type": "bidirectional",
        "description": "GPIO PB6. Alternates: I2C1_SCL, TIM4_CH1, USART1_TX (remap). 5 V-tolerant."
      },
      {
        "number": "59",
        "name": "PB7",
        "type": "bidirectional",
        "description": "GPIO PB7. Alternates: I2C1_SDA, FSMC_NADV (not usable in LQFP64), TIM4_CH2, USART1_RX (remap). 5 V-tolerant."
      },
      {
        "number": "60",
        "name": "BOOT0",
        "type": "input",
        "description": "Boot mode select input sampled at reset together with PB2/BOOT1 to choose boot from main Flash, system memory (bootloader) or embedded SRAM. Not 5 V-tolerant."
      },
      {
        "number": "61",
        "name": "PB8",
        "type": "bidirectional",
        "description": "GPIO PB8. Alternates: TIM4_CH3, SDIO_D4, I2C1_SCL (remap), CAN_RX (remap). 5 V-tolerant."
      },
      {
        "number": "62",
        "name": "PB9",
        "type": "bidirectional",
        "description": "GPIO PB9. Alternates: TIM4_CH4, SDIO_D5, I2C1_SDA (remap), CAN_TX (remap). 5 V-tolerant."
      },
      {
        "number": "63",
        "name": "VSS_3",
        "type": "power_in",
        "description": "Digital ground."
      },
      {
        "number": "64",
        "name": "VDD_3",
        "type": "power_in",
        "description": "Digital supply (2.0-3.6 V)."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.st.com/resource/en/datasheet/stm32f103ret6.pdf",
        "pages": 143,
        "sha256": "c61db5e362b62f2f",
        "source_tier": "mfr"
      },
      "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"
    },
    "pin1": {
      "pad": "1",
      "at": [
        -5.675,
        -3.75
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "LQFP-64_10x10mm_P0.5mm@sha256:f5a3abeefd7fdfa3",
      "mark": "drawn"
    },
    "mcu": {
      "part_number": "STM32F103RET6",
      "series": "STM32F1",
      "subfamily": "STM32F103",
      "core": "Arm Cortex-M3",
      "frequency_mhz": 72,
      "flash_kb": 512,
      "ram_kb": 64,
      "io_count": 51,
      "package": "LQFP 64 10x10x1.4 mm",
      "marketing_status": "Active",
      "fpu": null,
      "supply_v_min": 2,
      "supply_v_max": 3.6,
      "temp_min_c": -40,
      "temp_max_c": 85,
      "adc_count": 3,
      "timers": 8,
      "in_distributor_stock": true,
      "product_folder": "/en/microcontrollers-microprocessors/stm32f103re.html",
      "source": "st.com portfolio grid CL1734"
    },
    "models_3d": [
      {
        "file": "stm32f103ret6.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          12.0,
          12.0,
          1.5
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "b0c827bc5c05552175d28affe44a5bd2ab45c9c36efff6ff07a74cc449b13db4",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "stm32f103ret6-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          12.0,
          12.0,
          1.5
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "ac0133bdd5e5dec8bbdcde43b1f214be783e09298785acc655e355803c89c1cf",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Core": "Arm Cortex-M3",
      "Max clock": "72 MHz",
      "Flash": "512 kB",
      "RAM": "64 kB",
      "I/O pins": 51,
      "ADC units": 3,
      "ST status": "Active",
      "Manufacturer": "STMicroelectronics",
      "Package": "LQFP-64(10x10)",
      "Category": "MCU",
      "Pins": "64"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "stm32f103ret6"
  ],
  "discovery_pitch": "STM32F103RET6 (STMicroelectronics) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "stm32f103ret6.kicad_sym",
    "stm32f103ret6.kicad_mod",
    "stm32f103ret6.glb",
    "stm32f103ret6.step",
    "stm32f103ret6-etched.step",
    "stm32f103ret6.lbr",
    "docs/hero.png",
    "docs/stm32f103ret6-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "STM32F103RET6RCT6",
      "kind": "packaging"
    },
    {
      "mpn": "STM32F103RET6RCT7",
      "kind": "packaging"
    },
    {
      "mpn": "STM32F103RET6RDT6",
      "kind": "packaging"
    },
    {
      "mpn": "STM32F103RET6RDT7",
      "kind": "packaging"
    },
    {
      "mpn": "STM32F103RET6",
      "kind": "packaging"
    },
    {
      "mpn": "STM32F103RET6RET7",
      "kind": "packaging"
    },
    {
      "mpn": "STM32F103RET6RCY6TR",
      "kind": "packaging"
    },
    {
      "mpn": "STM32F103RET6RDY6TR",
      "kind": "packaging"
    },
    {
      "mpn": "STM32F103RET6REY6TR",
      "kind": "packaging"
    },
    {
      "mpn": "STM32F103RET6VCT6",
      "kind": "packaging"
    },
    {
      "mpn": "STM32F103RET6VCT7",
      "kind": "packaging"
    },
    {
      "mpn": "STM32F103RET6VDT6",
      "kind": "packaging"
    },
    {
      "mpn": "STM32F103RET6VDT7",
      "kind": "packaging"
    },
    {
      "mpn": "STM32F103RET6VET6",
      "kind": "packaging"
    },
    {
      "mpn": "STM32F103RET6VET7",
      "kind": "packaging"
    },
    {
      "mpn": "STM32F103RET6VCH6",
      "kind": "packaging"
    },
    {
      "mpn": "STM32F103RET6VDH6",
      "kind": "packaging"
    },
    {
      "mpn": "STM32F103RET6VEH6",
      "kind": "packaging"
    },
    {
      "mpn": "STM32F103RET6ZCT6",
      "kind": "packaging"
    },
    {
      "mpn": "STM32F103RET6ZCT7",
      "kind": "packaging"
    },
    {
      "mpn": "STM32F103RET6ZDT6",
      "kind": "packaging"
    },
    {
      "mpn": "STM32F103RET6ZDT7",
      "kind": "packaging"
    },
    {
      "mpn": "STM32F103RET6ZET6",
      "kind": "packaging"
    },
    {
      "mpn": "STM32F103RET6ZET7",
      "kind": "packaging"
    },
    {
      "mpn": "STM32F103RET6ZCH6",
      "kind": "packaging"
    },
    {
      "mpn": "STM32F103RET6ZDH6",
      "kind": "packaging"
    },
    {
      "mpn": "STM32F103RET6ZEH6",
      "kind": "packaging"
    }
  ],
  "updated_at": "2026-09-25T08:43:09.087Z"
}