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STM32G431CBU6

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by adom

STMicroelectronics Microcontrollers (MCU/MPU/SOC), UFQFPN-48(7x7). Pinout checked against ST's open pin data, KiCad symbol/footprint/3D.

componentembedded processors & controllersstm32g431cbu6factory-2.0.0extractor-text
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STM32G431CBU6

STMicroelectronics · Microcontrollers (MCU/MPU/SOC) · UFQFPN-48(7x7)

STM32G431CBU6 from STMicroelectronics, in a UFQFPN-48(7x7). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model, then checked against ST open pin data); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 VBAT power_in Backup domain supply voltage for RTC and backup registers, 1.55 V to 3.6 V
2 PC13 bidirectional GPIO Port C bit 13, 5V tolerant, alternate functions include TIM1_BKIN, TIM1_CH1N, TIM8_CH4N, additional functions WKUP2, RTC_TAMP1, RTC_TS, RTC_OUT1
3 PC14-OSC32_IN bidirectional GPIO Port C bit 14 or 32 kHz oscillator input, 5V tolerant, alternate function EVENTOUT, additional function OSC32_IN
4 PC15-OSC32_OUT bidirectional GPIO Port C bit 15 or 32 kHz oscillator output, 5V tolerant, alternate function EVENTOUT, additional function OSC32_OUT
5 PF0-OSC_IN input GPIO Port F bit 0 or main oscillator input, 5V tolerant Fm+ capable, with I2C2_SDA and SPI2_NSS alternate functions and ADC1_IN10, OSC_IN additional functions
6 PF1-OSC_OUT output GPIO Port F bit 1 or main oscillator output, 5V tolerant with analog switch, alternate function SPI2_SCK/I2S2_CK, additional functions ADC2_IN10, COMP3_INM, OSC_OUT
7 PG10-NRST bidirectional Reset pin with embedded weak pull-up, alternate functions MCO and EVENTOUT
8 PA0 bidirectional GPIO Port A bit 0, 3.3V tolerant with analog switch, alternate functions TIM2_CH1, USART2_CTS, COMP1_OUT, TIM8_BKIN, additional functions ADC12_IN1, COMP1_INM, COMP3_INP, RTC_TAMP2, WKUP1
9 PA1 bidirectional GPIO Port A bit 1, 3.3V tolerant with analog switch, alternate functions RTC_REFIN, TIM2_CH2, USART2_RTS_DE, TIM15_CH1N, additional functions ADC12_IN2, COMP1_INP, OPAMP1_VINP, OPAMP3_VINP
10 PA2 bidirectional GPIO Port A bit 2, 3.3V tolerant with analog switch, alternate functions TIM2_CH3, USART2_TX, COMP2_OUT, TIM15_CH1, UCPD1_FRSTX, additional functions ADC1_IN3, COMP2_INM, OPAMP1_VOUT, WKUP4/LSCO
11 PA3 bidirectional GPIO Port A bit 3, 3.3V tolerant with analog switch, alternate functions TIM2_CH4, SAI1_CK1, USART2_RX, TIM15_CH2, LPUART1_RX, additional functions ADC1_IN4, COMP2_INP, OPAMP1_VINM/OPAMP1_VINP
12 PA4 bidirectional GPIO Port A bit 4, 3.3V tolerant with analog switch, alternate functions TIM3_CH2, SPI1_NSS, SPI3_NSS/I2S3_WS, USART2_CK, additional functions ADC2_IN17, DAC1_OUT1, COMP1_INM
13 PA5 bidirectional GPIO Port A bit 5, 3.3V tolerant with analog switch, alternate functions TIM2_CH1, TIM2_ETR, SPI1_SCK, UCPD1_FRSTX, additional functions ADC2_IN13, DAC1_OUT2, COMP2_INM, OPAMP2_VINM
14 PA6 bidirectional GPIO Port A bit 6, 3.3V tolerant with analog switch, alternate functions TIM16_CH1, TIM3_CH1, TIM8_BKIN, SPI1_MISO, TIM1_BKIN, COMP1_OUT, additional functions ADC2_IN3, OPAMP2_VOUT
15 PA7 bidirectional GPIO Port A bit 7, 3.3V tolerant with analog switch, alternate functions TIM17_CH1, TIM3_CH2, TIM8_CH1N, SPI1_MOSI, TIM1_CH1N, COMP2_OUT, additional functions ADC2_IN4, COMP2_INP, OPAMP1_VINP, OPAMP2_VINP
