STM32H523RET6

{
  "schema_version": 1,
  "type": "component",
  "slug": "stm32h523ret6",
  "title": "STM32H523RET6",
  "brief": "STMicroelectronics Microcontrollers (MCU/MPU/SOC), LQFP-64(10x10). 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",
    "stm32h523ret6",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "STM32H523RET6",
    "manufacturer": "STMicroelectronics",
    "package": "LQFP-64(10x10)",
    "pin_count": 64,
    "category": "Embedded Processors & Controllers",
    "subcategory": "Microcontrollers (MCU/MPU/SOC)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8604444214013153280",
    "parts": {
      "symbol": "stm32h523ret6.kicad_sym",
      "footprint": "stm32h523ret6.kicad_mod",
      "model_3d": "stm32h523ret6-hero.glb",
      "model_3d_plain": "stm32h523ret6-etched.glb",
      "model_3d_step": "stm32h523ret6-etched.step",
      "model_3d_step_plain": "stm32h523ret6.step",
      "lbr": "stm32h523ret6.lbr"
    },
    "distributor_links": {
      "lcsc": "C22456086",
      "digikey": "497-STM32H523RET6-ND"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T21:04:12Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "497-STM32H523RET6-ND",
        "status": "found"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VBAT",
        "type": "power_in",
        "description": "Backup-domain supply for the RTC and backup registers, 1.2 V to 3.6 V."
      },
      {
        "number": "2",
        "name": "PC13",
        "type": "bidirectional",
        "description": "5 V-tolerant GPIO (FT_t) with tamper function (TAMP_IN1/TAMP_OUT2/TAMP_OUT3), RTC_OUT1/RTC_TS and WKUP4; supplied through the power switch, so output speed must not exceed 2 MHz at 30 pF and it must not be used as a current source."
      },
      {
        "number": "3",
        "name": "PC14-OSC32_IN",
        "type": "bidirectional",
        "description": "5 V-tolerant GPIO (FT) that serves as LSE oscillator input OSC32_IN; supplied through the power switch, so output use is limited to 2 MHz at 30 pF and no current sourcing."
      },
      {
        "number": "4",
        "name": "PC15-OSC32_OUT",
        "type": "bidirectional",
        "description": "5 V-tolerant GPIO (FT) that serves as LSE oscillator output OSC32_OUT; supplied through the power switch, so output use is limited to 2 MHz at 30 pF and no current sourcing."
      },
      {
        "number": "5",
        "name": "PH0-OSC_IN",
        "type": "bidirectional",
        "description": "5 V-tolerant GPIO (FT) that serves as HSE oscillator input OSC_IN for the 4-50 MHz HSE."
      },
      {
        "number": "6",
        "name": "PH1-OSC_OUT",
        "type": "bidirectional",
        "description": "5 V-tolerant GPIO (FT) that serves as HSE oscillator output OSC_OUT for the 4-50 MHz HSE."
      },
      {
        "number": "7",
        "name": "NRST",
        "type": "bidirectional",
        "description": "Bidirectional reset pin with embedded weak pull-up resistor."
      },
      {
        "number": "8",
        "name": "PC0",
        "type": "bidirectional",
        "description": "5 V-tolerant GPIO (FT_a) with analog-switch function supplied by VDDA and ADC12_INP10 analog input; alternate functions include SPI4_MISO and OCTOSPI1_IO7."
      },
      {
        "number": "9",
        "name": "PC1",
        "type": "bidirectional",
        "description": "5 V-tolerant GPIO (FT_ah) with analog-switch function supplied by VDDA, ADC12_INP11/ADC12_INN10 inputs, TAMP_IN3/TAMP_OUT5 and WKUP6 functions."
      },
      {
        "number": "10",
        "name": "PC2",
        "type": "bidirectional",
        "description": "5 V-tolerant GPIO (FT_a) with analog-switch function supplied by VDDA, ADC12_INP12/ADC12_INN11 analog inputs and PWR_CSLEEP alternate function."
