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STM32F071CBT7

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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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STM32F071CBT7

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

STM32F071CBT7 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 VBAT power_in Backup power supply for the RTC, the 32 kHz oscillator and backup registers, 1.65 to 3.6 V, used when VDD is not present.
2 PC13 bidirectional Standard 3.3 V I/O supplied through the power switch (sink limited to 3 mA); in output mode it must not exceed 2 MHz with a 30 pF maximum load and must not source current such as driving an LED; also WKUP2, RTC_TAMP1, RTC_TS, RTC_OUT.
3 PC14-OSC32_IN bidirectional Standard 3.3 V I/O supplied through the power switch with the same 3 mA, 2 MHz / 30 pF and no-current-source limits as PC13; alternate function OSC32_IN (32 kHz oscillator input).
4 PC15-OSC32_OUT bidirectional Standard 3.3 V I/O supplied through the power switch with the same 3 mA, 2 MHz / 30 pF and no-current-source limits as PC13; alternate function OSC32_OUT (32 kHz oscillator output).
5 PF0-OSC_IN bidirectional 5 V-tolerant (FT) I/O; alternate functions CRS_SYNC and OSC_IN (external 4-32 MHz crystal oscillator input).
6 PF1-OSC_OUT bidirectional 5 V-tolerant (FT) I/O; alternate function OSC_OUT (external 4-32 MHz crystal oscillator output).
7 NRST bidirectional Active-low bidirectional reset pin with embedded weak pull-up, acting as device reset input and internal reset output.
8 VSSA power_in Analog ground.
9 VDDA power_in Analog power supply for ADC, DAC, reset blocks, RCs and PLL; must be greater than or equal to VDD and established first, with a minimum of 2.4 V when the ADC or DAC is used, up to 3.6 V.
10 PA0 bidirectional 3.3 V-tolerant I/O directly connected to ADC (TTa); alternate functions include USART2_CTS, TIM2_CH1_ETR, TSC_G1_IO1, USART4_TX; additional functions ADC_IN0, WKUP1, COMP1_OUT, COMP1_INM6, RTC_TAMP2.
11 PA1 bidirectional 3.3 V-tolerant I/O directly connected to ADC (TTa); alternate functions include USART2_RTS, TIM2_CH2, TIM15_CH1N, TSC_G1_IO2, USART4_RX, EVENTOUT; additional functions ADC_IN1 and COMP1_INP.
12 PA2 bidirectional 3.3 V-tolerant I/O directly connected to ADC (TTa); alternate functions include USART2_TX, TIM2_CH3, TIM15_CH1, TSC_G1_IO3; additional functions ADC_IN2, COMP2_OUT, COMP2_INM6, WKUP4.
13 PA3 bidirectional 3.3 V-tolerant I/O directly connected to ADC (TTa); alternate functions include USART2_RX, TIM2_CH4, TIM15_CH2, TSC_G1_IO4; additional functions ADC_IN3 and COMP2_INP.
14 PA4 bidirectional 3.3 V-tolerant I/O directly connected to ADC (TTa); alternate functions include SPI1_NSS, I2S1_WS, TIM14_CH1, TSC_G2_IO1, USART2_CK; additional functions ADC_IN4 and DAC_OUT1.
15 PA5 bidirectional 3.3 V-tolerant I/O directly connected to ADC (TTa); alternate functions include SPI1_SCK, I2S1_CK, CEC, TIM2_CH1_ETR, TSC_G2_IO2; additional functions ADC_IN5 and DAC_OUT2.
16 PA6 bidirectional 3.3 V-tolerant I/O directly connected to ADC (TTa); alternate functions include SPI1_MISO, I2S1_MCK, TIM3_CH1, TIM1_BKIN, TIM16_CH1, COMP1_OUT, TSC_G2_IO3, EVENTOUT, USART3_CTS; additional function ADC_IN6.
17 PA7 bidirectional 3.3 V-tolerant I/O directly connected to ADC (TTa); alternate functions include SPI1_MOSI, I2S1_SD, TIM3_CH2, TIM14_CH1, TIM1_CH1N, TIM17_CH1, COMP2_OUT, TSC_G2_IO4, EVENTOUT; additional function ADC_IN7.
18 PB0 bidirectional 3.3 V-tolerant I/O directly connected to ADC (TTa); alternate functions include TIM3_CH3, TIM1_CH2N, TSC_G3_IO2, EVENTOUT, USART3_CK; additional function ADC_IN8.
19 PB1 bidirectional 3.3 V-tolerant I/O directly connected to ADC (TTa); alternate functions include TIM3_CH4, USART3_RTS, TIM14_CH1, TIM1_CH3N, TSC_G3_IO3; additional function ADC_IN9.
20 PB2 bidirectional 5 V-tolerant (FT) I/O; alternate function TSC_G3_IO4 (capacitive sensing).
21 PB10 bidirectional 5 V-tolerant (FT) I/O; alternate functions include SPI2_SCK, I2C2_SCL, USART3_TX, CEC, TSC_SYNC, TIM2_CH3.
22 PB11 bidirectional 5 V-tolerant (FT) I/O; alternate functions include USART3_RX, TIM2_CH4, EVENTOUT, TSC_G6_IO1, I2C2_SDA.
23 VSS power_in Ground.
24 VDD power_in Digital power supply, 2.0 to 3.6 V, for I/Os and the internal regulator.
25 PB12 bidirectional 5 V-tolerant (FT) I/O; alternate functions include TIM1_BKIN, TIM15_BKIN, SPI2_NSS, I2S2_WS, USART3_CK, TSC_G6_IO2, EVENTOUT.
26 PB13 bidirectional 5 V-tolerant I/O with FM+ capability (FTf); alternate functions include SPI2_SCK, I2S2_CK, I2C2_SCL, USART3_CTS, TIM1_CH1N, TSC_G6_IO3.
27 PB14 bidirectional 5 V-tolerant I/O with FM+ capability (FTf); alternate functions include SPI2_MISO, I2S2_MCK, I2C2_SDA, USART3_RTS, TIM1_CH2N, TIM15_CH1, TSC_G6_IO4.
28 PB15 bidirectional 5 V-tolerant (FT) I/O; alternate functions include SPI2_MOSI, I2S2_SD, TIM1_CH3N, TIM15_CH1N, TIM15_CH2; additional functions WKUP7 and RTC_REFIN.
29 PA8 bidirectional 5 V-tolerant I/O supplied by VDDIO2; alternate functions include USART1_CK, TIM1_CH1, EVENTOUT, MCO, CRS_SYNC.
30 PA9 bidirectional 5 V-tolerant I/O supplied by VDDIO2; alternate functions include USART1_TX, TIM1_CH2, TIM15_BKIN, TSC_G4_IO1.
31 PA10 bidirectional 5 V-tolerant I/O supplied by VDDIO2; alternate functions include USART1_RX, TIM1_CH3, TIM17_BKIN, TSC_G4_IO2.
32 PA11 bidirectional 5 V-tolerant I/O supplied by VDDIO2; alternate functions include USART1_CTS, TIM1_CH4, COMP1_OUT, TSC_G4_IO3, EVENTOUT.
33 PA12 bidirectional 5 V-tolerant I/O supplied by VDDIO2; alternate functions include USART1_RTS, TIM1_ETR, COMP2_OUT, TSC_G4_IO4, EVENTOUT.
34 PA13 bidirectional 5 V-tolerant I/O supplied by VDDIO2; after reset it is the SWDIO alternate function with internal pull-up enabled; also IR_OUT.
35 VSS power_in Ground.
36 VDDIO2 power_in Digital power supply for the VDDIO2-supplied I/Os, 1.65 to 3.6 V, independent of VDD but not to be applied without a valid VDD supply.
37 PA14 bidirectional 5 V-tolerant I/O supplied by VDDIO2; after reset it is the SWCLK alternate function with internal pull-down enabled; also USART2_TX.
38 PA15 bidirectional 5 V-tolerant I/O supplied by VDDIO2; alternate functions include SPI1_NSS, I2S1_WS, USART2_RX, USART4_RTS, TIM2_CH1_ETR, EVENTOUT.
39 PB3 bidirectional 5 V-tolerant (FT) I/O; alternate functions include SPI1_SCK, I2S1_CK, TIM2_CH2, TSC_G5_IO1, EVENTOUT.
40 PB4 bidirectional 5 V-tolerant (FT) I/O; alternate functions include SPI1_MISO, I2S1_MCK, TIM17_BKIN, TIM3_CH1, TSC_G5_IO2, EVENTOUT.
41 PB5 bidirectional 5 V-tolerant (FT) I/O; alternate functions include SPI1_MOSI, I2S1_SD, I2C1_SMBA, TIM16_BKIN, TIM3_CH2; additional function WKUP6.
42 PB6 bidirectional 5 V-tolerant I/O with FM+ capability (FTf); alternate functions include I2C1_SCL, USART1_TX, TIM16_CH1N, TSC_G5_IO3.
43 PB7 bidirectional 5 V-tolerant I/O with FM+ capability (FTf); alternate functions include I2C1_SDA, USART1_RX, USART4_CTS, TIM17_CH1N, TSC_G5_IO4.
44 BOOT0 input Dedicated boot memory selection pin that selects the boot mode together with the boot selector option bit at startup.
45 PB8 bidirectional 5 V-tolerant I/O with FM+ capability (FTf); alternate functions include I2C1_SCL, CEC, TIM16_CH1, TSC_SYNC.
46 PB9 bidirectional 5 V-tolerant I/O with FM+ capability (FTf); alternate functions include SPI2_NSS, I2S2_WS, I2C1_SDA, IR_OUT, TIM17_CH1, EVENTOUT.
47 VSS power_in Ground.
48 VDD power_in Digital power supply, 2.0 to 3.6 V, for I/Os and the internal regulator.

Key specifications

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

CAD (KiCad official)

  • Symbol: STM32F071CBT7
  • Footprint: Package_QFP:LQFP-48_7x7mm_P0.5mm
  • 3D model: LQFP-48(7x7) (KiCad packages3D, STEP)
  • 3D model files: stm32f071cbt7-etched.step / stm32f071cbt7-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); stm32f071cbt7.step / stm32f071cbt7.glb are the bare package body.

Provenance

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

  • Datasheet: STMicroelectronics datasheet (122 pp, sha256 054f3806403d4305, 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