16 PC4 bidirectional GPIO Port C bit 4, 5V tolerant Fm+ capable, alternate functions TIM1_ETR, I2C2_SCL, USART1_TX, additional function ADC2_IN5
17 PB0 bidirectional GPIO Port B bit 0, 3.3V tolerant with analog switch, alternate functions TIM3_CH3, TIM8_CH2N, TIM1_CH2N, UCPD1_FRSTX, additional functions ADC1_IN15, COMP4_INP, OPAMP2_VINP, OPAMP3_VINP
18 PB1 bidirectional GPIO Port B bit 1, 3.3V tolerant with analog switch, alternate functions TIM3_CH4, TIM8_CH3N, TIM1_CH3N, COMP4_OUT, LPUART1_RTS_DE, additional functions ADC1_IN12, COMP1_INP, OPAMP3_VOUT
19 PB2 bidirectional GPIO Port B bit 2, 3.3V tolerant with analog switch, alternate functions RTC_OUT2, LPTIM1_OUT, I2C3_SMBA, additional functions ADC2_IN12, COMP4_INM, OPAMP3_VINM
20 VREF+ power_in Positive reference voltage for ADC, 2.4 V to 3.6 V, can be connected to VREFBUF_OUT
21 VDDA power_in Analog supply voltage for ADC, comparators, and OPAMP, 1.62 V to 3.6 V when ADC used, 1.71 V to 3.6 V when DAC used, 2.0 V to 3.6 V when OPAMP used
22 PB10 bidirectional GPIO Port B bit 10, 3.3V tolerant with analog switch, alternate functions TIM2_CH3, USART3_TX, LPUART1_RX, TIM1_BKIN, SAI1_SCK_A, additional function OPAMP3_VINM
23 VDD power_in Main supply voltage, 1.71 V to 3.6 V
24 PB11 bidirectional GPIO Port B bit 11, 5V tolerant with analog switch, alternate functions TIM2_CH4, USART3_RX, LPUART1_TX, additional function ADC12_IN14
25 PB12 bidirectional GPIO Port B bit 12, 5V tolerant with analog switch, alternate functions I2C2_SMBA, SPI2_NSS/I2S2_WS, TIM1_BKIN, USART3_CK, LPUART1_RTS_DE, additional function ADC1_IN11
26 PB13 bidirectional GPIO Port B bit 13, 3.3V tolerant, alternate functions SPI2_SCK/I2S2_CK, TIM1_CH1N, USART3_CTS, LPUART1_CTS, additional function OPAMP3_VINP
27 PB14 bidirectional GPIO Port B bit 14, 3.3V tolerant, alternate functions TIM15_CH1, SPI2_MISO, TIM1_CH2N, USART3_RTS_DE, COMP4_OUT, additional functions ADC1_IN5, OPAMP2_VINP
28 PB15 bidirectional GPIO Port B bit 15, 5V tolerant with analog switch, alternate functions RTC_REFIN, TIM15_CH2, TIM15_CH1N, COMP3_OUT, TIM1_CH3N, SPI2_MOSI/I2S2_SD, additional function ADC2_IN15
29 PC6 bidirectional GPIO Port C bit 6, 5V tolerant, alternate functions TIM3_CH1, TIM8_CH1, I2S2_MCK
30 PA8 bidirectional GPIO Port A bit 8, 5V tolerant Fm+ capable, alternate functions MCO, I2C3_SCL, I2C2_SDA, I2S2_MCK, TIM1_CH1, USART1_CK, TIM4_ETR, SAI1_CK2, SAI1_SCK_A
31 PA9 bidirectional GPIO Port A bit 9, 5V tolerant USB Type-C PD capable Dead Battery function, alternate functions I2C3_SMBA, I2C2_SCL, I2S3_MCK, TIM1_CH2, USART1_TX, TIM15_BKIN, TIM2_CH3, SAI1_FS_A, additional function UCPD1_DBCC1
32 PA10 bidirectional GPIO Port A bit 10, 5V tolerant USB Type-C PD Dead Battery function, alternate functions TIM17_BKIN, USB_CRS_SYNC, I2C2_SMBA, SPI2_MISO, TIM1_CH3, USART1_RX, TIM2_CH4, TIM8_BKIN, SAI1_D1, additional function UCPD1_DBCC2
33 PA11 bidirectional GPIO Port A bit 11, 5V tolerant USB capable, alternate functions SPI2_MOSI/I2S2_SD, TIM1_CH1N, USART1_CTS, COMP1_OUT, FDCAN1_RX, TIM4_CH1, TIM1_CH4, TIM1_BKIN2, additional function USB_DM
34 PA12 bidirectional GPIO Port A bit 12, 5V tolerant USB capable, alternate functions TIM16_CH1, I2SCKIN, TIM1_CH2N, USART1_RTS_DE, COMP2_OUT, FDCAN1_TX, TIM4_CH2, TIM1_ETR, additional function USB_DP