      },
      {
        "number": "11",
        "name": "PC3",
        "type": "bidirectional",
        "description": "5 V-tolerant GPIO (FT_a) with analog-switch function supplied by VDDA, ADC12_INP13/ADC12_INN12 analog inputs and PWR_CSTOP alternate function."
      },
      {
        "number": "12",
        "name": "VSSA",
        "type": "power_in",
        "description": "Analog ground pin that must always be connected to the external power supply within the permitted range."
      },
      {
        "number": "13",
        "name": "VDDA",
        "type": "power_in",
        "description": "Analog supply: 1.62 V to 3.6 V when the ADC is used, 1.8 V minimum when the DAC is used and 2.1 V minimum when VREFBUF is used."
      },
      {
        "number": "14",
        "name": "PA0",
        "type": "bidirectional",
        "description": "5 V-tolerant GPIO (FT_at) with analog-switch function supplied by VDDA, ADC12_INP0/ADC12_INN1 inputs, WKUP1 and a tamper input (TAMP_IN2) functional in Standby and VBAT mode."
      },
      {
        "number": "15",
        "name": "PA1",
        "type": "bidirectional",
        "description": "5 V-tolerant GPIO (FT_aht) with analog-switch function supplied by VDDA, high-speed low-voltage capability, ADC12_INP1 input and TAMP_OUT4 tamper output functional in Standby and VBAT mode."
      },
      {
        "number": "16",
        "name": "PA2",
        "type": "bidirectional",
        "description": "5 V-tolerant GPIO (FT_at) with analog-switch function supplied by VDDA, ADC12_INP14 input, WKUP2 and TAMP_IN4/TAMP_OUT3 tamper functions."
      },
      {
        "number": "17",
        "name": "PA3",
        "type": "bidirectional",
        "description": "5 V-tolerant GPIO (FT_ah) with analog-switch function supplied by VDDA and ADC12_INP15 analog input."
      },
      {
        "number": "18",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground reference pin; all voltages are referenced to VSS."
      },
      {
        "number": "19",
        "name": "VDD",
        "type": "power_in",
        "description": "Main supply: 1.71 V to 3.6 V with HSLV = 0, or 1.71 V to 2.7 V with HSLV = 1."
      },
      {
        "number": "20",
        "name": "PA4",
        "type": "bidirectional",
        "description": "3.6 V-tolerant GPIO (TT_a) with analog-switch function supplied by VDDA, ADC12_INP18 input and DAC1_OUT1 output."
      },
      {
        "number": "21",
        "name": "PA5",
        "type": "bidirectional",
        "description": "3.6 V-tolerant GPIO (TT_ah) with analog-switch function supplied by VDDA, ADC12_INP19/ADC12_INN18 inputs and DAC1_OUT2 output."
      },
      {
        "number": "22",
        "name": "PA6",
        "type": "bidirectional",
        "description": "5 V-tolerant GPIO (FT_ah) with analog-switch function supplied by VDDA and ADC12_INP3 analog input."
      },
      {
        "number": "23",
        "name": "PA7",
        "type": "bidirectional",
        "description": "5 V-tolerant GPIO (FT_ah) with analog-switch function supplied by VDDA and ADC12_INP7/ADC12_INN3 analog inputs."
      },
      {
        "number": "24",
        "name": "PC4",
        "type": "bidirectional",
        "description": "5 V-tolerant GPIO (FT_a) with analog-switch function supplied by VDDA and ADC12_INP4 analog input."
      },
      {
        "number": "25",
        "name": "PC5",
        "type": "bidirectional",
        "description": "5 V-tolerant GPIO (FT_ah) with analog-switch function supplied by VDDA and ADC12_INP8/ADC12_INN4 analog inputs."
      },
      {
        "number": "26",
        "name": "PB0",
        "type": "bidirectional",
        "description": "5 V-tolerant GPIO (FT_ah) with analog-switch function supplied by VDDA and ADC12_INP9/ADC12_INN5 analog inputs."
