STM32H523RCT6

{
  "slug": "stm32h523rct6",
  "version": "0.1.0",
  "type": "component",
  "description": "STMicroelectronics Microcontrollers (MCU/MPU/SOC), LQFP-64(10x10). Pinout checked against ST's open pin data, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "embedded processors & controllers",
    "stm32h523rct6",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "stm32h523rct6.kicad_sym",
    "stm32h523rct6.kicad_mod",
    "stm32h523rct6.glb",
    "stm32h523rct6.step",
    "stm32h523rct6.lbr",
    "docs/hero.png",
    "docs/stm32h523rct6-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "component": {
    "mpn": "STM32H523RCT6",
    "manufacturer": "STMicroelectronics",
    "package": "LQFP-64(10x10)",
    "pin_count": 64,
    "category": "Embedded Processors & Controllers",
    "subcategory": "Microcontrollers (MCU/MPU/SOC)",
    "datasheet": "https://www.st.com/resource/en/datasheet/stm32h523rct6.pdf",
    "parts": {
      "symbol": "stm32h523rct6.kicad_sym",
      "footprint": "stm32h523rct6.kicad_mod",
      "model_3d": "stm32h523rct6-etched.glb",
      "model_3d_plain": "stm32h523rct6.glb",
      "model_3d_step": "stm32h523rct6-etched.step",
      "model_3d_step_plain": "stm32h523rct6.step",
      "lbr": "stm32h523rct6.lbr"
    },
    "distributor_links": {
      "lcsc": "C26125142",
      "digikey": "497-STM32H523RCT6-ND",
      "mouser": "511-STM32H523RCT6"
    },
    "distributor_check": {
      "checked_at": "2026-10-01T07:03:51Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "497-STM32H523RCT6-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "511-STM32H523RCT6",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VBAT",
        "type": "power_in",
        "description": "Backup domain supply for RTC and backup registers, 1.2 V to 3.6 V."
      },
      {
        "number": "2",
        "name": "PC13",
        "type": "bidirectional",
        "description": "FT_t I/O supplied via the VSW power switch, output speed limited to 2 MHz with max 30 pF load and not usable as a current source; additional functions TAMP_IN1/TAMP_OUT2/TAMP_OUT3, RTC_OUT1/RTC_TS, WKUP4."
      },
      {
        "number": "3",
        "name": "PC14-OSC32_IN",
        "type": "bidirectional",
        "description": "FT I/O supplied via the VSW power switch (2 MHz, 30 pF output limit) that also serves as the 32.768 kHz LSE oscillator input OSC32_IN."
      },
      {
        "number": "4",
        "name": "PC15-OSC32_OUT",
        "type": "bidirectional",
        "description": "FT I/O supplied via the VSW power switch (2 MHz, 30 pF output limit) that also serves as the 32.768 kHz LSE oscillator output OSC32_OUT."
      },
      {
        "number": "5",
        "name": "PH0-OSC_IN",
        "type": "bidirectional",
        "description": "FT I/O (PH0) that also serves as the 4-50 MHz HSE oscillator input OSC_IN."
      },
      {
        "number": "6",
        "name": "PH1-OSC_OUT",
        "type": "bidirectional",
        "description": "FT I/O (PH1) that also serves as the 4-50 MHz HSE oscillator output OSC_OUT."
      },
      {
        "number": "7",
        "name": "NRST",
        "type": "bidirectional",
        "description": "Bidirectional reset pin (RST structure) with embedded weak pull-up resistor."
      },
      {
        "number": "8",
        "name": "PC0",
        "type": "bidirectional",
        "description": "FT_a I/O with SPI4_MISO, SPI2_RDY, FMC_A25, OCTOSPI1_IO7 alternate functions and ADC12_INP10 analog input."
      },
      {
        "number": "9",
        "name": "PC1",
        "type": "bidirectional",
        "description": "FT_ah I/O with TRACED0, SPI2_MOSI/I2S2_SDO, SPI4_MOSI, OCTOSPI1_IO4 alternates; ADC12_INP11, ADC12_INN10, TAMP_IN3/TAMP_OUT5, WKUP6."
      },
      {
        "number": "10",
        "name": "PC2",
        "type": "bidirectional",
        "description": "FT_a I/O with PWR_CSLEEP, TIM4_CH4, SPI2_MISO/I2S2_SDI, OCTOSPI1_IO5/IO2 alternates; ADC12_INP12, ADC12_INN11."
