STM32L552ZCT6Q

{
  "slug": "stm32l552zct6q",
  "version": "0.1.0",
  "type": "component",
  "description": "STMicroelectronics Microcontroller Units (MCUs/MPUs/SOCs), LQFP-144(20x20). Pinout checked against ST's open pin data, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "single chip microcomputer-microcontroller",
    "stm32l552zct6q",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "stm32l552zct6q.kicad_sym",
    "stm32l552zct6q.kicad_mod",
    "stm32l552zct6q.glb",
    "stm32l552zct6q.step",
    "stm32l552zct6q.lbr",
    "docs/hero.png",
    "docs/stm32l552zct6q-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "stm32l552zct6q-hero.glb",
    "stm32l552zct6q-hero.overlay.json"
  ],
  "component": {
    "mpn": "STM32L552ZCT6Q",
    "manufacturer": "STMicroelectronics",
    "package": "LQFP-144(20x20)",
    "pin_count": 144,
    "category": "Single Chip Microcomputer/Microcontroller",
    "subcategory": "Microcontroller Units (MCUs/MPUs/SOCs)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588940358961008640",
    "parts": {
      "symbol": "stm32l552zct6q.kicad_sym",
      "footprint": "stm32l552zct6q.kicad_mod",
      "model_3d": "stm32l552zct6q-hero.glb",
      "model_3d_plain": "stm32l552zct6q.glb",
      "model_3d_step": "stm32l552zct6q-etched.step",
      "model_3d_step_plain": "stm32l552zct6q.step",
      "lbr": "stm32l552zct6q.lbr"
    },
    "distributor_links": {
      "lcsc": "C1236657",
      "digikey": "497-STM32L552ZCT6Q-ND",
      "mouser": "511-STM32L552ZCT6Q"
    },
    "distributor_check": {
      "checked_at": "2026-10-08T21:48:22Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "497-STM32L552ZCT6Q-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "511-STM32L552ZCT6Q",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "PE2",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate functions include TRACECK, TIM3_ETR, SAI1_CK1, TSC_G7_IO1, FMC_A23 and SAI1_MCLK_A."
      },
      {
        "number": "2",
        "name": "PE3",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate functions include TRACED0, TIM3_CH1, OCTOSPI1_DQS, TSC_G7_IO2, FMC_A19 and SAI1_SD_B."
      },
      {
        "number": "3",
        "name": "PE4",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate functions include TRACED1, TIM3_CH2, SAI1_D2, DFSDM1_DATIN3, TSC_G7_IO3 and FMC_A20."
      },
      {
        "number": "4",
        "name": "PE5",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate functions include TRACED2, TIM3_CH3, SAI1_CK2, DFSDM1_CKIN3, TSC_G7_IO4 and FMC_A21."
      },
      {
        "number": "5",
        "name": "PE6",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate functions include TRACED3, TIM3_CH4, SAI1_D1 and FMC_A22; additional functions WKUP3 and TAMP_IN3/TAMP_OUT6."
      },
      {
        "number": "6",
        "name": "VBAT",
        "type": "power_in",
        "description": "Backup domain supply for the RTC, the 32 kHz oscillator and backup registers when VDD is absent, 1.55 V to 3.6 V."
      },
      {
        "number": "7",
        "name": "PC13",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O supplied through the VBAT power switch, which sinks only 3 mA, so output speed must not exceed 2 MHz at 30 pF and it must not drive current sources such as LEDs; additional functions WKUP2, RTC_TS/RTC_OUT1 and TAMP_IN1/TAMP_OUT2."
      },
      {
        "number": "8",
        "name": "PC14-OSC32_IN",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O supplied through the VBAT power switch with the same 3 mA and output-speed limits as PC13; additional function OSC32_IN (LSE input)."
      },
      {
        "number": "9",
        "name": "PC15-OSC32_OUT",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O supplied through the VBAT power switch with the same 3 mA and output-speed limits as PC13; additional function OSC32_OUT (LSE output)."
      },
      {
        "number": "10",
        "name": "PF0",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with Fm+ capability (FT_f); alternate functions I2C2_SDA, FMC_A0 and EVENTOUT."
      },
      {
        "number": "11",
        "name": "PF1",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with Fm+ capability (FT_f); alternate functions I2C2_SCL, FMC_A1 and EVENTOUT."
      },
      {
        "number": "12",
        "name": "PF2",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate functions I2C2_SMBA, FMC_A2 and EVENTOUT."
