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STM32F303CCT6
Public Made by Adomby adom
STMicroelectronics Microcontrollers (MCU/MPU/SOC), LQFP-48(7x7). Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownSTM32F303CCT6
STMicroelectronics · Microcontrollers (MCU/MPU/SOC) · LQFP-48(7x7)
STM32F303CCT6 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 for the RTC, the 32 kHz external oscillator and the backup registers, powered through an internal switch when VDD is not present, operating range 1.65 V to 3.6 V. |
| 2 | PC13 | bidirectional | Standard 3.3 V I/O (TC) shared with TIM1_CH1N alternate function and WKUP2/RTC_TAMP1/RTC_TS/RTC_OUT additional functions; supplied through the backup power switch so in output mode it is limited to 2 MHz with a max 30 pF load and must not be used as a current source (note 2). |
| 3 | PC14-OSC32_IN | bidirectional | Standard 3.3 V I/O (TC) that can be used as OSC32_IN for the 32.768 kHz RTC crystal; supplied through the backup power switch, output mode limited to 2 MHz/30 pF load (note 2). |
| 4 | PC15-OSC32_OUT | bidirectional | Standard 3.3 V I/O (TC) that can be used as OSC32_OUT for the 32.768 kHz RTC crystal; supplied through the backup power switch, output mode limited to 2 MHz/30 pF load (note 2). |
| 5 | PF0-OSC_IN | bidirectional | 5 V-tolerant FM+ capable I/O (FTf) usable as the main 4-32 MHz oscillator OSC_IN, alternate functions TIM1_CH3N and I2C2_SDA. |
| 6 | PF1-OSC_OUT | bidirectional | 5 V-tolerant FM+ capable I/O (FTf) usable as the main 4-32 MHz oscillator OSC_OUT, alternate function I2C2_SCL. |
| 7 | NRST | bidirectional | Bidirectional reset pin with an embedded weak pull-up resistor (typ. 40 kΩ); active-low device reset input and internal reset output. |
| 8 | VSSA/VREF- | power_in | Analog ground and negative voltage reference supply pin for the ADCs and other analog blocks. |
| 9 | VDDA/VREF+ | power_in | Analog power supply/positive reference voltage pin, range 2.0 V to 3.6 V (2.4 V to 3.6 V if DAC/OPAMP used); on the 48-pin package VREF+ is internally tied to VDDA (note 3) and must be ≥ VDD, arriving before or with VDD. |
| 10 | PA0 | bidirectional | 3.3 V ADC-connected I/O (TTa, fast ADC channel note 4) with alternate functions USART2_CTS, TIM2_CH1_ETR, TIM8_BKIN, TIM8_ETR, TSC_G1_IO1, COMP1_OUT and additional functions ADC1_IN1, COMP1_INM, RTC_TAMP2, WKUP1, COMP7_INP. |
| 11 | PA1 | bidirectional | 3.3 V ADC-connected I/O (TTa, fast ADC channel note 4) with alternate functions USART2_RTS_DE, TIM2_CH2, TSC_G1_IO2, TIM15_CH1N, RTC_REFIN and additional functions ADC1_IN2, COMP1_INP, OPAMP1_VINP, OPAMP3_VINP. |
| 12 | PA2 | bidirectional | 3.3 V ADC-connected I/O (TTa, fast ADC channel and reduced touch-sensing sensitivity notes 4,5) with alternate functions USART2_TX, TIM2_CH3, TIM15_CH1, TSC_G1_IO3, COMP2_OUT and additional functions ADC1_IN3, COMP2_INM, OPAMP1_VOUT. |
| 13 | PA3 | bidirectional | 3.3 V ADC-connected I/O (TTa, fast ADC channel note 4) with alternate functions USART2_RX, TIM2_CH4, TIM15_CH2, TSC_G1_IO4 and additional functions ADC1_IN4, OPAMP1_VINP, COMP2_INP, OPAMP1_VINM. |
| 14 | PA4 | bidirectional | 3.3 V ADC-connected I/O (TTa, fast ADC channel and reduced touch-sensing sensitivity notes 4,5) with alternate functions SPI1_NSS/SPI3_NSS/I2S3_WS, USART2_CK, TSC_G2_IO1, TIM3_CH2 and additional functions ADC2_IN1, DAC1_OUT1, OPAMP4_VINP plus COMP1-7_INM inputs. |