      },
      {
        "number": "11",
        "name": "PC3",
        "type": "bidirectional",
        "description": "FT_a I/O with PWR_CSTOP, LPUART1_TX, SPI2_MOSI/I2S2_SDO, OCTOSPI1_IO6/IO0 alternates; ADC12_INP13, ADC12_INN12."
      },
      {
        "number": "12",
        "name": "VSSA",
        "type": "power_in",
        "description": "Analog ground (VSSA/VREF- on the LQFP64 pinout); must always be connected to the external supply ground."
      },
      {
        "number": "13",
        "name": "VDDA",
        "type": "power_in",
        "description": "Analog supply (VDDA/VREF+ on the LQFP64 pinout): 1.62 V min when ADC used, 1.8 V min with DAC, 2.1 V min with VREFBUF, max 3.6 V."
      },
      {
        "number": "14",
        "name": "PA0",
        "type": "bidirectional",
        "description": "FT_at I/O with TIM2_CH1, TIM5_CH1, USART2_CTS, UART4_TX, FDCAN2_RX alternates; ADC12_INP0, TAMP_IN2/TAMP_OUT1, WKUP1; tamper input functional in Standby and VBAT mode."
      },
      {
        "number": "15",
        "name": "PA1",
        "type": "bidirectional",
        "description": "FT_aht I/O with TIM2_CH2, TIM5_CH2, OCTOSPI1_DQS, USART2_RTS/DE, UART4_RX alternates; ADC12_INP1, TAMP_IN5/TAMP_OUT4; tamper functional in Standby and VBAT mode."
      },
      {
        "number": "16",
        "name": "PA2",
        "type": "bidirectional",
        "description": "FT_at I/O with TIM2_CH3, TIM5_CH3, LPUART1_TX, USART2_TX alternates; ADC12_INP14, TAMP_IN4/TAMP_OUT3, WKUP2."
      },
      {
        "number": "17",
        "name": "PA3",
        "type": "bidirectional",
        "description": "FT_ah I/O with TIM2_CH4, TIM5_CH4, OCTOSPI1_CLK, SPI2_NSS/I2S2_WS, USART2_RX alternates; ADC12_INP15."
      },
      {
        "number": "18",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground pin; all VSS pins must be connected to ground."
      },
      {
        "number": "19",
        "name": "VDD",
        "type": "power_in",
        "description": "Digital supply, 1.71 V to 3.6 V (HSLV=0) or 1.71 V to 2.7 V (HSLV=1); must be decoupled with 100 nF ceramic capacitor."
      },
      {
        "number": "20",
        "name": "PA4",
        "type": "bidirectional",
        "description": "TT_a I/O (3.6 V tolerant) with TIM5_ETR, LPTIM2_CH1, SPI1_NSS/I2S1_WS, SPI3_NSS, USART2_CK alternates; ADC12_INP18, DAC1_OUT1."
      },
      {
        "number": "21",
        "name": "PA5",
        "type": "bidirectional",
        "description": "TT_ah I/O (3.6 V tolerant) with TIM2_CH1, TIM8_CH1N, SPI1_SCK/I2S1_CK alternates; ADC12_INP19, ADC12_INN18, DAC1_OUT2."
      },
      {
        "number": "22",
        "name": "PA6",
        "type": "bidirectional",
        "description": "FT_ah I/O with TIM1_BKIN, TIM3_CH1, TIM8_BKIN, SPI1_MISO/I2S1_SDI, OCTOSPI1_IO3 alternates; ADC12_INP3."
      },
      {
        "number": "23",
        "name": "PA7",
        "type": "bidirectional",
        "description": "FT_ah I/O with TIM1_CH1N, TIM3_CH2, TIM8_CH1N, SPI1_MOSI/I2S1_SDO, OCTOSPI1_IO2, FMC_NWE alternates; ADC12_INP7, ADC12_INN3."
      },
      {
        "number": "24",
        "name": "PC4",
        "type": "bidirectional",
        "description": "FT_a I/O with TIM2_CH4, LPTIM2_ETR, I2S1_MCK, USART3_RX alternates; ADC12_INP4."
      },
      {
        "number": "25",
        "name": "PC5",
        "type": "bidirectional",
        "description": "FT_ah I/O with TIM1_CH4N, PSSI_D15, SPI4_SCK, OCTOSPI1_DQS alternates; ADC12_INP8, ADC12_INN4."
      },
      {
        "number": "26",
        "name": "PB0",
        "type": "bidirectional",
        "description": "FT_ah I/O with TIM1_CH2N, TIM3_CH3, TIM8_CH2N, SPI3_MISO/I2S3_SDI, OCTOSPI1_IO1, USART2_TX, UART4_CTS alternates; ADC12_INP9, ADC12_INN5."
      },
      {
        "number": "27",
        "name": "PB1",
        "type": "bidirectional",
        "description": "FT_ah I/O with TIM1_CH3N, TIM3_CH4, TIM8_CH3N, SPI3_SCK, SPI2_NSS/I2S2_WS, OCTOSPI1_IO0, USART3_RX alternates; ADC12_INP5."
      },
      {
        "number": "28",
        "name": "PB2",
        "type": "bidirectional",
        "description": "FT_ah I/O with RTC_OUT2, TIM8_CH4N, SPI1_RDY, LPTIM1_CH1, SPI2_SCK, OCTOSPI1_CLK/DQS, SDMMC1_CMD alternates; additional function LSCO."
      },
      {
        "number": "29",
        "name": "PB10",
        "type": "bidirectional",
        "description": "FT_f (Fm+ capable) I/O with TIM2_CH3, TIM8_CH1, LPTIM2_IN1, I2C2_SCL, SPI2_SCK/I2S2_CK, USART3_TX, OCTOSPI1_NCS alternates."
      },
      {
        "number": "30",
        "name": "VCAP",
        "type": "passive",
        "description": "Core voltage (VCORE) regulator external capacitor pin; with regulator off, external VCORE of 0.97 V to 1.40 V depending on VOS range is supplied here."
      },
      {
        "number": "31",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground pin; all VSS pins must be connected to ground."
      },
      {
        "number": "32",
        "name": "VDD",
        "type": "power_in",
        "description": "Digital supply, 1.71 V to 3.6 V (HSLV=0) or 1.71 V to 2.7 V (HSLV=1); must be decoupled with 100 nF ceramic capacitor."
      },
      {
        "number": "33",
        "name": "PB12",
        "type": "bidirectional",
        "description": "FT_h I/O with TIM1_BKIN, TIM8_CH3, OCTOSPI1_NCLK, I2C2_SDA, SPI2_NSS/I2S2_WS, UCPD1_FRSTX, USART3_CK, FDCAN2_RX, UART5_RX alternates."
      },
      {
        "number": "34",
        "name": "PB13",
        "type": "bidirectional",
        "description": "FT_c I/O (5.0 V max input) with TIM1_CH1N, TIM8_CH2, LPTIM2_CH1, I2C2_SMBA, SPI2_SCK, USART3_CTS, LPUART1_RX, FDCAN2_TX, SDMMC1_D0, UART5_TX alternates; UCPD1_CC1."
      },
      {
        "number": "35",
        "name": "PB14",
        "type": "bidirectional",
        "description": "FT_c I/O (5.0 V max input) with TIM1_CH2N, TIM12_CH1, TIM8_CH2N, USART1_TX, SPI2_MISO, USART3_RTS/DE, UART4_RTS/DE alternates; UCPD1_CC2."
      },
      {
        "number": "36",
        "name": "PB15",
        "type": "bidirectional",
        "description": "FT_h I/O with RTC_REFIN, TIM1_CH3N, TIM12_CH2, TIM8_CH3N, USART1_RX, SPI2_MOSI, SPI1_MOSI, UART4_CTS, OCTOSPI1_CLK, UART5_RX alternates; PVD_IN."
      },
      {
        "number": "37",
        "name": "PC6",
        "type": "bidirectional",
        "description": "FT_h I/O with TIM3_CH1, TIM8_CH1, I2S2_MCK, USART6_TX, SDMMC1_D0DIR, FMC_NWAIT, I3C2_SCL, OCTOSPI1_IO5, SDMMC1_D6, DCMI_D0/PSSI_D0 alternates."
      },
      {
        "number": "38",
        "name": "PC7",
        "type": "bidirectional",
        "description": "FT_h I/O with TRGIO, TIM3_CH2, TIM8_CH2, I2S3_MCK, USART6_RX, SDMMC1_D123DIR, FMC_NE1, I3C2_SDA, OCTOSPI1_IO6, SDMMC1_D7, DCMI_D1/PSSI_D1 alternates."