      },
      {
        "number": "27",
        "name": "PB1",
        "type": "bidirectional",
        "description": "5 V-tolerant GPIO (FT_ah) with analog-switch function supplied by VDDA and ADC12_INP5 analog input."
      },
      {
        "number": "28",
        "name": "PB2",
        "type": "bidirectional",
        "description": "5 V-tolerant GPIO (FT_ah) with analog-switch function supplied by VDDA; LSCO is an additional function."
      },
      {
        "number": "29",
        "name": "PB10",
        "type": "bidirectional",
        "description": "5 V-tolerant Fm+-capable GPIO (FT_f) with alternate functions including I2C2_SCL, SPI2_SCK and USART3_TX."
      },
      {
        "number": "30",
        "name": "VCAP",
        "type": "power_in",
        "description": "VCORE regulator connection; when the internal regulator is OFF, VCORE must be supplied from an external regulator on the VCAP pins."
      },
      {
        "number": "31",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground reference pin; all voltages are referenced to VSS."
      },
      {
        "number": "32",
        "name": "VDD",
        "type": "power_in",
        "description": "Main supply: 1.71 V to 3.6 V with HSLV = 0, or 1.71 V to 2.7 V with HSLV = 1."
      },
      {
        "number": "33",
        "name": "PB12",
        "type": "bidirectional",
        "description": "5 V-tolerant GPIO (FT_h) with high-speed low-voltage mode capability and alternate functions including TIM1_BKIN and I2C2_SDA."
      },
      {
        "number": "34",
        "name": "PB13",
        "type": "bidirectional",
        "description": "5 V-tolerant USB Type-C/PD I/O (FT_c) with UCPD1_CC1 function and input range -0.3 V to 5.0 V."
      },
      {
        "number": "35",
        "name": "PB14",
        "type": "bidirectional",
        "description": "5 V-tolerant USB Type-C/PD I/O (FT_c) with UCPD1_CC2 function and input range -0.3 V to 5.0 V."
      },
      {
        "number": "36",
        "name": "PB15",
        "type": "bidirectional",
        "description": "5 V-tolerant GPIO (FT_h) with PVD_IN additional function and alternate functions including RTC_REFIN and TIM1_CH3N."
      },
      {
        "number": "37",
        "name": "PC6",
        "type": "bidirectional",
        "description": "5 V-tolerant GPIO (FT_h) with alternate functions including TIM3_CH1, FMC_NWAIT and DCMI_D0/PSSI_D0."
      },
      {
        "number": "38",
        "name": "PC7",
        "type": "bidirectional",
        "description": "5 V-tolerant GPIO (FT_h) with alternate functions including TIM3_CH2, FMC_NE1 and DCMI_D1/PSSI_D1."
      },
      {
        "number": "39",
        "name": "PC8",
        "type": "bidirectional",
        "description": "5 V-tolerant GPIO (FT_h) with alternate functions including TIM3_CH3, FMC_NE2/FMC_NCE and DCMI_D2/PSSI_D2."
      },
      {
        "number": "40",
        "name": "PC9",
        "type": "bidirectional",
        "description": "5 V-tolerant Fm+-capable GPIO (FT_fh) with alternate functions including MCO2, I2C3_SDA and AUDIOCLK, and UCPD1_DB2 additional function."
      },
      {
        "number": "41",
        "name": "PA8",
        "type": "bidirectional",
        "description": "5 V-tolerant Fm+-capable GPIO (FT_fh) with alternate functions including MCO1, I2C3_SCL, USB_SOF and TIM1_CH1."
      },
      {
        "number": "42",
        "name": "PA9",
        "type": "bidirectional",
        "description": "5 V-tolerant GPIO (FT_h) with alternate functions including TIM1_CH2, LPUART1_TX and USART1_TX, and UCPD1_DB1 additional function."
      },
      {
        "number": "43",
        "name": "PA10",
        "type": "bidirectional",
        "description": "5 V-tolerant GPIO (FT_h) with alternate functions including TIM1_CH3, LPUART1_RX, USART1_RX and UCPD1_FRSTX."
      },
      {
        "number": "44",
        "name": "PA11",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O (FT_u) with USB function (USB_DM) supplied by VDDUSB, plus TIM1_CH4 and USART1_CTS alternate functions."
      },
      {
        "number": "45",
        "name": "PA12",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O (FT_u) with USB function (USB_DP) supplied by VDDUSB, plus TIM1_ETR and USART1_RTS alternate functions."
      },
      {
        "number": "46",
        "name": "PA13",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O (FT) that is configured as JTMS/SWDIO after reset, with the internal pull-up activated."
      },
      {
        "number": "47",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground reference pin; all voltages are referenced to VSS."
      },
      {
        "number": "48",
        "name": "VDD",
        "type": "power_in",
        "description": "Main supply: 1.71 V to 3.6 V with HSLV = 0, or 1.71 V to 2.7 V with HSLV = 1."
      },
      {
        "number": "49",
        "name": "PA14",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O (FT) that is configured as JTCK/SWCLK after reset, with the internal pull-down activated."
      },
      {
        "number": "50",
        "name": "PA15",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O (FT) that is configured as JTDI after reset, with the internal pull-up activated; also TIM2_CH1 and DCMI_D11/PSSI_D11 alternate functions."
      },
      {
        "number": "51",
        "name": "PC10",
        "type": "bidirectional",
        "description": "5 V-tolerant GPIO (FT_h) with alternate functions including I3C2_SCL, USART3_TX and DCMI_D8/PSSI_D8."
      },
      {
        "number": "52",
        "name": "PC11",
        "type": "bidirectional",
        "description": "5 V-tolerant GPIO (FT_h) with alternate functions including I3C2_SDA, USART3_RX and SDMMC1_D3."
      },
      {
        "number": "53",
        "name": "PC12",
        "type": "bidirectional",
        "description": "5 V-tolerant GPIO (FT_h) with alternate functions including TRACED3, TIM15_CH1 and USART3_CK."
      },
      {
        "number": "54",
        "name": "PD2",
        "type": "bidirectional",
        "description": "5 V-tolerant GPIO (FT_h) with WKUP7 wake-up function and alternate functions including TRACED2 and SDMMC1_CMD."
      },
      {
        "number": "55",
        "name": "PB3",
        "type": "bidirectional",
        "description": "5 V-tolerant GPIO (FT_h) with JTDO/TRACESWO function and alternate functions including TIM2_CH2 and LPUART1_TX."
      },
      {
        "number": "56",
        "name": "PB4",
        "type": "bidirectional",
        "description": "5 V-tolerant GPIO (FT_h) that is configured as NJTRST after reset, with the internal pull-up activated; also TIM3_CH1 and OCTOSPI1_CLK alternate functions."
      },
      {
        "number": "57",
        "name": "PB5",
        "type": "bidirectional",
        "description": "5 V-tolerant GPIO (FT_h) with alternate functions including TIM3_CH2, I2C1_SMBA and USART6_TX."
      },
      {
        "number": "58",
        "name": "PB6",
        "type": "bidirectional",
        "description": "5 V-tolerant Fm+-capable GPIO (FT_f) with alternate functions including I3C1_SCL, I2C1_SCL and USART6_RX."
      },
      {
        "number": "59",
        "name": "PB7",
        "type": "bidirectional",
        "description": "5 V-tolerant Fm+-capable GPIO (FT_fa) with analog-switch function supplied by VDDA, WKUP5 wake-up function and I2C1_SDA alternate function."
      },
      {
        "number": "60",
        "name": "BOOT0",
        "type": "input",
        "description": "Boot input whose voltage must stay between VSS and min(min(VDD, VDDA, VDDUSB, VDDIO2) + 4.0 V, 6.0 V), per Table 16."
      },
      {
        "number": "61",
        "name": "PB8",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O (FT_fsh) with high-speed low-voltage and Fm+ capability, supplied only by VDDIO2 (_s)."
      },
      {
        "number": "62",
        "name": "VCAP",
        "type": "power_in",
        "description": "VCORE regulator connection; when the internal regulator is OFF, VCORE must be supplied from an external regulator on the VCAP pins."
      },
      {
        "number": "63",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground reference pin; all voltages are referenced to VSS."
      },
      {
        "number": "64",
        "name": "VDD",
        "type": "power_in",
        "description": "Main supply: 1.71 V to 3.6 V with HSLV = 0, or 1.71 V to 2.7 V with HSLV = 1."
      }
    ],
    "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 selection: the ordering code STM32H523RET6 decodes as R = 64 pins, E = 512 Kbytes, T = LQFP,; VREF+ is not bonded on LQFP64 (Table 13 note 1: VREFBUF is unavailable and must stay disabled when V; VDDIO2 and VDDUSB have no pin on LQFP64 in Table 13 (dash in the LQFP64 column). PA11 and PA12 are U"
        ],
        "pages_sent": 89,
        "cost_usd": 0.4383,
        "at": "2026-10-18T21:03:46"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8604444214013153280",
        "pages": 226,
        "sha256": "196eff2d8315b480",
        "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"
    },
    "models_3d": [
      {
        "file": "stm32h523ret6.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          12,
          12,
          1.5
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "b0c827bc5c05552175d28affe44a5bd2ab45c9c36efff6ff07a74cc449b13db4",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "stm32h523ret6-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          12,
          12,
          1.5
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "1c867751cf9e15b1a971bb6a2b45d9a78302e3e68691aa6d1cbb300766a02793",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "STMicroelectronics",
      "Package": "LQFP-64(10x10)",
      "Category": "Embedded Processors & Controllers",
      "Pins": "64"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "196eff2d8315b480063a6d83d76358872b4e45e8b3d6dcc314e6e8c4f94da175",
      "rows": [
        {
          "name": "External main supply voltage (VDDA, VDDUSB, VDDIO2, VBAT, VREF+)",
          "symbol": "VDDx - VSS",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 4,
          "conditions": "",
          "source_page": 95,
          "source": "datasheet"
        },
        {
          "name": "I/O supply voltage, HSLV = 0",
          "symbol": "VDDIOx - VSS",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 4,
          "conditions": "HSLV = 0",
          "source_page": 95,
          "source": "datasheet"
        },
        {
          "name": "I/O supply voltage, HSLV = 1",
          "symbol": "VDDIOx - VSS",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 2.75,
          "conditions": "HSLV = 1",
          "source_page": 95,
          "source": "datasheet"
        },
        {
          "name": "Input voltage on FT_xxx pins except FT_c",
          "symbol": "VIN",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": null,
          "conditions": "Referenced to VSS; max is formula min(min(VDD,VDDA,VDDUSB,VDDIO2)+4.0, 6.0 V)",
          "source_page": 95,
          "source": "datasheet"
        },
        {
          "name": "Input voltage on FT_t in VBAT mode",
          "symbol": "VIN",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": null,
          "conditions": "Referenced to VSS; max is formula min(min(VBAT,VDDA,VDDUSB,VDDIO2)+4.0 V, 6.0 V)",
          "source_page": 95,
          "source": "datasheet"
        },
        {
          "name": "Input voltage on TT_xx pins",
          "symbol": "VIN",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 4,
          "conditions": "Referenced to VSS",
          "source_page": 95,
          "source": "datasheet"
        },
        {
          "name": "Input voltage on FT_c pins",
          "symbol": "VIN",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 5.5,
          "conditions": "",
          "source_page": 95,
          "source": "datasheet"
        },
        {
          "name": "Input voltage on any other pins",
          "symbol": "VIN",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 4,
          "conditions": "",
          "source_page": 95,
          "source": "datasheet"
        },
        {
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