STM32L452REI3

{
  "slug": "stm32l452rei3",
  "version": "0.1.0",
  "type": "component",
  "description": "STMicroelectronics Microcontrollers (MCU/MPU/SOC), UFBGA-64. Pinout checked against ST's open pin data, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "embedded processors & controllers",
    "stm32l452rei3",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "stm32l452rei3.kicad_sym",
    "stm32l452rei3.kicad_mod",
    "stm32l452rei3.glb",
    "stm32l452rei3.step",
    "stm32l452rei3.lbr",
    "docs/hero.png",
    "docs/stm32l452rei3-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "stm32l452rei3-hero.glb",
    "stm32l452rei3-hero.overlay.json"
  ],
  "component": {
    "mpn": "STM32L452REI3",
    "manufacturer": "STMicroelectronics",
    "package": "UFBGA-64",
    "pin_count": 64,
    "category": "Embedded Processors & Controllers",
    "subcategory": "Microcontrollers (MCU/MPU/SOC)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588952285866680320",
    "parts": {
      "symbol": "stm32l452rei3.kicad_sym",
      "footprint": "stm32l452rei3.kicad_mod",
      "model_3d": "stm32l452rei3-hero.glb",
      "model_3d_plain": "stm32l452rei3.glb",
      "model_3d_step": "stm32l452rei3-etched.step",
      "model_3d_step_plain": "stm32l452rei3.step",
      "lbr": "stm32l452rei3.lbr"
    },
    "distributor_links": {
      "lcsc": "C1340153",
      "digikey": "497-17985-ND",
      "mouser": "511-STM32L452REI3"
    },
    "distributor_check": {
      "checked_at": "2026-10-11T14:04:09Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "497-17985-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "511-STM32L452REI3",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "A1",
        "name": "PC14-OSC32_IN",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O (FT) fed from the backup-domain power switch, which sinks only 3 mA, so as a GPIO output it must not exceed 2 MHz / 30 pF and must not source current such as an LED; it is the OSC32_IN LSE oscillator input."
      },
      {
        "number": "A2",
        "name": "PC13",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O (FT) on the backup-domain power switch (3 mA sink limit), limited to 2 MHz with a 30 pF maximum load and not to be used as a current source; additional functions include RTC_TAMP1/RTC_TS/RTC_OUT/WKUP2."
      },
      {
        "number": "A3",
        "name": "PB9",
        "type": "bidirectional",
        "description": "5 V-tolerant Fm+-capable I/O (FT_f, up to 1 Mbit/s I2C) with alternate functions IR_OUT, I2C1_SDA, SPI2_NSS, CAN1_TX, SDMMC1_D5, SAI1_FS_A and EVENTOUT."
      },
      {
        "number": "A4",
        "name": "PB4 (NJTRST)",
        "type": "bidirectional",
        "description": "5 V-tolerant Fm+-capable I/O with analog switch function supplied by VDDA (FT_fa); after reset it is the NJTRST JTAG function with its internal pull-up active, and it also offers TIM3_CH1, I2C3_SDA, SPI1_MISO, SPI3_MISO, USART1_CTS and COMP2_INP."
      },
      {
        "number": "A5",
        "name": "PB3 (JTDO/TRACESWO)",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with analog switch function supplied by VDDA (FT_a); after reset it is configured as the JTDO/TRACESWO debug function, with alternate functions TIM2_CH2, SPI1_SCK, SPI3_SCK, USART1_RTS_DE and SAI1_SCK_B."
      },
      {
        "number": "A6",
        "name": "PA15 (JTDI)",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O (FT) that after reset is the JTDI debug function with its internal pull-up activated; alternates include TIM2_CH1, TIM2_ETR, USART2_RX, SPI1_NSS, SPI3_NSS, USART3_RTS_DE, UART4_RTS_DE and TSC_G3_IO1."
      },
      {
        "number": "A7",
        "name": "PA14 (JTCK/SWCLK)",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O (FT) that after reset is the JTCK/SWCLK debug function with its internal pull-down activated; alternates include LPTIM1_OUT, I2C1_SMBA, I2C4_SMBA and SAI1_FS_B."