      },
      {
        "number": "39",
        "name": "PC8",
        "type": "bidirectional",
        "description": "FT_h I/O with TRACED1, TIM3_CH3, TIM8_CH3, USART6_CK, UART5_RTS/DE, FMC_NE2/NCE, FMC_INT, FMC_ALE, SDMMC1_D0, DCMI_D2/PSSI_D2 alternates."
      },
      {
        "number": "40",
        "name": "PC9",
        "type": "bidirectional",
        "description": "FT_fh I/O with MCO2, TIM3_CH4, TIM8_CH4, I2C3_SDA, AUDIOCLK, UART5_CTS, OCTOSPI1_IO0, FMC_CLE, SDMMC1_D1, DCMI_D3/PSSI_D3 alternates; UCPD1_DB2."
      },
      {
        "number": "41",
        "name": "PA8",
        "type": "bidirectional",
        "description": "FT_fh I/O with MCO1, TIM1_CH1, TIM8_BKIN2, I2C3_SCL, SPI1_RDY, SPI4_MOSI, USART1_CK, I3C2_SCL, USB_SOF, FMC_NOE, DCMI_D3/PSSI_D3 alternates."
      },
      {
        "number": "42",
        "name": "PA9",
        "type": "bidirectional",
        "description": "FT_h I/O with TIM1_CH2, LPUART1_TX, I2C3_SMBA, SPI2_SCK/I2S2_CK, USART1_TX, FMC_NWE, DCMI_D0/PSSI_D0 alternates; UCPD1_DB1."
      },
      {
        "number": "43",
        "name": "PA10",
        "type": "bidirectional",
        "description": "FT_h I/O with TIM1_CH3, LPUART1_RX, LPTIM2_IN2, UCPD1_FRSTX, USART1_RX, FDCAN2_TX, SDMMC1_D0, DCMI_D1/PSSI_D1 alternates."
      },
      {
        "number": "44",
        "name": "PA11",
        "type": "bidirectional",
        "description": "FT_u I/O supplied by VDDUSB with TIM1_CH4, LPUART1_CTS, SPI2_NSS, UART4_RX, USART1_CTS, FDCAN1_RX alternates and USB_DM function."
      },
      {
        "number": "45",
        "name": "PA12",
        "type": "bidirectional",
        "description": "FT_u I/O supplied by VDDUSB with TIM1_ETR, LPUART1_RTS/DE, SPI2_SCK, UART4_TX, USART1_RTS/DE, FDCAN1_TX alternates and USB_DP function."
      },
      {
        "number": "46",
        "name": "PA13(JTMS/SWDIO)",
        "type": "bidirectional",
        "description": "FT I/O configured after reset as JTMS/SWDIO debug function with internal pull-up active."
      },
      {
        "number": "47",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground pin; all VSS pins must be connected to ground."
      },
      {
        "number": "48",
        "name": "VDD",
        "type": "power_in",
        "description": "Digital supply, 1.71 V to 3.6 V (HSLV=0) or 1.71 V to 2.7 V (HSLV=1); must be decoupled with 100 nF ceramic capacitor."
      },
      {
        "number": "49",
        "name": "PA14(JTCK/SWCLK)",
        "type": "bidirectional",
        "description": "FT I/O configured after reset as JTCK/SWCLK debug function with internal pull-down active."
      },
      {
        "number": "50",
        "name": "PA15 (JTDI)",
        "type": "bidirectional",
        "description": "FT I/O configured after reset as JTDI with internal pull-up active; alternates include TIM2_CH1, HDMI_CEC, SPI1_NSS, SPI3_NSS, USART1_TX, UART4_RTS/DE, OCTOSPI1_NCS, FMC_NBL1."
      },
      {
        "number": "51",
        "name": "PC10",
        "type": "bidirectional",
        "description": "FT_h I/O with I3C2_SCL, SPI3_SCK/I2S3_CK, USART3_TX, UART4_TX, OCTOSPI1_IO1, SDMMC1_D2, DCMI_D8/PSSI_D8 alternates."
      },
      {
        "number": "52",
        "name": "PC11",
        "type": "bidirectional",
        "description": "FT_h I/O with I3C2_SDA, SPI3_MISO/I2S3_SDI, USART3_RX, UART4_RX, OCTOSPI1_NCS, SDMMC1_D3, DCMI_D4/PSSI_D4 alternates."