      },
      {
        "number": "13",
        "name": "PF3",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate functions LPTIM3_IN1, FMC_A3 and EVENTOUT."
      },
      {
        "number": "14",
        "name": "PF4",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate functions LPTIM3_ETR, FMC_A4 and EVENTOUT."
      },
      {
        "number": "15",
        "name": "PF5",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate functions LPTIM3_OUT, FMC_A5 and EVENTOUT."
      },
      {
        "number": "16",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground pin for the digital supply domain."
      },
      {
        "number": "17",
        "name": "VDD",
        "type": "power_in",
        "description": "Main supply for I/Os, the internal regulator and system analog blocks, 1.71 V to 3.6 V."
      },
      {
        "number": "18",
        "name": "PF6",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate functions TIM5_ETR, TIM5_CH1, OCTOSPI1_IO3, SAI1_SD_B and EVENTOUT."
      },
      {
        "number": "19",
        "name": "PF7",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate functions TIM5_CH2, OCTOSPI1_IO2, SAI1_MCLK_B and EVENTOUT; additional function TAMP_IN6/TAMP_OUT3."
      },
      {
        "number": "20",
        "name": "PF8",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate functions TIM5_CH3, OCTOSPI1_IO0, SAI1_SCK_B and EVENTOUT; additional function TAMP_IN7/TAMP_OUT8."
      },
      {
        "number": "21",
        "name": "PF9",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate functions TIM5_CH4, OCTOSPI1_IO1, SAI1_FS_B, TIM15_CH1 and EVENTOUT; additional function TAMP_IN8/TAMP_OUT7."
      },
      {
        "number": "22",
        "name": "PF10",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate functions OCTOSPI1_CLK, DFSDM1_CKOUT, SAI1_D3, TIM15_CH2 and EVENTOUT."
      },
      {
        "number": "23",
        "name": "PH0-OSC_IN",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; additional function OSC_IN (HSE oscillator input) and EVENTOUT."
      },
      {
        "number": "24",
        "name": "PH1-OSC_OUT",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; additional function OSC_OUT (HSE oscillator output) and EVENTOUT."
      },
      {
        "number": "25",
        "name": "NRST",
        "type": "bidirectional",
        "description": "Bidirectional reset pin with embedded weak pull-up resistor."
      },
      {
        "number": "26",
        "name": "PC0",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with Fm+ capability and analog switch (FT_fa); alternate functions LPTIM1_IN1, OCTOSPI1_IO7, I2C3_SCL, LPUART1_RX, SDMMC1_D5, SAI2_FS_A and LPTIM2_IN1; additional function ADC12_IN1."
      },
      {
        "number": "27",
        "name": "PC1",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with Fm+ capability and analog switch (FT_fa); alternate functions TRACED0, LPTIM1_OUT, SPI2_MOSI, I2C3_SDA, LPUART1_TX and OCTOSPI1_IO4; additional function ADC12_IN2."
      },
      {
        "number": "28",
        "name": "PC2",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with analog switch (FT_a); alternate functions LPTIM1_IN2, SPI2_MISO, DFSDM1_CKOUT and OCTOSPI1_IO5; additional function ADC12_IN3."
      },
      {
        "number": "29",
        "name": "PC3",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with analog switch (FT_a); alternate functions LPTIM1_ETR, LPTIM3_OUT, SAI1_D1, SPI2_MOSI, OCTOSPI1_IO6 and SAI1_SD_A; additional function ADC12_IN4."
      },
      {
        "number": "30",
        "name": "VSSA/VREF-",
        "type": "power_in",
        "description": "Analog ground for ADC, DAC, OPAMP, COMP and VREFBUF; in this package VREF- is bonded to VSSA and must always equal VSSA."
      },
      {
        "number": "31",
        "name": "VREF+",
        "type": "power_in",
        "description": "Positive reference voltage for ADCs and DACs and output of the internal voltage reference buffer when enabled; when VDDA < 2 V it must equal VDDA, and when VDDA >= 2 V it must be between 2 V and VDDA."
      },
      {
        "number": "32",
        "name": "VDDA",
        "type": "power_in",
        "description": "Analog supply for ADC/COMP (1.62 V min), DAC/OPAMP (1.8 V min) and VREFBUF (2.4 V min) up to 3.6 V; preferably connected to VDD when these blocks are unused."
      },
      {
        "number": "33",
        "name": "PA0",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with analog switch (FT_a); alternate functions TIM2_CH1, TIM5_CH1, TIM8_ETR, USART2_CTS/USART2_NSS, UART4_TX, SAI1_EXTCLK and TIM2_ETR; additional functions OPAMP1_VINP, ADC12_IN5, WKUP1 and TAMP_IN2/TAMP_OUT1."
      },
      {
        "number": "34",
        "name": "PA1",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with analog switch (FT_a); alternate functions TIM2_CH2, TIM5_CH2, I2C1_SMBA, SPI1_SCK, USART2_RTS/USART2_DE, UART4_RX and OCTOSPI1_DQS; additional functions OPAMP1_VINM, ADC12_IN6 and TAMP_IN5/TAMP_OUT4."
      },
      {
        "number": "35",
        "name": "PA2",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with analog switch (FT_a); alternate functions TIM2_CH3, TIM5_CH3, USART2_TX, LPUART1_TX, OCTOSPI1_NCS, UCPD1_FRSTX1 and SAI2_EXTCLK; additional functions ADC12_IN7, WKUP4/LSCO and COMP1_INP."
      },
      {
        "number": "36",
        "name": "PA3",
        "type": "bidirectional",
        "description": "3.6 V-tolerant I/O with analog switch (TT_a); alternate functions TIM2_CH4, TIM5_CH4, SAI1_CK1, USART2_RX, LPUART1_RX, OCTOSPI1_CLK and SAI1_MCLK_A; additional functions OPAMP1_VOUT and ADC12_IN8."
      },
      {
        "number": "37",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground pin for the digital supply domain."
      },
      {
        "number": "38",
        "name": "VDD",
        "type": "power_in",
        "description": "Main supply for I/Os, the internal regulator and system analog blocks, 1.71 V to 3.6 V."
      },
      {
        "number": "39",
        "name": "PA4",
        "type": "bidirectional",
        "description": "3.6 V-tolerant I/O with analog switch (TT_a); alternate functions OCTOSPI1_NCS, SPI1_NSS, SPI3_NSS, USART2_CK, SAI1_FS_B and LPTIM2_OUT; additional functions ADC12_IN9 and DAC1_OUT1."
      },
      {
        "number": "40",
        "name": "PA5",
        "type": "bidirectional",
        "description": "3.6 V-tolerant I/O with analog switch (TT_a); alternate functions TIM2_CH1, TIM2_ETR, TIM8_CH1N, SPI1_SCK and LPTIM2_ETR; additional functions ADC12_IN10 and DAC1_OUT2."
      },
      {
        "number": "41",
        "name": "PA6",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with analog switch (FT_a); alternate functions TIM1_BKIN, TIM3_CH1, TIM8_BKIN, SPI1_MISO, USART3_CTS/USART3_NSS, LPUART1_CTS, OCTOSPI1_IO3 and TIM16_CH1; additional functions OPAMP2_VINP and ADC12_IN11."
      },
      {
        "number": "42",
        "name": "PA7",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with Fm+ capability and analog switch (FT_fa); alternate functions TIM1_CH1N, TIM3_CH2, TIM8_CH1N, I2C3_SCL, SPI1_MOSI, OCTOSPI1_IO2 and TIM17_CH1; additional functions OPAMP2_VINM and ADC12_IN12."
      },
      {
        "number": "43",
        "name": "PB0",
        "type": "bidirectional",
        "description": "3.6 V-tolerant I/O with analog switch (TT_a); alternate functions TIM1_CH2N, TIM3_CH3, TIM8_CH2N, SPI1_NSS, USART3_CK, OCTOSPI1_IO1, COMP1_OUT and SAI1_EXTCLK; additional functions OPAMP2_VOUT and ADC12_IN15."
      },
      {
        "number": "44",
        "name": "PB1",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with analog switch (FT_a); alternate functions TIM1_CH3N, TIM3_CH4, TIM8_CH3N, DFSDM1_DATIN0, USART3_RTS/USART3_DE, LPUART1_RTS/LPUART1_DE, OCTOSPI1_IO0 and LPTIM2_IN1; additional functions COMP1_INM and ADC12_IN16."
      },
      {
        "number": "45",
        "name": "PB2",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with analog switch (FT_a); alternate functions LPTIM1_OUT, I2C3_SMBA, DFSDM1_CKIN0, OCTOSPI1_DQS and UCPD1_FRSTX1; additional functions RTC_OUT2 and COMP1_INP."
      },
      {
        "number": "46",
        "name": "PF11",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate function OCTOSPI1_NCLK and EVENTOUT."
      },
      {
        "number": "47",
        "name": "PF12",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate function FMC_A6 and EVENTOUT."
      },
      {
        "number": "48",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground pin for the digital supply domain."
      },
      {
        "number": "49",
        "name": "VDD",
        "type": "power_in",
        "description": "Main supply for I/Os, the internal regulator and system analog blocks, 1.71 V to 3.6 V."
      },
      {
        "number": "50",
        "name": "PF13",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate functions I2C4_SMBA, FMC_A7 and EVENTOUT."
      },
      {
        "number": "51",
        "name": "PF14",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with Fm+ capability (FT_f); alternate functions I2C4_SCL, TSC_G8_IO1, FMC_A8 and EVENTOUT."
      },
      {
        "number": "52",
        "name": "PF15",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with Fm+ capability (FT_f); alternate functions I2C4_SDA, TSC_G8_IO2, FMC_A9 and EVENTOUT."
      },
      {
        "number": "53",
        "name": "PG0",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate functions TSC_G8_IO3, FMC_A10 and EVENTOUT."
      },
      {
        "number": "54",
        "name": "PG1",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate functions TSC_G8_IO4, FMC_A11 and EVENTOUT."
      },
      {
        "number": "55",
        "name": "PE7",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate functions TIM1_ETR, DFSDM1_DATIN2, FMC_D4, SAI1_SD_B and EVENTOUT."
      },
      {
        "number": "56",
        "name": "PE8",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate functions TIM1_CH1N, DFSDM1_CKIN2, FMC_D5, SAI1_SCK_B and EVENTOUT."
      },
      {
        "number": "57",
        "name": "PE9",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate functions TIM1_CH1, DFSDM1_CKOUT, OCTOSPI1_NCLK, FMC_D6 and SAI1_FS_B."
      },
      {
        "number": "58",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground pin for the digital supply domain."
      },
      {
        "number": "59",
        "name": "VDD",
        "type": "power_in",
        "description": "Main supply for I/Os, the internal regulator and system analog blocks, 1.71 V to 3.6 V."
      },
      {
        "number": "60",
        "name": "PE10",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate functions TIM1_CH2N, TSC_G5_IO1, OCTOSPI1_CLK, FMC_D7 and SAI1_MCLK_B."
      },
      {
        "number": "61",
        "name": "PE11",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate functions TIM1_CH2, TSC_G5_IO2, OCTOSPI1_NCS and FMC_D8."
      },
      {
        "number": "62",
        "name": "PE12",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate functions TIM1_CH3N, SPI1_NSS, TSC_G5_IO3, OCTOSPI1_IO0 and FMC_D9."
      },
      {
        "number": "63",
        "name": "PE13",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate functions TIM1_CH3, SPI1_SCK, TSC_G5_IO4, OCTOSPI1_IO1 and FMC_D10."
      },
      {
        "number": "64",
        "name": "PE14",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate functions TIM1_CH4, TIM1_BKIN2, SPI1_MISO, OCTOSPI1_IO2 and FMC_D11."
      },
      {
        "number": "65",
        "name": "PE15",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate functions TIM1_BKIN, SPI1_MOSI, OCTOSPI1_IO3 and FMC_D12."
      },
      {
        "number": "66",
        "name": "PB10",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with Fm+ capability (FT_f); alternate functions TIM2_CH3, LPTIM3_OUT, I2C4_SCL, I2C2_SCL, SPI2_SCK, USART3_TX, LPUART1_RX, TSC_SYNC, OCTOSPI1_CLK, COMP1_OUT and SAI1_SCK_A."
      },
      {
        "number": "67",
        "name": "PB11",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with Fm+ capability (FT_f); alternate functions TIM2_CH4, I2C4_SDA, I2C2_SDA, USART3_RX, LPUART1_TX, OCTOSPI1_NCS, COMP2_OUT and EVENTOUT."
      },
      {
        "number": "68",
        "name": "VDDSMPS",
        "type": "power_in",
        "description": "Supply for the internal SMPS step-down converter, 1.71 V to 3.6 V, to be connected to the same supply as VDD."
      },
      {
        "number": "69",
        "name": "VLXSMPS",
        "type": "power_out",
        "description": "Switched output of the SMPS step-down converter, connected to the external 4.7 µH (typ.) inductor."
      },
      {
        "number": "70",
        "name": "VSSSMPS",
        "type": "power_in",
        "description": "Ground pin for the SMPS step-down converter."
      },
      {
        "number": "71",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground pin for the digital supply domain."