| 15 | PA5 | bidirectional | 3.3 V ADC-connected I/O (TTa, fast ADC channel and reduced touch-sensing sensitivity notes 4,5) with alternate functions SPI1_SCK, TIM2_CH1_ETR, TSC_G2_IO2 and additional functions ADC2_IN2, DAC1_OUT2, OPAMP1/2/3_VINP/VINM and COMP1-7_INM. |
| 16 | PA6 | bidirectional | 3.3 V ADC-connected I/O (TTa, fast ADC channel and reduced touch-sensing sensitivity notes 4,5) with alternate functions SPI1_MISO, TIM3_CH1, TIM8_BKIN, TIM1_BKIN, TIM16_CH1, COMP1_OUT, TSC_G2_IO3 and additional functions ADC2_IN3, OPAMP2_VOUT. |
| 17 | PA7 | bidirectional | 3.3 V ADC-connected I/O (TTa, fast ADC channel note 4) with alternate functions SPI1_MOSI, TIM3_CH2, TIM17_CH1, TIM1_CH1N, TIM8_CH1N, TSC_G2_IO4, COMP2_OUT and additional functions ADC2_IN4, COMP2_INP, OPAMP2_VINP, OPAMP1_VINP. |
| 18 | PB0 | bidirectional | 3.3 V ADC-connected I/O (TTa) with alternate functions TIM3_CH3, TIM1_CH2N, TIM8_CH2N, TSC_G3_IO2 and additional functions ADC3_IN12, COMP4_INP, OPAMP3_VINP, OPAMP2_VINP. |
| 19 | PB1 | bidirectional | 3.3 V ADC-connected I/O (TTa, reduced touch-sensing sensitivity notes 4,5) with alternate functions TIM3_CH4, TIM1_CH3N, TIM8_CH3N, COMP4_OUT, TSC_G3_IO3 and additional functions ADC3_IN1, OPAMP3_VOUT. |
| 20 | PB2 | bidirectional | 3.3 V ADC-connected I/O (TTa) with alternate function TSC_G3_IO4 and additional functions ADC2_IN12, COMP4_INM, OPAMP3_VINM. |
| 21 | PB10 | bidirectional | 3.3 V ADC-connected I/O (TTa) with alternate functions USART3_TX, TIM2_CH3, TSC_SYNC and additional functions COMP5_INM, OPAMP4_VINM, OPAMP3_VINM. |
| 22 | PB11 | bidirectional | 3.3 V ADC-connected I/O (TTa) with alternate functions USART3_RX, TIM2_CH4, TSC_G6_IO1 and additional functions COMP6_INP, OPAMP4_VINP. |
| 23 | VSS | power_in | Digital ground supply pin. |
| 24 | VDD | power_in | Digital power supply pin, operating range 2.0 V to 3.6 V. |
| 25 | PB12 | bidirectional | 3.3 V ADC-connected I/O (TTa, reduced touch-sensing sensitivity notes 4,5) with alternate functions SPI2_NSS/I2S2_WS, I2C2_SMBA, USART3_CK, TIM1_BKIN, TSC_G6_IO2 and additional functions ADC4_IN3, COMP3_INM, OPAMP4_VOUT. |
| 26 | PB13 | bidirectional | 3.3 V ADC-connected I/O (TTa, fast ADC channel note 4) with alternate functions SPI2_SCK/I2S2_CK, USART3_CTS, TIM1_CH1N, TSC_G6_IO3 and additional functions ADC3_IN5, COMP5_INP, OPAMP4_VINP, OPAMP3_VINP. |
| 27 | PB14 | bidirectional | 3.3 V ADC-connected I/O (TTa, fast ADC channel note 4) with alternate functions SPI2_MISO/I2S2ext_SD, USART3_RTS_DE, TIM1_CH2N, TIM15_CH1, TSC_G6_IO4 and additional functions COMP3_INP, ADC4_IN4, OPAMP2_VINP. |
| 28 | PB15 | bidirectional | 3.3 V ADC-connected I/O (TTa, fast ADC channel note 4) with alternate functions SPI2_MOSI/I2S2_SD, TIM1_CH3N, RTC_REFIN, TIM15_CH1N, TIM15_CH2 and additional functions ADC4_IN5, COMP6_INM. |
| 29 | PA8 | bidirectional | 5 V-tolerant I/O (FT) with alternate functions I2C2_SMBA, I2S2_MCK, USART1_CK, TIM1_CH1, TIM4_ETR, MCO (main clock output) and COMP3_OUT. |
| 30 | PA9 | bidirectional | 5 V-tolerant FM+ capable I/O (FTf) with alternate functions I2C2_SCL, I2S3_MCK, USART1_TX, TIM1_CH2, TIM2_CH3, TIM15_BKIN, TSC_G4_IO1 and COMP5_OUT. |