      },
      {
        "number": "53",
        "name": "PC12",
        "type": "bidirectional",
        "description": "FT_h I/O with TRACED3, TIM15_CH1, LPTIM2_CH2, SPI3_MOSI/I2S3_SDO, USART3_CK, UART5_TX, SDMMC1_CK, DCMI_D9/PSSI_D9 alternates."
      },
      {
        "number": "54",
        "name": "PD2",
        "type": "bidirectional",
        "description": "FT_h I/O with TRACED2, TIM3_ETR, TIM15_BKIN, UART5_RX, SDMMC1_CMD, DCMI_D11/PSSI_D11 alternates; WKUP7."
      },
      {
        "number": "55",
        "name": "PB3(JTDO/TRACESWO)",
        "type": "bidirectional",
        "description": "FT_h I/O configured after reset as JTDO/TRACESWO; alternates include TIM2_CH2, I3C2_SCL, I2C2_SDA, SPI1_SCK, SPI3_SCK, LPUART1_TX, FDCAN2_TX, CRS_SYNC, UART5_TX."
      },
      {
        "number": "56",
        "name": "PB4 (NJTRST)",
        "type": "bidirectional",
        "description": "FT_h I/O configured after reset as NJTRST with internal pull-up active; alternates include TIM3_CH1, OCTOSPI1_CLK, LPTIM1_CH2, SPI1_MISO, SPI3_MISO, I2C3_SDA, I3C2_SDA."
      },
      {
        "number": "57",
        "name": "PB5",
        "type": "bidirectional",
        "description": "FT_h I/O with TIM3_CH2, OCTOSPI1_NCLK, I2C1_SMBA, SPI1_MOSI, USART6_TX, SPI3_MOSI, FDCAN2_RX, I3C2_SCL, UART5_RX alternates."
      },
      {
        "number": "58",
        "name": "PB6",
        "type": "bidirectional",
        "description": "FT_f (Fm+ capable) I/O with TIM4_CH1, I3C1_SCL, I2C1_SCL, HDMI_CEC, USART6_RX, USART1_TX, LPUART1_TX, FDCAN2_TX, OCTOSPI1_NCS, UART5_TX alternates."
      },
      {
        "number": "59",
        "name": "PB7",
        "type": "bidirectional",
        "description": "FT_fa (Fm+ capable) I/O with TIM4_CH2, I3C1_SDA, I2C1_SDA, SPI4_MISO, USART6_CTS, USART1_RX, LPUART1_RX, FDCAN1_TX, FMC_NL alternates; WKUP5."
      },
      {
        "number": "60",
        "name": "BOOT0",
        "type": "input",
        "description": "Boot mode selection input (B structure); input voltage up to min(min(VDD, VDDA, VDDUSB, VDDIO2) + 3.6 V, 5.5 V) per operating conditions."
      },
      {
        "number": "61",
        "name": "PB8",
        "type": "bidirectional",
        "description": "FT_fsh (Fm+ capable) I/O supplied by VDDIO2 with TIM4_CH3, I3C1_SCL, I2C1_SCL, SPI4_RDY, SPI3_NSS, SDMMC1_CKIN, UART4_RX, FDCAN1_RX, SDMMC1_D4 alternates."
      },
      {
        "number": "62",
        "name": "VCAP",
        "type": "passive",
        "description": "Core voltage (VCORE) regulator external capacitor pin; with regulator off, external VCORE of 0.97 V to 1.40 V depending on VOS range is supplied here."
      },
      {
        "number": "63",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground pin; all VSS pins must be connected to ground."
      },
      {
        "number": "64",
        "name": "VDD",
        "type": "power_in",
        "description": "Digital supply, 1.71 V to 3.6 V (HSLV=0) or 1.71 V to 2.7 V (HSLV=1); must be decoupled with 100 nF ceramic capacitor."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-4-5-20251001",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Pins 26, 31-33, and 59-64 pin types and exact descriptions should be verified against Table 13 pages",
          "6/64 pins cited to the wrong page (name found elsewhere): ['55:PA15@p74', '56:PC10@p74', '57:PC11@p74', '61:PD2@p75']"
        ],
        "pages_sent": 89,
        "cost_usd": 0.6982,
        "at": "2026-10-01T07:03:25"
      },
      "datasheet": {
        "url": "https://www.st.com/resource/en/datasheet/stm32h523rct6.pdf",
        "pages": 226,
        "sha256": "196eff2d8315b480",
        "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"
    }
  }
}