      },
      {
        "number": "72",
        "name": "V15SMPS_1",
        "type": "power_in",
        "description": "Power supply for the system regulator, provided externally through the SMPS VLXSMPS output (1.5 V range nominal per Table 29)."
      },
      {
        "number": "73",
        "name": "VDD",
        "type": "power_in",
        "description": "Main supply for I/Os, the internal regulator and system analog blocks, 1.71 V to 3.6 V."
      },
      {
        "number": "74",
        "name": "PB13",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with Fm+ capability (FT_f); alternate functions TIM1_CH1N, LPTIM3_IN1, I2C2_SCL, SPI2_SCK, DFSDM1_CKIN1, USART3_CTS/USART3_NSS, LPUART1_CTS, TSC_G1_IO2, UCPD1_FRSTX2, SAI2_SCK_A and TIM15_CH1N."
      },
      {
        "number": "75",
        "name": "PB14",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with Fm+ capability and dead-battery function (FT_fd); alternate functions TIM1_CH2N, LPTIM3_ETR, TIM8_CH2N, I2C2_SDA, SPI2_MISO, DFSDM1_DATIN2, USART3_RTS/USART3_DE and TIM15_CH1; additional function UCPD1_DB2."
      },
      {
        "number": "76",
        "name": "PB15",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with USB Type-C PD capability (FT_c); alternate functions RTC_REFIN, TIM1_CH3N, TIM8_CH3N, SPI2_MOSI, DFSDM1_CKIN2, SAI2_SD_A and TIM15_CH2; additional function UCPD1_CC2."
      },
      {
        "number": "77",
        "name": "PD8",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate functions USART3_TX, FMC_D13 and EVENTOUT."
      },
      {
        "number": "78",
        "name": "PD9",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate functions USART3_RX, FMC_D14, SAI2_MCLK_A and EVENTOUT."
      },
      {
        "number": "79",
        "name": "PD10",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate functions USART3_CK, TSC_G6_IO1, FMC_D15, SAI2_SCK_A and EVENTOUT."
      },
      {
        "number": "80",
        "name": "PD11",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate functions I2C4_SMBA, USART3_CTS/USART3_NSS, TSC_G6_IO2, FMC_A16, SAI2_SD_A and LPTIM2_ETR."
      },
      {
        "number": "81",
        "name": "PD12",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with Fm+ capability (FT_f); alternate functions TIM4_CH1, I2C4_SCL, USART3_RTS/USART3_DE, TSC_G6_IO3, FMC_A17, SAI2_FS_A and LPTIM2_IN1."
      },
      {
        "number": "82",
        "name": "PD13",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with Fm+ capability (FT_f); alternate functions TIM4_CH2, I2C4_SDA, TSC_G6_IO4, FMC_A18 and LPTIM2_OUT."
      },
      {
        "number": "83",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground pin for the digital supply domain."
      },
      {
        "number": "84",
        "name": "VDD",
        "type": "power_in",
        "description": "Main supply for I/Os, the internal regulator and system analog blocks, 1.71 V to 3.6 V."
      },
      {
        "number": "85",
        "name": "PD14",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate functions TIM4_CH3, FMC_D0 and EVENTOUT."
      },
      {
        "number": "86",
        "name": "PD15",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate functions TIM4_CH4, FMC_D1 and EVENTOUT."
      },
      {
        "number": "87",
        "name": "PG2",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O supplied only by VDDIO2 (FT_s); alternate functions SPI1_SCK, FMC_A12, SAI2_SCK_B and EVENTOUT."
      },
      {
        "number": "88",
        "name": "PG3",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O supplied only by VDDIO2 (FT_s); alternate functions SPI1_MISO, FMC_A13, SAI2_FS_B and EVENTOUT."
      },
      {
        "number": "89",
        "name": "PG4",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O supplied only by VDDIO2 (FT_s); alternate functions SPI1_MOSI, FMC_A14, SAI2_MCLK_B and EVENTOUT."
      },
      {
        "number": "90",
        "name": "PG5",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O supplied only by VDDIO2 (FT_s); alternate functions SPI1_NSS, LPUART1_CTS, FMC_A15, SAI2_SD_B and EVENTOUT."
      },
      {
        "number": "91",
        "name": "PG6",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O supplied only by VDDIO2 (FT_s); alternate functions OCTOSPI1_DQS, I2C3_SMBA, LPUART1_RTS/LPUART1_DE, UCPD1_FRSTX1 and EVENTOUT."