35 VDD power_in Main supply voltage, 1.71 V to 3.6 V
36 PA13 bidirectional GPIO Port A bit 13, 5V tolerant Fm+ capable, alternate functions SWDIO-JTMS, TIM16_CH1N, I2C1_SCL, IR_OUT, USART3_CTS, TIM4_CH3, SAI1_SD_B, internal pull-up activated after reset
37 PA14 bidirectional GPIO Port A bit 14, 5V tolerant Fm+ capable, alternate functions SWCLK-JTCK, LPTIM1_OUT, I2C1_SDA, TIM8_CH2, TIM1_BKIN, USART2_TX, SAI1_FS_B, internal pull-down activated after reset
38 PA15 bidirectional GPIO Port A bit 15, 5V tolerant Fm+ capable, alternate functions JTDI, TIM2_CH1, TIM8_CH1, I2C1_SCL, SPI1_NSS, SPI3_NSS/I2S3_WS, USART2_RX, UART4_RTS_DE, internal pull-up activated after reset
39 PC10 bidirectional GPIO Port C bit 10, 5V tolerant, alternate functions TIM8_CH1N, UART4_TX, SPI3_SCK/I2S3_CK, USART3_TX
40 PC11 bidirectional GPIO Port C bit 11, 5V tolerant Fm+ capable, alternate functions TIM8_CH2N, UART4_RX, SPI3_MISO, USART3_RX, I2C3_SDA
41 PB3 bidirectional GPIO Port B bit 3, 5V tolerant, alternate functions JTDO-TRACESWO, TIM2_CH2, TIM4_ETR, USB_CRS_SYNC, TIM8_CH1N, SPI1_SCK, SPI3_SCK/I2S3_CK, USART2_TX, internal pull-up activated after reset
42 PB4 bidirectional GPIO Port B bit 4, 5V tolerant USB Type-C PD CC2 capable, alternate functions JTRST, TIM16_CH1, TIM3_CH1, TIM8_CH2N, SPI1_MISO, SPI3_MISO, USART2_RX, TIM17_BKIN, internal pull-up/down after reset
43 PB5 bidirectional GPIO Port B bit 5, 5V tolerant Fm+ capable, alternate functions TIM16_BKIN, TIM3_CH2, TIM8_CH3N, I2C1_SMBA, SPI1_MOSI, SPI3_MOSI/I2S3_SD, USART2_CK, I2C3_SDA, TIM17_CH1, LPTIM1_IN1, SAI1_SD_B
44 PB6 bidirectional GPIO Port B bit 6, 5V tolerant USB Type-C PD CC1 capable, alternate functions TIM16_CH1N, TIM4_CH1, TIM8_CH1, TIM8_ETR, USART1_TX, COMP4_OUT, TIM8_BKIN2, LPTIM1_ETR, SAI1_FS_B
45 PB7 bidirectional GPIO Port B bit 7, 5V tolerant Fm+ capable, alternate functions TIM17_CH1N, TIM4_CH2, I2C1_SDA, TIM8_BKIN, USART1_RX, COMP3_OUT, TIM3_CH4, LPTIM1_IN2, UART4_CTS, additional function PVD_IN
46 PB8-BOOT0 bidirectional GPIO Port B bit 8 or boot pin, 5V tolerant Fm+ capable, alternate functions TIM16_CH1, TIM4_CH3, SAI1_CK1, I2C1_SCL, USART3_RX, COMP1_OUT, FDCAN1_RX, TIM8_CH2, TIM1_BKIN, SAI1_MCLK_A
47 PB9 bidirectional GPIO Port B bit 9, 5V tolerant Fm+ capable, alternate functions TIM17_CH1, TIM4_CH4, SAI1_D2, I2C1_SDA, IR_OUT, USART3_TX, COMP2_OUT, FDCAN1_TX, TIM8_CH3, TIM1_CH3N, SAI1_FS_A
48 VDD power_in Main supply voltage, 1.71 V to 3.6 V
49 EP passive Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter Value
Manufacturer STMicroelectronics
Package UFQFPN-48(7x7)
Category Embedded Processors & Controllers
Pins 49

CAD (KiCad official)

  • Symbol: STM32G431CBU6
  • Footprint: Package_DFN_QFN:QFN-48-1EP_7x7mm_P0.5mm_EP5.15x5.15mm
  • 3D model: UFQFPN-48(7x7) (KiCad packages3D, STEP)
  • 3D model files: stm32g431cbu6-etched.step / stm32g431cbu6-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); stm32g431cbu6.step / stm32g431cbu6.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: STMicroelectronics datasheet (200 pp, sha256 cabefb21b47dc4c1, retrieved 2026-10-03, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-4-5-20251001 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF