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STM32G081CBT6

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

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STM32G081CBT6

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

STM32G081CBT6 from STMicroelectronics, in a LQFP-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 PC13 bidirectional 5 V-tolerant I/O (FT) on the power-switch domain, which sinks only 3 mA, so output use is limited to 2 MHz with 30 pF load and it must not source current such as an LED; alternate function TIM1_BKIN, additional functions TAMP_IN1, RTC_TS, RTC_OUT1, WKUP2.
2 PC14-OSC32_IN bidirectional 5 V-tolerant I/O (FT) on the power-switch domain with the same 3 mA limit as PC13; alternate function TIM1_BKIN2, additional function OSC32_IN (32.768 kHz LSE oscillator input).
3 PC15-OSC32_OUT bidirectional 5 V-tolerant I/O (FT) on the power-switch domain with the same 3 mA limit as PC13; alternate functions OSC32_EN, OSC_EN, TIM15_BKIN, additional function OSC32_OUT (32.768 kHz LSE oscillator output).
4 VBAT power_in Backup supply input from 1.55 V to 3.6 V that powers the RTC, TAMP, the 32.768 kHz oscillator and backup registers when VDD is not present.
5 VREF+ power_in Analog reference input, or output of the internal voltage reference buffer when enabled; it must equal VDDA when VDDA < 2 V and be between 2 V and VDDA when VDDA ≥ 2 V.
6 VDD/VDDA power_in Main supply input from 1.7 V to 3.6 V for the internal regulator, I/O ring and analog blocks, with minimum 1.62 V for ADC/COMP, 1.8 V for DAC and 2.4 V for VREFBUF operation.
7 VSS/VSSA power_in Ground reference for the digital and analog supplies; all voltages are referenced to VSS.
8 PF0-OSC_IN bidirectional 5 V-tolerant I/O (FT) with alternate function TIM14_CH1 and additional function OSC_IN (high-speed crystal input).
9 PF1-OSC_OUT bidirectional 5 V-tolerant I/O (FT) with alternate functions OSC_EN and TIM15_CH1N and additional function OSC_OUT (high-speed crystal output).
10 PF2-NRST bidirectional Bidirectional reset pin with embedded weak pull-up resistor; it is also a 5 V-tolerant I/O (FT) with alternate function MCO.
11 PA0 bidirectional 5 V-tolerant I/O with analog switch function (FT_a); alternate functions include SPI2_SCK, USART2_CTS, TIM2_CH1_ETR, USART4_TX, LPTIM1_OUT, UCPD2_FRSTX and COMP1_OUT, additional functions COMP1_INM, ADC_IN0, TAMP_IN2 and WKUP1.
12 PA1 bidirectional 5 V-tolerant I/O with analog switch function (FT_a); alternate functions include SPI1_SCK/I2S1_CK, USART2_RTS_DE_CK, TIM2_CH2, USART4_RX, TIM15_CH1N, I2C1_SMBA and EVENTOUT, additional functions COMP1_INP and ADC_IN1.
13 PA2 bidirectional 5 V-tolerant I/O with analog switch function (FT_a); alternate functions include SPI1_MOSI/I2S1_SD, USART2_TX, TIM2_CH3, UCPD1_FRSTX, TIM15_CH1, LPUART1_TX and COMP2_OUT, additional functions COMP2_INM, ADC_IN2, WKUP4 and LSCO.
14 PA3 bidirectional 5 V-tolerant I/O with analog switch function (FT_a); alternate functions include SPI2_MISO, USART2_RX, TIM2_CH4, UCPD2_FRSTX, TIM15_CH2, LPUART1_RX and EVENTOUT, additional functions COMP2_INP and ADC_IN3.
15 PA4 bidirectional 3.6 V-tolerant I/O with analog switch function (TT_a); alternate functions include SPI1_NSS/I2S1_WS, SPI2_MOSI, TIM14_CH1, LPTIM2_OUT, UCPD2_FRSTX and EVENTOUT, additional functions ADC_IN4, DAC_OUT1 and RTC_OUT2.
16 PA5 bidirectional 3.6 V-tolerant I/O with analog switch function (TT_a); alternate functions include SPI1_SCK/I2S1_CK, CEC, TIM2_CH1_ETR, USART3_TX, LPTIM2_ETR, UCPD1_FRSTX and EVENTOUT, additional functions ADC_IN5 and DAC_OUT2.
17 PA6 bidirectional 5 V-tolerant I/O with analog switch function (FT_a); alternate functions include SPI1_MISO/I2S1_MCK, TIM3_CH1, TIM1_BKIN, USART3_CTS, TIM16_CH1, LPUART1_CTS and COMP1_OUT, additional function ADC_IN6.
18 PA7 bidirectional 5 V-tolerant I/O with analog switch function (FT_a); alternate functions include SPI1_MOSI/I2S1_SD, TIM3_CH2, TIM1_CH1N, TIM14_CH1, TIM17_CH1, UCPD1_FRSTX and COMP2_OUT, additional function ADC_IN7.
19 PB0 bidirectional 5 V-tolerant I/O with analog switch function (FT_a); alternate functions include SPI1_NSS/I2S1_WS, TIM3_CH3, TIM1_CH2N, USART3_RX, LPTIM1_OUT, UCPD1_FRSTX and COMP1_OUT, additional function ADC_IN8.
20 PB1 bidirectional 5 V-tolerant I/O with analog switch function (FT_a); alternate functions include TIM14_CH1, TIM3_CH4, TIM1_CH3N, USART3_RTS_DE_CK, LPTIM2_IN1, LPUART1_RTS_DE and EVENTOUT, additional functions COMP1_INM and ADC_IN9.
21 PB2 bidirectional 5 V-tolerant I/O with analog switch function (FT_a); alternate functions include SPI2_MISO, USART3_TX, LPTIM1_OUT and EVENTOUT, additional functions COMP1_INP and ADC_IN10.
22 PB10 bidirectional 5 V-tolerant I/O with analog switch and Fm+ capability (FT_fa); alternate functions include CEC, LPUART1_RX, TIM2_CH3, USART3_TX, SPI2_SCK, I2C2_SCL and COMP1_OUT, additional function ADC_IN11.
23 PB11 bidirectional 5 V-tolerant I/O with analog switch and Fm+ capability (FT_fa); alternate functions include SPI2_MOSI, LPUART1_TX, TIM2_CH4, USART3_RX, I2C2_SDA and COMP2_OUT, additional function ADC_IN15.
24 PB12 bidirectional 5 V-tolerant I/O with analog switch function (FT_a); alternate functions include SPI2_NSS, LPUART1_RTS_DE, TIM1_BKIN, TIM15_BKIN, UCPD2_FRSTX and EVENTOUT, additional function ADC_IN16.
25 PB13 bidirectional 5 V-tolerant Fm+ capable I/O (FT_f); alternate functions include SPI2_SCK, LPUART1_CTS, TIM1_CH1N, USART3_CTS, TIM15_CH1N, I2C2_SCL and EVENTOUT.
26 PB14 bidirectional 5 V-tolerant Fm+ capable I/O (FT_f); alternate functions include SPI2_MISO, UCPD1_FRSTX, TIM1_CH2N, USART3_RTS_DE_CK, TIM15_CH1, I2C2_SDA and EVENTOUT.
27 PB15 bidirectional 5 V-tolerant USB Type-C PD capable I/O (FT_c); alternate functions include SPI2_MOSI, TIM1_CH3N, TIM15_CH1N, TIM15_CH2 and EVENTOUT, additional functions UCPD1_CC2 and RTC_REFIN; a pull-down may be present at reset (note 3).
28 PA8 bidirectional 5 V-tolerant USB Type-C PD capable I/O (FT_c); alternate functions include MCO, SPI2_NSS, TIM1_CH1, LPTIM2_OUT and EVENTOUT, additional function UCPD1_CC1; a pull-down may be present at reset (note 3).
29 PA9 bidirectional 5 V-tolerant Fm+ capable I/O with USB Type-C PD dead-battery function (FT_fd); alternate functions include MCO, USART1_TX, TIM1_CH2, SPI2_MISO, TIM15_BKIN, I2C1_SCL and EVENTOUT, additional function UCPD1_DBCC1; a pull-down may be present at reset (note 3).
30 PC6 bidirectional 5 V-tolerant I/O (FT) with alternate functions UCPD1_FRSTX, TIM3_CH1 and TIM2_CH3.
31 PC7 bidirectional 5 V-tolerant I/O (FT) with alternate functions UCPD2_FRSTX, TIM3_CH2 and TIM2_CH4.
32 PA10 bidirectional 5 V-tolerant Fm+ capable I/O with USB Type-C PD dead-battery function (FT_fd); alternate functions include SPI2_MOSI, USART1_RX, TIM1_CH3, TIM17_BKIN, I2C1_SDA and EVENTOUT, additional function UCPD1_DBCC2; a pull-down may be present at reset (note 3).
33 PA11 [PA9] bidirectional 5 V-tolerant Fm+ capable I/O (FT_f); alternate functions include SPI1_MISO/I2S1_MCK, USART1_CTS, TIM1_CH4, TIM1_BKIN2, I2C2_SCL and COMP1_OUT; this pin is the default location of the PA9 remap (note 4).