      },
      {
        "number": "A8",
        "name": "PA13 (JTMS/SWDIO)",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O (FT) that after reset is the JTMS/SWDIO debug function with its internal pull-up activated; alternates include IR_OUT, USB_NOE and SAI1_SD_B."
      },
      {
        "number": "B1",
        "name": "PC15-OSC32_OUT",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O (FT) on the backup-domain power switch (3 mA sink limit), limited to 2 MHz with a 30 pF maximum load and not to be used as a current source; it is the OSC32_OUT LSE oscillator output."
      },
      {
        "number": "B2",
        "name": "VBAT",
        "type": "power_in",
        "description": "Backup-domain supply for the RTC and 32x32-bit backup registers, specified 1.55 V to 3.6 V."
      },
      {
        "number": "B3",
        "name": "PB8",
        "type": "bidirectional",
        "description": "5 V-tolerant Fm+-capable I/O (FT_f) with alternate functions I2C1_SCL, CAN1_RX, SDMMC1_D4, SAI1_MCLK_A and TIM16_CH1."
      },
      {
        "number": "B4",
        "name": "PH3-BOOT0",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O (FT) that is the BOOT0 boot-mode selection pin, with EVENTOUT as its alternate function."
      },
      {
        "number": "B5",
        "name": "PD2",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O (FT) with alternate functions TRACED2, TIM3_ETR, USART3_RTS_DE, TSC_SYNC, SDMMC1_CMD and EVENTOUT."
      },
      {
        "number": "B6",
        "name": "PC11",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O (FT) with alternate functions SPI3_MISO, USART3_RX, UART4_RX, TSC_G3_IO3 and SDMMC1_D3."
      },
      {
        "number": "B7",
        "name": "PC10",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O (FT) with alternate functions TRACED1, SPI3_SCK, USART3_TX, UART4_TX, TSC_G3_IO2 and SDMMC1_D2."
      },
      {
        "number": "B8",
        "name": "PA12",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with USB function supplied by VDDUSB (FT_u); alternates include TIM1_ETR, SPI1_MOSI, USART1_RTS_DE, CAN1_TX and USB_DP."
      },
      {
        "number": "C1",
        "name": "PH0-OSC_IN",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O (FT) whose default function is the OSC_IN input of the external high-speed oscillator (4 to 48 MHz crystal) with EVENTOUT as alternate."
      },
      {
        "number": "C2",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground pin; all VSS pins must be connected to the ground plane."
      },
      {
        "number": "C3",
        "name": "PB7",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with analog switch function supplied by VDDA (FT_fa); alternates include LPTIM1_IN2, I2C1_SDA, I2C4_SDA, USART1_RX, UART4_CTS and TSC_G2_IO4, and it is also the PVD_IN input and COMP2_INM."
      },
      {
        "number": "C4",
        "name": "PB5",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O (FT) with alternate functions LPTIM1_IN1, TIM3_CH2, CAN1_RX, I2C1_SMBA, SPI1_MOSI, SPI3_MOSI, USART1_CK, TSC_G2_IO2, COMP2_OUT, SAI1_SD_B and TIM16_BKIN."
      },
      {
        "number": "C5",
        "name": "PC12",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O (FT) with alternate functions TRACED3, SPI3_MOSI, USART3_CK, TSC_G3_IO4 and SDMMC1_CK."
      },
      {
        "number": "C6",
        "name": "PA10",
        "type": "bidirectional",
        "description": "5 V-tolerant Fm+-capable I/O (FT_f) with alternate functions TIM1_CH3, I2C1_SDA, USART1_RX, USB_CRS_SYNC and SAI1_SD_A."
      },
      {
        "number": "C7",
        "name": "PA9",
        "type": "bidirectional",
        "description": "5 V-tolerant Fm+-capable I/O (FT_f) with alternate functions TIM1_CH2, I2C1_SCL, DFSDM1_DATIN1, USART1_TX, SAI1_FS_A and TIM15_BKIN."
      },
      {
        "number": "C8",
        "name": "PA11",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with USB function supplied by VDDUSB (FT_u); alternates include TIM1_CH4, SPI1_MISO, COMP1_OUT, USART1_CTS, CAN1_RX and USB_DM."
      },
      {
        "number": "D1",
        "name": "PH1-OSC_OUT",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O (FT) whose default function is the OSC_OUT output of the external high-speed oscillator, with EVENTOUT as alternate."
      },
      {
        "number": "D2",
        "name": "VDD",
        "type": "power_in",
        "description": "Main standard supply, 1.71 V to 3.6 V."
      },
      {
        "number": "D3",
        "name": "PB6",
        "type": "bidirectional",
        "description": "5 V-tolerant Fm+-capable I/O with analog switch function supplied by VDDA (FT_fa); alternates include LPTIM1_ETR, I2C1_SCL, I2C4_SCL, USART1_TX, CAN1_TX, SAI1_FS_B and TIM16_CH1N, and it is also COMP2_INP."
      },
      {
        "number": "D4",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground pin; all VSS pins must be connected to the ground plane."
      },
      {
        "number": "D5",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground pin; all VSS pins must be connected to the ground plane."
      },
      {
        "number": "D6",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground pin; all VSS pins must be connected to the ground plane."
      },
      {
        "number": "D7",
        "name": "PA8",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O (FT) with alternate functions MCO, TIM1_CH1, DFSDM1_CKIN1, USART1_CK, SAI1_SCK_A and LPTIM2_OUT."
      },
      {
        "number": "D8",
        "name": "PC9",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O (FT) with alternate functions TIM3_CH4, TSC_G4_IO4, USB_NOE and SDMMC1_D1."
      },
      {
        "number": "E1",
        "name": "NRST",
        "type": "bidirectional",
        "description": "Bidirectional reset pin with embedded weak pull-up resistor."
      },
      {
        "number": "E2",
        "name": "PC1",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with analog switch function supplied by VDDA (FT_fa); alternates include TRACED0, LPTIM1_OUT, I2C4_SDA, I2C3_SDA, LPUART1_TX, and it is ADC1_IN2."
      },
      {
        "number": "E3",
        "name": "PC0",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with analog switch function supplied by VDDA (FT_fa); alternates include LPTIM1_IN1, I2C4_SCL, I2C3_SCL, LPUART1_RX and LPTIM2_IN1, and it is ADC1_IN1."
      },
      {
        "number": "E4",
        "name": "VDD",
        "type": "power_in",
        "description": "Main standard supply, 1.71 V to 3.6 V."
      },
      {
        "number": "E5",
        "name": "VDDUSB",
        "type": "power_in",
        "description": "USB supply: 3.0 V to 3.6 V when USB is used; 0 to 3.6 V when USB is not used."
      },
      {
        "number": "E6",
        "name": "VDD",
        "type": "power_in",
        "description": "Main standard supply, 1.71 V to 3.6 V."
      },
      {
        "number": "E7",
        "name": "PC7",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O (FT) with alternate functions TIM3_CH2, DFSDM1_DATIN3, TSC_G4_IO2 and SDMMC1_D7."
      },
      {
        "number": "E8",
        "name": "PC8",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O (FT) with alternate functions TIM3_CH3, TSC_G4_IO3 and SDMMC1_D0."
      },
      {
        "number": "F1",
        "name": "VSSA/VREF-",
        "type": "power_in",
        "description": "Analog ground combined with the negative ADC reference voltage VREF-, which is connected internally to VSSA in this package."
      },
      {
        "number": "F2",
        "name": "PC2",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with analog switch function supplied by VDDA (FT_a); alternates include LPTIM1_IN2, SPI2_MISO and DFSDM1_CKOUT, and it is ADC1_IN3."
      },
      {
        "number": "F3",
        "name": "PA2",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with analog switch function supplied by VDDA (FT_a); alternates include TIM2_CH3, USART2_TX, LPUART1_TX, QUADSPI_BK1_NCS, COMP2_OUT and TIM15_CH1, and it is COMP2_INM, ADC1_IN7 and WKUP4/LSCO."
      },
      {
        "number": "F4",
        "name": "PA5",
        "type": "bidirectional",
        "description": "3.6 V-tolerant I/O with analog switch function supplied by VDDA (TT_a); alternates include TIM2_CH1, TIM2_ETR, SPI1_SCK, DFSDM1_CKOUT and LPTIM2_ETR, and it is COMP1_INM, COMP2_INM and ADC1_IN10."
      },
      {
        "number": "F5",
        "name": "PB0",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with analog switch function supplied by VDDA (FT_a); alternates include TIM1_CH2N, TIM3_CH3, SPI1_NSS, DFSDM1_CKIN0, USART3_CK, QUADSPI_BK1_IO1, COMP1_OUT and SAI1_EXTCLK, and it is ADC1_IN15."
      },
      {
        "number": "F6",
        "name": "PC6",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O (FT) with alternate functions TIM3_CH1, DFSDM1_CKIN3, TSC_G4_IO1 and SDMMC1_D6."
      },
      {
        "number": "F7",
        "name": "PB15",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O (FT) with alternate functions RTC_REFIN, TIM1_CH3N, SPI2_MOSI, DFSDM1_CKIN2, TSC_G1_IO4, SAI1_SD_A and TIM15_CH2."
      },
      {
        "number": "F8",
        "name": "PB14",
        "type": "bidirectional",
        "description": "5 V-tolerant Fm+-capable I/O (FT_f) with alternate functions TIM1_CH2N, I2C2_SDA, SPI2_MISO, DFSDM1_DATIN2, USART3_RTS_DE, TSC_G1_IO3, SAI1_MCLK_A and TIM15_CH1."
      },
      {
        "number": "G1",
        "name": "PC3",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with analog switch function supplied by VDDA (FT_a); alternates include LPTIM1_ETR, SPI2_MOSI, SAI1_SD_A and LPTIM2_ETR, and it is ADC1_IN4."
      },
      {
        "number": "G2",
        "name": "PA0",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with analog switch function supplied by VDDA (FT_a); alternates include TIM2_CH1, USART2_CTS, UART4_TX, COMP1_OUT, SAI1_EXTCLK and TIM2_ETR, and it is OPAMP1_VINP, COMP1_INM, ADC1_IN5 and RTC_TAMP2/WKUP1."
      },
      {
        "number": "G3",
        "name": "PA3",
        "type": "bidirectional",
        "description": "3.6 V-tolerant I/O with analog switch function supplied by VDDA (TT_a); alternates include TIM2_CH4, USART2_RX, LPUART1_RX, QUADSPI_CLK, SAI1_MCLK_A and TIM15_CH2, and it is OPAMP1_VOUT, COMP2_INP and ADC1_IN8."
      },
      {
        "number": "G4",
        "name": "PA6",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with analog switch function supplied by VDDA (FT_a); alternates include TIM1_BKIN, TIM3_CH1, SPI1_MISO, COMP1_OUT, USART3_CTS, LPUART1_CTS, QUADSPI_BK1_IO3 and TIM16_CH1, and it is ADC1_IN11."
      },
      {
        "number": "G5",
        "name": "PB1",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with analog switch function supplied by VDDA (FT_a); alternates include TIM1_CH3N, TIM3_CH4, DFSDM1_DATIN0, USART3_RTS_DE, LPUART1_RTS_DE, QUADSPI_BK1_IO0 and LPTIM2_IN1, and it is COMP1_INM and ADC1_IN16."
      },
      {
        "number": "G6",
        "name": "PB2",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with analog switch function supplied by VDDA (FT_a); alternates include RTC_OUT, LPTIM1_OUT, I2C3_SMBA and DFSDM1_CKIN0, and it is COMP1_INP."
      },
      {
        "number": "G7",
        "name": "PB10",
        "type": "bidirectional",
        "description": "5 V-tolerant Fm+-capable I/O (FT_f) with alternate functions TIM2_CH3, I2C4_SCL, I2C2_SCL, SPI2_SCK, USART3_TX, LPUART1_RX, TSC_SYNC, QUADSPI_CLK, COMP1_OUT and SAI1_SCK_A."
      },
      {
        "number": "G8",
        "name": "PB13",
        "type": "bidirectional",
        "description": "5 V-tolerant Fm+-capable I/O (FT_f) with alternate functions TIM1_CH1N, I2C2_SCL, SPI2_SCK, DFSDM1_CKIN1, USART3_CTS, LPUART1_CTS, TSC_G1_IO2, CAN1_TX, SAI1_SCK_A and TIM15_CH1N."
      },
      {
        "number": "H1",
        "name": "VDDA/VREF+",
        "type": "power_in",
        "description": "Analog supply (1.62 V minimum when ADC or COMP is used, 3.6 V maximum) combined with the ADC positive reference VREF+, which is connected internally to VDDA in this package."
      },
      {
        "number": "H2",
        "name": "PA1",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with analog switch function supplied by VDDA (FT_a); alternates include TIM2_CH2, I2C1_SMBA, SPI1_SCK, USART2_RTS_DE, UART4_RX and TIM15_CH1N, and it is OPAMP1_VINM, COMP1_INP and ADC1_IN6."
      },
      {
        "number": "H3",
        "name": "PA4",
        "type": "bidirectional",
        "description": "3.6 V-tolerant I/O with analog switch function supplied by VDDA (TT_a); alternates include SPI1_NSS, SPI3_NSS, USART2_CK, SAI1_FS_B and LPTIM2_OUT, and it is COMP1_INM, COMP2_INM, ADC1_IN9 and DAC1_OUT1."
      },
      {
        "number": "H4",
        "name": "PA7",
        "type": "bidirectional",
        "description": "5 V-tolerant Fm+-capable I/O with analog switch function supplied by VDDA (FT_fa); alternates include TIM1_CH1N, TIM3_CH2, I2C3_SCL, SPI1_MOSI, DFSDM1_DATIN0, QUADSPI_BK1_IO2 and COMP2_OUT, and it is ADC1_IN12."
      },
      {
        "number": "H5",
        "name": "PC4",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with analog switch function supplied by VDDA (FT_a); alternate function USART3_TX, and it is COMP1_INM and ADC1_IN13."
      },
      {
        "number": "H6",
        "name": "PC5",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with analog switch function supplied by VDDA (FT_a); alternate function USART3_RX, and it is COMP1_INP, ADC1_IN14 and WKUP5."
      },
      {
        "number": "H7",
        "name": "PB11",
        "type": "bidirectional",
        "description": "5 V-tolerant Fm+-capable I/O (FT_f) with alternate functions TIM2_CH4, I2C4_SDA, I2C2_SDA, USART3_RX, LPUART1_TX, QUADSPI_BK1_NCS and COMP2_OUT."
      },
      {
        "number": "H8",
        "name": "PB12",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O (FT) with alternate functions TIM1_BKIN, TIM1_BKIN_COMP2, I2C2_SMBA, SPI2_NSS, DFSDM1_DATIN1, USART3_CK, LPUART1_RTS_DE, TSC_G1_IO1, CAN1_RX, SAI1_FS_A and TIM15_BKIN."
      }
    ],
    "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: MPN STM32L452REI3 decodes to 64 pins (R), 512 KB Flash (E), UFBGA package (I), -40 to 125 °C (3). Th; UFBGA64 bonds out only 64 balls. Port E pins PE0-PE15 and most of port D (PD0, PD1, PD3-PD15) have n; Ball F1 is a combined VSSA/VREF- pin and ball H1 is a combined VDDA/VREF+ pin. The datasheet states "
        ],
        "pages_sent": 83,
        "cost_usd": 0.3819,
        "at": "2026-10-11T14:03:55"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588952285866680320",
        "pages": 221,
        "sha256": "0c90cbe36d057ab4",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 64,
        "described": 64,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
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