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STM32F051C8T6

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by Ray

STMicroelectronics Microcontrollers (MCU/MPU/SOC), LQFP-48(7x7). Datasheet-verified pinout, KiCad symbol/footprint/3D.

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3D Model

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Symbol & Footprint

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Datasheet

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Contents

README

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STM32F051C8T6

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

STM32F051C8T6 from STMicroelectronics, in a LQFP-48(7x7). Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 VBAT power_in Backup power supply (typ 1.8-3.6 V) for RTC and backup registers when VDD is off.
2 PC13 bidirectional GPIO PC13 (TC I/O). Alternate: RTC_TAMP1, RTC_TS, RTC_OUT, WKUP2. Powered through backup switch - max 3 mA sink, 2 MHz output.
3 PC14-OSC32_IN bidirectional GPIO PC14 or 32.768 kHz LSE crystal input (OSC32_IN). Backup-domain pin; limited drive.
4 PC15-OSC32_OUT bidirectional GPIO PC15 or 32.768 kHz LSE crystal output (OSC32_OUT). Backup-domain pin.
5 PF0-OSC_IN bidirectional GPIO PF0 or HSE crystal input (OSC_IN, 4-32 MHz). 5V-tolerant.
6 PF1-OSC_OUT bidirectional GPIO PF1 or HSE crystal output (OSC_OUT). 5V-tolerant.
7 NRST bidirectional Device reset input, active low; also internal reset output. Bidirectional pin with internal pull-up.
8 VSSA power_in Analog ground reference for ADC/DAC/comparators. Tie to VSS at a single point.
9 VDDA power_in Analog power supply, 2.4-3.6 V. Must be >= VDD; feeds ADC, DAC and comparators.
10 PA0 bidirectional GPIO PA0 (TTa, 5V-tolerant analog-capable). AF: USART2_CTS, TIM2_CH1_ETR, COMP1_OUT, TSC_G1_IO1. Additional: ADC_IN0, COMP1_INM6, RTC_TAMP2, WKUP1.
11 PA1 bidirectional GPIO PA1 (TTa). AF: USART2_RTS, TIM2_CH2, TSC_G1_IO2, EVENTOUT. Additional: ADC_IN1, COMP1_INP.
12 PA2 bidirectional GPIO PA2 (TTa). AF: USART2_TX, TIM2_CH3, TIM15_CH1, COMP2_OUT, TSC_G1_IO3. Additional: ADC_IN2, COMP2_INM6.
13 PA3 bidirectional GPIO PA3 (TTa). AF: USART2_RX, TIM2_CH4, TIM15_CH2, TSC_G1_IO4. Additional: ADC_IN3, COMP2_INP.
14 PA4 bidirectional GPIO PA4 (TTa). AF: SPI1_NSS/I2S1_WS, USART2_CK, TIM14_CH1, TSC_G2_IO1. Additional: ADC_IN4, COMP1_INM4, COMP2_INM4, DAC1_OUT.
15 PA5 bidirectional GPIO PA5 (TTa). AF: SPI1_SCK/I2S1_CK, CEC, TIM2_CH1_ETR, TSC_G2_IO2. Additional: ADC_IN5, COMP1_INM5, COMP2_INM5.
16 PA6 bidirectional GPIO PA6 (TTa). AF: SPI1_MISO/I2S1_MCK, TIM3_CH1, TIM1_BKIN, TIM16_CH1, COMP1_OUT, TSC_G2_IO3, EVENTOUT. Additional: ADC_IN6.
17 PA7 bidirectional GPIO PA7 (TTa). AF: SPI1_MOSI/I2S1_SD, TIM3_CH2, TIM14_CH1, TIM1_CH1N, TIM17_CH1, COMP2_OUT, TSC_G2_IO4, EVENTOUT. Additional: ADC_IN7.
18 PB0 bidirectional GPIO PB0 (TTa). AF: TIM3_CH3, TIM1_CH2N, TSC_G3_IO2, EVENTOUT. Additional: ADC_IN8.
19 PB1 bidirectional GPIO PB1 (TTa). AF: TIM3_CH4, TIM14_CH1, TIM1_CH3N, TSC_G3_IO3. Additional: ADC_IN9.
20 PB2 bidirectional GPIO PB2 (FT, 5V-tolerant). AF: TSC_G3_IO4.