34 PA12 [PA10] bidirectional 5 V-tolerant Fm+ capable I/O (FT_f); alternate functions include SPI1_MOSI/I2S1_SD, USART1_RTS_DE_CK, TIM1_ETR, I2S_CKIN, I2C2_SDA and COMP2_OUT; this pin is the default location of the PA10 remap (note 4).
35 PA13 bidirectional 5 V-tolerant I/O (FT) that after reset is the SWDIO debug function with an internal pull-up enabled; additional alternate functions IR_OUT and EVENTOUT.
36 PA14-BOOT0 bidirectional 5 V-tolerant I/O (FT) that after reset is the SWCLK debug function with an internal pull-down enabled; alternate functions include USART2_TX and EVENTOUT, and it doubles as the BOOT0 boot-mode pin.
37 PA15 bidirectional 5 V-tolerant I/O (FT) with alternate functions SPI1_NSS/I2S1_WS, USART2_RX, TIM2_CH1_ETR, USART4_RTS_DE_CK, USART3_RTS_DE_CK and EVENTOUT.
38 PD0 bidirectional 5 V-tolerant USB Type-C PD capable I/O (FT_c); alternate functions include EVENTOUT, SPI2_NSS and TIM16_CH1, additional function UCPD2_CC1; a pull-down may be present at reset (note 3).
39 PD1 bidirectional 5 V-tolerant I/O with USB Type-C PD dead-battery function (FT_d); alternate functions include EVENTOUT, SPI2_SCK and TIM17_CH1, additional function UCPD2_DBCC1; a pull-down may be present at reset (note 3).
40 PD2 bidirectional 5 V-tolerant USB Type-C PD capable I/O (FT_c); alternate functions include USART3_RTS_DE_CK, TIM3_ETR and TIM1_CH1N, additional function UCPD2_CC2; a pull-down may be present at reset (note 3).
41 PD3 bidirectional 5 V-tolerant I/O with USB Type-C PD dead-battery function (FT_d); alternate functions include USART2_CTS, SPI2_MISO and TIM1_CH2N, additional function UCPD2_DBCC2; a pull-down may be present at reset (note 3).
42 PB3 bidirectional 5 V-tolerant I/O with analog switch function (FT_a); alternate functions include SPI1_SCK/I2S1_CK, TIM1_CH2, TIM2_CH2, USART1_RTS_DE_CK and EVENTOUT, additional function COMP2_INM.
43 PB4 bidirectional 5 V-tolerant I/O with analog switch function (FT_a); alternate functions include SPI1_MISO/I2S1_MCK, TIM3_CH1, USART1_CTS, TIM17_BKIN and EVENTOUT, additional function COMP2_INP.
44 PB5 bidirectional 5 V-tolerant I/O (FT); alternate functions include SPI1_MOSI/I2S1_SD, TIM3_CH2, TIM16_BKIN, LPTIM1_IN1, I2C1_SMBA and COMP2_OUT, additional function WKUP6.
45 PB6 bidirectional 5 V-tolerant I/O with analog switch and Fm+ capability (FT_fa); alternate functions include USART1_TX, TIM1_CH3, TIM16_CH1N, SPI2_MISO, LPTIM1_ETR, I2C1_SCL and EVENTOUT, additional function COMP2_INP.
46 PB7 bidirectional 5 V-tolerant I/O with analog switch and Fm+ capability (FT_fa); alternate functions include USART1_RX, SPI2_MOSI, TIM17_CH1N, USART4_CTS, LPTIM1_IN2, I2C1_SDA and EVENTOUT, additional functions COMP2_INM and PVD_IN.
47 PB8 bidirectional 5 V-tolerant Fm+ capable I/O (FT_f); alternate functions include CEC, SPI2_SCK, TIM16_CH1, USART3_TX, TIM15_BKIN, I2C1_SCL and EVENTOUT.
48 PB9 bidirectional 5 V-tolerant Fm+ capable I/O (FT_f); alternate functions include IR_OUT, UCPD2_FRSTX, TIM17_CH1, USART3_RX, SPI2_NSS, I2C1_SDA and EVENTOUT.

Key specifications

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

CAD (KiCad official)

  • Symbol: STM32G081CBT6
  • Footprint: Package_QFP:LQFP-48_7x7mm_P0.5mm
  • 3D model: LQFP-48(7x7) (KiCad packages3D, STEP)
  • 3D model files: stm32g081cbt6-etched.step / stm32g081cbt6-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); stm32g081cbt6.step / stm32g081cbt6.glb are the bare package body.

Provenance

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

  • Datasheet: STMicroelectronics datasheet (134 pp, sha256 940ddef4661bd787, retrieved 2026-10-08, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (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