      },
      {
        "number": "92",
        "name": "PG7",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with Fm+ capability, supplied only by VDDIO2 (FT_fs); alternate functions SAI1_CK1, I2C3_SCL, DFSDM1_CKOUT, LPUART1_TX, UCPD1_FRSTX2, FMC_INT and SAI1_MCLK_A."
      },
      {
        "number": "93",
        "name": "PG8",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with Fm+ capability, supplied only by VDDIO2 (FT_fs); alternate functions I2C3_SDA, LPUART1_RX and EVENTOUT."
      },
      {
        "number": "94",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground pin for the digital supply domain."
      },
      {
        "number": "95",
        "name": "VDDIO2",
        "type": "power_in",
        "description": "Supply for the 14 I/Os of port PG[15:2], 1.08 V to 3.6 V when at least one of them is used."
      },
      {
        "number": "96",
        "name": "PC6",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate functions TIM3_CH1, TIM8_CH1, DFSDM1_CKIN3, SDMMC1_D0DIR, TSC_G4_IO1, SDMMC1_D6 and SAI2_MCLK_A."
      },
      {
        "number": "97",
        "name": "PC7",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate functions TIM3_CH2, TIM8_CH2, DFSDM1_DATIN3, SDMMC1_D123DIR, TSC_G4_IO2, SDMMC1_D7 and SAI2_MCLK_B."
      },
      {
        "number": "98",
        "name": "PC8",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate functions TIM3_CH3, TIM8_CH3, TSC_G4_IO3 and SDMMC1_D0."
      },
      {
        "number": "99",
        "name": "PC9",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with Fm+ capability (FT_f); alternate functions TRACED0, TIM8_BKIN2, TIM3_CH4, TIM8_CH4, TSC_G4_IO4, USB_NOE, SDMMC1_D1 and SAI2_EXTCLK."
      },
      {
        "number": "100",
        "name": "PA8",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with Fm+ capability (FT_f); alternate functions MCO, TIM1_CH1, SAI1_CK2, USART1_CK, SAI1_SCK_A and LPTIM2_OUT."
      },
      {
        "number": "101",
        "name": "PA9",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with Fm+ capability and USB function supplied by VDDUSB (FT_fu); alternate functions TIM1_CH2, SPI2_SCK, USART1_TX, SAI1_FS_A and TIM15_BKIN."
      },
      {
        "number": "102",
        "name": "PA10",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with Fm+ capability and USB function supplied by VDDUSB (FT_fu); alternate functions TIM1_CH3, SAI1_D1, USART1_RX, CRS_SYNC, SAI1_SD_A and TIM17_BKIN."
      },
      {
        "number": "103",
        "name": "PA11",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with USB function supplied by VDDUSB (FT_u); alternate functions TIM1_CH4, TIM1_BKIN2, SPI1_MISO, USART1_CTS/USART1_NSS, FDCAN1_RX and USB_DM."
      },
      {
        "number": "104",
        "name": "PA12",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with USB function supplied by VDDUSB (FT_u); alternate functions TIM1_ETR, SPI1_MOSI, USART1_RTS/USART1_DE, FDCAN1_TX and USB_DP."
      },
      {
        "number": "105",
        "name": "PA13",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; after reset it is the JTMS/SWDIO debug function with internal pull-up enabled; alternate functions IR_OUT, USB_NOE, SAI1_SD_B and EVENTOUT."
      },
      {
        "number": "106",
        "name": "VDDUSB",
        "type": "power_in",
        "description": "Independent supply for the USB transceivers, 3.0 V to 3.6 V when USB is used."
      },
      {
        "number": "107",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground pin for the digital supply domain."
      },
      {
        "number": "108",
        "name": "VDD",
        "type": "power_in",
        "description": "Main supply for I/Os, the internal regulator and system analog blocks, 1.71 V to 3.6 V."
      },
      {
        "number": "109",
        "name": "PA14",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; after reset it is the JTCK/SWCLK debug function with internal pull-down enabled; alternate functions LPTIM1_OUT, I2C1_SMBA, I2C4_SMBA and SAI1_FS_B."
      },
      {
        "number": "110",
        "name": "PA15",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with USB Type-C PD capability (FT_c); after reset it is the JTDI debug function with internal pull-up enabled; alternate functions TIM2_CH1, TIM2_ETR, USART2_RX, SPI1_NSS, SPI3_NSS and SAI2_FS_B; additional function UCPD1_CC1."
      },
      {
        "number": "111",
        "name": "PC10",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate functions TRACED1, LPTIM3_ETR, SPI3_SCK, USART3_TX, UART4_TX, TSC_G3_IO2, SDMMC1_D2 and SAI2_SCK_B."
      },
      {
        "number": "112",
        "name": "PC11",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate functions LPTIM3_IN1, OCTOSPI1_NCS, SPI3_MISO, USART3_RX, UART4_RX, TSC_G3_IO3, UCPD1_FRSTX2, SDMMC1_D3 and SAI2_MCLK_B."
      },
      {
        "number": "113",
        "name": "PC12",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate functions TRACED3, SPI3_MOSI, USART3_CK, UART5_TX, TSC_G3_IO4, SDMMC1_CK and SAI2_SD_B."
      },
      {
        "number": "114",
        "name": "PD0",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate functions SPI2_NSS, FDCAN1_RX, FMC_D2 and EVENTOUT."
      },
      {
        "number": "115",
        "name": "PD1",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate functions SPI2_SCK, FDCAN1_TX, FMC_D3 and EVENTOUT."
      },
      {
        "number": "116",
        "name": "PD2",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate functions TRACED2, TIM3_ETR, USART3_RTS/USART3_DE, UART5_RX, TSC_SYNC, SDMMC1_CMD and EVENTOUT."
      },
      {
        "number": "117",
        "name": "PD3",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate functions SPI2_SCK, SPI2_MISO, DFSDM1_DATIN0, USART2_CTS/USART2_NSS and FMC_CLK."
      },
      {
        "number": "118",
        "name": "PD4",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate functions SPI2_MOSI, DFSDM1_CKIN0, USART2_RTS/USART2_DE, OCTOSPI1_IO4 and FMC_NOE."
      },
      {
        "number": "119",
        "name": "PD5",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate functions USART2_TX, OCTOSPI1_IO5, FMC_NWE and EVENTOUT."
      },
      {
        "number": "120",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground pin for the digital supply domain."
      },
      {
        "number": "121",
        "name": "VDD",
        "type": "power_in",
        "description": "Main supply for I/Os, the internal regulator and system analog blocks, 1.71 V to 3.6 V."
      },
      {
        "number": "122",
        "name": "PD6",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate functions SAI1_D1, SPI3_MOSI, DFSDM1_DATIN1, USART2_RX, OCTOSPI1_IO6, FMC_NWAIT and SAI1_SD_A."
      },
      {
        "number": "123",
        "name": "PD7",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate functions DFSDM1_CKIN1, USART2_CK, OCTOSPI1_IO7 and FMC_NCE/FMC_NE1."
      },
      {
        "number": "124",
        "name": "PG9",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O supplied only by VDDIO2 (FT_s); alternate functions SPI3_SCK, USART1_TX, FMC_NCE/FMC_NE2, SAI2_SCK_A and TIM15_CH1N."
      },
      {
        "number": "125",
        "name": "PG10",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O supplied only by VDDIO2 (FT_s); alternate functions LPTIM1_IN1, SPI3_MISO, USART1_RX, FMC_NE3, SAI2_FS_A and TIM15_CH1."
      },
      {
        "number": "126",
        "name": "PG12",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O supplied only by VDDIO2 (FT_s); alternate functions LPTIM1_ETR, SPI3_NSS, USART1_RTS/USART1_DE, FMC_NE4 and SAI2_SD_A."
      },
      {
        "number": "127",
        "name": "PG13",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with Fm+ capability, supplied only by VDDIO2 (FT_fs); alternate functions I2C1_SDA, USART1_CK and FMC_A24."
      },
      {
        "number": "128",
        "name": "PG14",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with Fm+ capability, supplied only by VDDIO2 (FT_fs); alternate functions I2C1_SCL and FMC_A25."
      },
      {
        "number": "129",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground pin for the digital supply domain."
      },
      {
        "number": "130",
        "name": "VDDIO2",
        "type": "power_in",
        "description": "Supply for the 14 I/Os of port PG[15:2], 1.08 V to 3.6 V when at least one of them is used."
      },
      {
        "number": "131",
        "name": "PG15",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O supplied only by VDDIO2 (FT_s); alternate functions LPTIM1_OUT, I2C1_SMBA and EVENTOUT."
      },
      {
        "number": "132",
        "name": "PB3",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with analog switch (FT_a); after reset it is the JTDO/TRACESWO debug function; alternate functions TIM2_CH2, SPI1_SCK, SPI3_SCK, USART1_RTS/USART1_DE, CRS_SYNC and SAI1_SCK_B; additional function COMP2_INM."
      },
      {
        "number": "133",
        "name": "PB4",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with Fm+ capability and analog switch (FT_fa); after reset it is the NJTRST debug function with internal pull-up enabled; alternate functions TIM3_CH1, I2C3_SDA, SPI1_MISO, SPI3_MISO, USART1_CTS/USART1_NSS, UART5_RTS/UART5_DE, TSC_G2_IO1, SAI1_MCLK_B and TIM17_BKIN; additional function COMP2_INP."
      },
      {
        "number": "134",
        "name": "PB5",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with dead-battery function (FT_d); alternate functions LPTIM1_IN1, TIM3_CH2, OCTOSPI1_NCLK, I2C1_SMBA, SPI1_MOSI, SPI3_MOSI, USART1_CK, UART5_CTS/UART5_NSS, TSC_G2_IO2, COMP2_OUT, SAI1_SD_B and TIM16_BKIN; additional function UCPD1_DB1."
      },
      {
        "number": "135",
        "name": "PB6",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with Fm+ capability and analog switch (FT_fa); alternate functions LPTIM1_ETR, TIM4_CH1, TIM8_BKIN2, I2C1_SCL, I2C4_SCL, USART1_TX, TSC_G2_IO3, SAI1_FS_B and TIM16_CH1N; additional function COMP2_INP."
      },
      {
        "number": "136",
        "name": "PB7",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with Fm+ capability and analog switch (FT_fa); alternate functions LPTIM1_IN2, TIM4_CH2, TIM8_BKIN, I2C1_SDA, I2C4_SDA, USART1_RX, UART4_CTS, TSC_G2_IO4, FMC_NL and TIM17_CH1N; additional functions COMP2_INM and PVD_IN."
      },
      {
        "number": "137",
        "name": "PH3-BOOT0",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O on the dedicated BOOT0 pin; additional function EVENTOUT per the pin definition table."
      },
      {
        "number": "138",
        "name": "PB8",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with Fm+ capability (FT_f); alternate functions TIM4_CH3, SAI1_CK1, I2C1_SCL, DFSDM1_CKOUT, SDMMC1_CKIN, FDCAN1_RX, SDMMC1_D4, SAI1_MCLK_A and TIM16_CH1."
      },
      {
        "number": "139",
        "name": "PB9",
        "type": "bidirectional",
        "description": "5 V-tolerant I/O with Fm+ capability (FT_f); alternate functions IR_OUT, TIM4_CH4, SAI1_D2, I2C1_SDA, SPI2_NSS, SDMMC1_CDIR, FDCAN1_TX, SDMMC1_D5, SAI1_FS_A and TIM17_CH1."
      },
      {
        "number": "140",
        "name": "PE0",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate functions TIM4_ETR, FMC_NBL0 and TIM16_CH1."
      },
      {
        "number": "141",
        "name": "PE1",
        "type": "bidirectional",
        "description": "5 V-tolerant (FT) I/O; alternate functions FMC_NBL1 and TIM17_CH1."
      },
      {
        "number": "142",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground pin for the digital supply domain."
      },
      {
        "number": "143",
        "name": "V15SMPS_2",
        "type": "power_in",
        "description": "Second power supply pin for the system regulator, provided externally through the SMPS VLXSMPS output."
      },
      {
        "number": "144",
        "name": "VDD",
        "type": "power_in",
        "description": "Main supply for I/Os, the internal regulator and system analog blocks, 1.71 V to 3.6 V."
      }
    ],
    "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: Variant selection: MPN STM32L552ZCT6Q decodes as 144 pins (Z), 256 KB Flash (C), LQFP (T), 6 = -40 t; Table 21 is text-extracted from a PDF with column alignment that had to be reconstructed. Every pin ; Four standard LQFP144 pins are not bonded in the SMPS variant (shown as '-' in the LQFP144_SMPS colu"
        ],
        "pages_sent": 120,
        "cost_usd": 0.6209,
        "at": "2026-10-08T21:47:44"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588940358961008640",
        "pages": 340,
        "sha256": "b15b1557a4a6a6d9",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 144,
        "described": 144,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "stm32l552zct6q.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          22.0,
          22.0,
          1.5
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "b4d698da8bb7697b754adb5655c932342462d9b9341cdaa081b3604dbdf7559b",
        "checked": "2026-10-08",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "stm32l552zct6q-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          22.0,
          22.0,
          1.5
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "4e5676683e609c8398cf0dd71b7acf124d38a7dffb0baa3a90b004f120166e45",
        "checked": "2026-10-08",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}