| 31 | PA10 | bidirectional | 5 V-tolerant FM+ capable I/O (FTf) with alternate functions I2C2_SDA, USART1_RX, TIM1_CH3, TIM2_CH4, TIM8_BKIN, TIM17_BKIN, TSC_G4_IO2 and COMP6_OUT. |
| 32 | PA11 | bidirectional | 5 V-tolerant I/O (FT) with alternate functions USART1_CTS, USB_DM, CAN_RX, TIM1_CH1N, TIM1_CH4, TIM1_BKIN2, TIM4_CH1 and COMP1_OUT. |
| 33 | PA12 | bidirectional | 5 V-tolerant I/O (FT) with alternate functions USART1_RTS_DE, USB_DP, CAN_TX, TIM1_CH2N, TIM1_ETR, TIM4_CH2, TIM16_CH1 and COMP2_OUT. |
| 34 | PA13 | bidirectional | 5 V-tolerant I/O (FT), default SWDIO/JTMS debug function, alternate functions TIM4_CH3, TIM16_CH1N, TSC_G4_IO3 and IR_OUT (infrared transmitter output). |
| 35 | VSS | power_in | Digital ground supply pin. |
| 36 | VDD | power_in | Digital power supply pin, operating range 2.0 V to 3.6 V. |
| 37 | PA14 | bidirectional | 5 V-tolerant FM+ capable I/O (FTf), default SWCLK/JTCK debug function, alternate functions I2C1_SDA, USART2_TX, TIM8_CH2, TIM1_BKIN, TSC_G4_IO4. |
| 38 | PA15 | bidirectional | 5 V-tolerant FM+ capable I/O (FTf), default JTDI debug function, alternate functions I2C1_SCL, SPI1_NSS/SPI3_NSS/I2S3_WS, USART2_RX, TIM1_BKIN, TIM2_CH1_ETR, TIM8_CH1. |
| 39 | PB3 | bidirectional | 5 V-tolerant I/O (FT), default JTDO-TRACESWO debug function, alternate functions SPI3_SCK/I2S3_CK, SPI1_SCK, USART2_TX, TIM2_CH2, TIM3_ETR, TIM4_ETR, TIM8_CH1N, TSC_G5_IO1. |
| 40 | PB4 | bidirectional | 5 V-tolerant I/O (FT), default NJTRST debug function, alternate functions SPI3_MISO/I2S3ext_SD, SPI1_MISO, USART2_RX, TIM3_CH1, TIM16_CH1, TIM17_BKIN, TIM8_CH2N, TSC_G5_IO2. |
| 41 | PB5 | bidirectional | 5 V-tolerant I/O (FT) with alternate functions SPI3_MOSI/I2S3_SD, SPI1_MOSI, I2C1_SMBA, USART2_CK, TIM16_BKIN, TIM3_CH2, TIM8_CH3N, TIM17_CH1. |
| 42 | PB6 | bidirectional | 5 V-tolerant FM+ capable I/O (FTf) with alternate functions I2C1_SCL, USART1_TX, TIM16_CH1N, TIM4_CH1, TIM8_CH1, TSC_G5_IO3, TIM8_ETR, TIM8_BKIN2. |
| 43 | PB7 | bidirectional | 5 V-tolerant FM+ capable I/O (FTf) with alternate functions I2C1_SDA, USART1_RX, TIM3_CH4, TIM4_CH2, TIM17_CH1N, TIM8_BKIN, TSC_G5_IO4. |
| 44 | BOOT0 | input | Dedicated boot memory selection pin sampled at reset (input voltage range 0 to 9 V) that selects boot from user Flash, system memory or embedded SRAM. |
| 45 | PB8 | bidirectional | 5 V-tolerant FM+ capable I/O (FTf) with alternate functions I2C1_SCL, CAN_RX, TIM16_CH1, TIM4_CH3, TIM8_CH2, TIM1_BKIN, TSC_SYNC, COMP1_OUT. |
| 46 | PB9 | bidirectional | 5 V-tolerant FM+ capable I/O (FTf) with alternate functions I2C1_SDA, CAN_TX, TIM17_CH1, TIM4_CH4, TIM8_CH3, IR_OUT, COMP2_OUT. |
| 47 | VSS | power_in | Digital ground supply pin. |
| 48 | VDD | power_in | Digital power supply pin, operating range 2.0 V to 3.6 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | LQFP-48(7x7) |
| Category | Embedded Processors & Controllers |
| Pins | 48 |
CAD (KiCad official)
- Symbol:
STM32F303CCT6 - Footprint:
Package_QFP:LQFP-48_7x7mm_P0.5mm - 3D model: LQFP-48(7x7) (KiCad packages3D, STEP)
- 3D model files:
stm32f303cct6-etched.step/stm32f303cct6-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);stm32f303cct6.step/stm32f303cct6.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (148 pp, sha256
e7a65f330e8fc061, retrieved 2026-09-23, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-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).