21 PB10 bidirectional GPIO PB10 (FT). AF: I2C2_SCL, CEC, TIM2_CH3, TSC_SYNC.
22 PB11 bidirectional GPIO PB11 (FT). AF: I2C2_SDA, TIM2_CH4, TSC_G6_IO1, EVENTOUT.
23 VSS power_in Digital ground return.
24 VDD power_in Digital power supply, 2.0-3.6 V.
25 PB12 bidirectional GPIO PB12 (FT). AF: SPI2_NSS, TIM1_BKIN, TSC_G6_IO2, EVENTOUT.
26 PB13 bidirectional GPIO PB13 (FT). AF: SPI2_SCK, TIM1_CH1N, TSC_G6_IO3.
27 PB14 bidirectional GPIO PB14 (FT). AF: SPI2_MISO, TIM1_CH2N, TIM15_CH1, TSC_G6_IO4.
28 PB15 bidirectional GPIO PB15 (FT). AF: SPI2_MOSI, TIM1_CH3N, TIM15_CH1N, TIM15_CH2. Additional: RTC_REFIN.
29 PA8 bidirectional GPIO PA8 (FT). AF: USART1_CK, TIM1_CH1, EVENTOUT, MCO.
30 PA9 bidirectional GPIO PA9 (FT). AF: USART1_TX, TIM1_CH2, TIM15_BKIN, TSC_G4_IO1.
31 PA10 bidirectional GPIO PA10 (FT). AF: USART1_RX, TIM1_CH3, TIM17_BKIN, TSC_G4_IO2.
32 PA11 bidirectional GPIO PA11 (FT). AF: USART1_CTS, TIM1_CH4, COMP1_OUT, TSC_G4_IO3, EVENTOUT.
33 PA12 bidirectional GPIO PA12 (FT). AF: USART1_RTS, TIM1_ETR, COMP2_OUT, TSC_G4_IO4, EVENTOUT.
34 PA13 bidirectional GPIO PA13 / SWDIO (SWDAT) after reset (FT). AF: IR_OUT, SWDAT. Internal pull-up active on reset.
35 PF6 bidirectional GPIO PF6 (FT). AF: I2C2_SCL.
36 PF7 bidirectional GPIO PF7 (FT). AF: I2C2_SDA.
37 PA14 bidirectional GPIO PA14 / SWCLK after reset (FT). AF: USART2_TX, SWCLK. Internal pull-down active on reset.
38 PA15 bidirectional GPIO PA15 (FT). AF: SPI1_NSS/I2S1_WS, USART2_RX, TIM2_CH1_ETR, EVENTOUT.
39 PB3 bidirectional GPIO PB3 (FT). AF: SPI1_SCK/I2S1_CK, TIM2_CH2, TSC_G5_IO1, EVENTOUT.
40 PB4 bidirectional GPIO PB4 (FT). AF: SPI1_MISO/I2S1_MCK, TIM3_CH1, TSC_G5_IO2, EVENTOUT.
41 PB5 bidirectional GPIO PB5 (FT). AF: SPI1_MOSI/I2S1_SD, I2C1_SMBA, TIM16_BKIN, TIM3_CH2.
42 PB6 bidirectional GPIO PB6 (FTf, Fast-Mode-Plus capable I2C). AF: I2C1_SCL, USART1_TX, TIM16_CH1N, TSC_G5_IO3.
43 PB7 bidirectional GPIO PB7 (FTf). AF: I2C1_SDA, USART1_RX, TIM17_CH1N, TSC_G5_IO4.
44 BOOT0 input Boot memory selection input. Sampled at reset to choose main flash (0) or system memory / SRAM boot (1).
45 PB8 bidirectional GPIO PB8 (FTf). AF: I2C1_SCL, CEC, TIM16_CH1, TSC_SYNC.
46 PB9 bidirectional GPIO PB9 (FTf). AF: I2C1_SDA, IR_OUT, TIM17_CH1, EVENTOUT.
47 VSS power_in Digital ground return (second VSS pin).
48 VDD power_in Digital power supply, 2.0-3.6 V (second VDD pin).

Key specifications

Parameter Value
Manufacturer STMicroelectronics
Package LQFP-48(7x7)
Category MCU
Pins 48

Ordering variants

Same part, different packaging or reel option.

  • STM32F051C8T6
  • STM32F051C6T6
  • STM32F051C4T6
  • STM32F051C8T7
  • STM32F051R8T6
  • STM32F051R6T6
  • STM32F051R4T6
  • STM32F051K8T6
  • STM32F051K6T6
  • STM32F051K4T6
  • STM32F051K8U6
  • STM32F051K6U6
  • STM32F051K4U6

CAD (KiCad official)

  • Symbol: STM32F051C8T6
  • Footprint: Package_QFP:LQFP-48_7x7mm_P0.5mm
  • 3D model: LQFP-48(7x7) (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: STMicroelectronics datasheet (104 pp, sha256 ef78e33984ec5885, retrieved 2026-08-17, tier: manufacturer)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF