# STM32L433VCT6

**STMicroelectronics** · Microcontrollers (MCU/MPU/SOC) · LQFP-100(14x14)

STM32L433VCT6 from STMicroelectronics, in a LQFP-100(14x14). 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 | PE2 | bidirectional | GPIO port E pin 2; 5V tolerant I/O with LCD function; supports trace clock, touch sensing, LCD segment, or SAI audio interface. |
| 2 | PE3 | bidirectional | GPIO port E pin 3; 5V tolerant I/O with LCD function; supports trace data, touch sensing, LCD segment, or SAI audio interface. |
| 3 | PE4 | bidirectional | GPIO port E pin 4; 5V tolerant I/O; supports trace data, touch sensing, or SAI audio interface. |
| 4 | PE5 | bidirectional | GPIO port E pin 5; 5V tolerant I/O; supports trace data, touch sensing, or SAI clock output. |
| 5 | PE6 | bidirectional | GPIO port E pin 6; 5V tolerant I/O; supports trace data or SAI; RTC tamper input or wakeup pin. |
| 6 | VBAT | power_out | Backup battery supply for RTC and 32×32-bit backup registers; 1.55 to 3.6 V. |
| 7 | PC13 | bidirectional | GPIO port C pin 13; 5V tolerant; limited to 3 mA max output; supports RTC tamper/timestamp or wakeup input. |
| 8 | PC14-OSC32_IN | bidirectional | GPIO port C pin 14; LSE crystal oscillator input; 5V tolerant with limited output capability. |
| 9 | PC15-OSC32_OUT | bidirectional | GPIO port C pin 15; LSE crystal oscillator output; 5V tolerant with limited output capability. |
| 10 | VSS | power_in | Ground; must connect to 0 V reference for proper operation. |
| 11 | VDD | power_out | Main digital supply; 1.71 to 3.6 V required. |
| 12 | PH0-OSC_IN | bidirectional | GPIO port H pin 0; 5V tolerant; HSE crystal oscillator input pin. |
| 13 | PH1-OSC_OUT | bidirectional | GPIO port H pin 1; 5V tolerant; HSE crystal oscillator output pin. |
| 14 | NRST | input | External reset input pin; embedded weak pull-up resistor; active low. |
| 15 | PC0 | bidirectional | GPIO port C pin 0; 5V tolerant with analog switch; LPTIM, I2C, UART, LCD, or ADC channel 1. |
| 16 | PC1 | bidirectional | GPIO port C pin 1; 5V tolerant with analog switch; LPTIM, I2C, UART, LCD, or ADC channel 2. |
| 17 | PC2 | bidirectional | GPIO port C pin 2; 5V tolerant with LCD; LPTIM, SPI, LCD, or ADC channel 3. |
| 18 | PC3 | bidirectional | GPIO port C pin 3; 5V tolerant with analog switch; LPTIM, SPI, LCD, SAI, or ADC channel 4. |
| 19 | VSSA | power_in | Analog ground connection; must connect to VSS for ADC/COMP/DAC/OPAMP reference. |
| 20 | VREF- | power_in | Negative ADC reference; typically connected to VSSA or external ground reference. |
| 21 | VREF+ | power_out | Positive ADC reference; 2 to 3.6 V or external buffer output for ADC conversion. |
| 22 | VDDA | power_out | Analog supply voltage; 1.62 to 3.6 V required for ADC, COMP, DAC, and OPAMP operation. |
| 23 | PA0 | bidirectional | GPIO port A pin 0; 5V tolerant with analog switch; timer, USART, COMP, SAI, or ADC channel 5; RTC wakeup. |
| 24 | PA1 | bidirectional | GPIO port A pin 1; 5V tolerant with LCD; timer, I2C, SPI, UART, or ADC channel 6. |
| 25 | PA2 | bidirectional | GPIO port A pin 2; 5V tolerant with LCD; timer, UART, LPTIM, QUADSPI, or ADC channel 7; wakeup. |
| 26 | PA3 | bidirectional | GPIO port A pin 3; 3.6 V tolerant with LCD; timer, UART, LPTIM, QUADSPI, SAI, or ADC channel 8. |
| 27 | VSS | power_in | Ground; must connect to 0 V reference for proper operation. |
| 28 | VDD | power_out | Main digital supply; 1.71 to 3.6 V required. |
| 29 | PA4 | bidirectional | GPIO port A pin 4; 3.6 V tolerant with analog switch; SPI, UART, LPTIM, SAI, or ADC channel 9. |
| 30 | PA5 | bidirectional | GPIO port A pin 5; 3.6 V tolerant with analog switch; timer, SPI, LPTIM, or ADC channel 10. |
| 31 | PA6 | bidirectional | GPIO port A pin 6; 5V tolerant with LCD; timer, SPI, COMP, UART, LPTIM, QUADSPI, or ADC channel 11. |
| 32 | PA7 | bidirectional | GPIO port A pin 7; 5V tolerant with analog switch and LCD; timer, I2C, SPI, QUADSPI, SAI, or ADC channel 12. |
| 33 | PC4 | bidirectional | GPIO port C pin 4; 5V tolerant with LCD; UART transmit, LCD segment, or ADC channel 13. |
| 34 | PC5 | bidirectional | GPIO port C pin 5; 5V tolerant with LCD; UART receive, LCD segment, ADC channel 14, or wakeup input. |
| 35 | PB0 | bidirectional | GPIO port B pin 0; 5V tolerant with LCD; timer, SPI, UART, QUADSPI, COMP, SAI, or ADC channel 15. |
| 36 | PB1 | bidirectional | GPIO port B pin 1; 5V tolerant with LCD; timer, UART, LPTIM, QUADSPI, or ADC channel 16. |
| 37 | PB2 | bidirectional | GPIO port B pin 2; 5V tolerant with analog switch; RTC, LPTIM, I2C, LCD, or COMP reference. |
| 38 | PE7 | bidirectional | GPIO port E pin 7; 5V tolerant; timer external trigger or SAI audio interface. |
| 39 | PE8 | bidirectional | GPIO port E pin 8; 5V tolerant; timer channel or SAI audio clock. |
| 40 | PE9 | bidirectional | GPIO port E pin 9; 5V tolerant; timer channel or SAI frame synchronization. |
| 41 | PE10 | bidirectional | GPIO port E pin 10; 5V tolerant; timer, touch sensing, QUADSPI clock, or SAI audio. |
| 42 | PE11 | bidirectional | GPIO port E pin 11; 5V tolerant; timer, touch sensing, or QUADSPI chip select. |
| 43 | PE12 | bidirectional | GPIO port E pin 12; 5V tolerant; timer, SPI, touch sensing, or QUADSPI data pin. |
| 44 | PE13 | bidirectional | GPIO port E pin 13; 5V tolerant; timer, SPI, touch sensing, or QUADSPI data pin. |
| 45 | PE14 | bidirectional | GPIO port E pin 14; 5V tolerant; timer, SPI, or QUADSPI data pin. |
| 46 | PE15 | bidirectional | GPIO port E pin 15; 5V tolerant; timer break input or SPI data pin. |
| 47 | PB10 | bidirectional | GPIO port B pin 10; 5V tolerant with LCD; timer, I2C, SPI, UART, LPTIM, TSC, QUADSPI, COMP, or SAI. |
| 48 | PB11 | bidirectional | GPIO port B pin 11; 5V tolerant with LCD; timer, I2C, UART, LPTIM, QUADSPI, or COMP output. |
| 49 | VSS | power_in | Ground; must connect to 0 V reference for proper operation. |
| 50 | VDD | power_out | Main digital supply; 1.71 to 3.6 V required. |
| 51 | PB12 | bidirectional | GPIO port B pin 12; 5V tolerant with LCD; timer, I2C, SPI, UART, LPTIM, TSC, SWPMI, or SAI. |
| 52 | PB13 | bidirectional | GPIO port B pin 13; 5V tolerant with LCD; timer, I2C, SPI, UART, LPTIM, TSC, SWPMI, or SAI. |
| 53 | PB14 | bidirectional | GPIO port B pin 14; 5V tolerant with LCD; timer, I2C, SPI, TSC, SWPMI, or SAI. |
| 54 | PB15 | bidirectional | GPIO port B pin 15; 5V tolerant with LCD; RTC reference, timer, SPI, TSC, SWPMI, or SAI. |
| 55 | PD8 | bidirectional | GPIO port D pin 8; 5V tolerant with LCD; UART transmit or LCD segment 28. |
| 56 | PD9 | bidirectional | GPIO port D pin 9; 5V tolerant with LCD; UART receive or LCD segment 29. |
| 57 | PD10 | bidirectional | GPIO port D pin 10; 5V tolerant with LCD; UART clock, touch sensing, or LCD segment 30. |
| 58 | PD11 | bidirectional | GPIO port D pin 11; 5V tolerant with LCD; UART flow control, TSC, LPTIM, or LCD segment 31. |
| 59 | PD12 | bidirectional | GPIO port D pin 12; 5V tolerant with LCD; UART flow control, TSC, LPTIM, or LCD segment 32. |
| 60 | PD13 | bidirectional | GPIO port D pin 13; 5V tolerant with LCD; touch sensing, LPTIM output, or LCD segment 33. |
| 61 | PD14 | bidirectional | GPIO port D pin 14; 5V tolerant with LCD; LCD segment 34 or general I/O. |
| 62 | PD15 | bidirectional | GPIO port D pin 15; 5V tolerant with LCD; LCD segment 35 or general I/O. |
| 63 | PC6 | bidirectional | GPIO port C pin 6; 5V tolerant with LCD; touch sensing, LCD segment 24, or SDMMC data 6. |
| 64 | PC7 | bidirectional | GPIO port C pin 7; 5V tolerant with LCD; touch sensing, LCD segment 25, or SDMMC data 7. |
| 65 | PC8 | bidirectional | GPIO port C pin 8; 5V tolerant with LCD; touch sensing, LCD segment 26, or SDMMC data 0. |
| 66 | PC9 | bidirectional | GPIO port C pin 9; 5V tolerant with LCD; touch sensing, USB output enable, LCD segment 27, or SDMMC data 1. |
| 67 | PA8 | bidirectional | GPIO port A pin 8; 5V tolerant with LCD; MCO output, timer, UART clock, LCD, SWPMI, SAI, or LPTIM output. |
| 68 | PA9 | bidirectional | GPIO port A pin 9; 5V tolerant with LCD; timer, I2C clock, UART transmit, LCD, or SAI. |
| 69 | PA10 | bidirectional | GPIO port A pin 10; 5V tolerant with LCD; timer, I2C data, UART receive, USB sync, LCD, or SAI. |
| 70 | PA11 | bidirectional | GPIO port A pin 11; 5V tolerant with USB; USB DP minus, timer, SPI, COMP, UART, or CAN receive. |
| 71 | PA12 | bidirectional | GPIO port A pin 12; 5V tolerant with USB; USB DP plus, timer, SPI, UART, or CAN transmit. |
| 72 | PA13 | bidirectional | GPIO port A pin 13; JTAG TMS or SWD I/O; internal pull-up enabled after reset for debug. |
| 73 | VDDUSB | power_out | USB supply voltage; 3.0 to 3.6 V required for USB operation. |
| 74 | VSS | power_in | Ground; must connect to 0 V reference for proper operation. |
| 75 | VDD | power_out | Main digital supply; 1.71 to 3.6 V required. |
| 76 | PA14 | bidirectional | GPIO port A pin 14; JTAG TCK or SWD clock; internal pull-down enabled after reset for debug. |
| 77 | PA15 | bidirectional | GPIO port A pin 15; 5V tolerant with LCD; JTAG TDI, timer, UART, SPI, TSC, LCD, or SWPMI; internal pull-up. |
| 78 | PC10 | bidirectional | GPIO port C pin 10; 5V tolerant with LCD; SPI clock, UART transmit, TSC, LCD, or SDMMC data 2. |
| 79 | PC11 | bidirectional | GPIO port C pin 11; 5V tolerant with LCD; SPI data input, UART receive, TSC, LCD, or SDMMC data 3. |
| 80 | PC12 | bidirectional | GPIO port C pin 12; 5V tolerant with LCD; SPI data output, UART clock, TSC, LCD, or SDMMC clock. |
| 81 | PD0 | bidirectional | GPIO port D pin 0; 5V tolerant; SPI chip select or CAN receive. |
| 82 | PD1 | bidirectional | GPIO port D pin 1; 5V tolerant; SPI clock or CAN transmit. |
| 83 | PD2 | bidirectional | GPIO port D pin 2; 5V tolerant with LCD; UART flow control, TSC, LCD, or SDMMC command. |
| 84 | PD3 | bidirectional | GPIO port D pin 3; 5V tolerant; SPI data input or QUADSPI chip select. |
| 85 | PD4 | bidirectional | GPIO port D pin 4; 5V tolerant; SPI data output or QUADSPI data I/O. |
| 86 | PD5 | bidirectional | GPIO port D pin 5; 5V tolerant; UART transmit or QUADSPI data I/O. |
| 87 | PD6 | bidirectional | GPIO port D pin 6; 5V tolerant; UART receive, QUADSPI data I/O, or SAI audio. |
| 88 | PD7 | bidirectional | GPIO port D pin 7; 5V tolerant; UART clock or QUADSPI data I/O. |
| 89 | PB3 | bidirectional | GPIO port B pin 3; 5V tolerant with analog switch and LCD; JTAG TDO, timer, SPI, UART, LCD, or SAI; internal pull-up. |
| 90 | PB4 | bidirectional | GPIO port B pin 4; 5V tolerant with analog switch and LCD; JTAG NTRST, I2C, SPI, UART, TSC, or SAI; internal pull-up. |
| 91 | PB5 | bidirectional | GPIO port B pin 5; 5V tolerant with LCD; LPTIM, I2C, SPI, UART, TSC, COMP, SAI, or timer. |
| 92 | PB6 | bidirectional | GPIO port B pin 6; 5V tolerant with analog switch; LPTIM, I2C, UART, TSC, SAI, or timer. |
| 93 | PB7 | bidirectional | GPIO port B pin 7; 5V tolerant with analog switch and LCD; LPTIM, I2C, UART, TSC, LCD, or RTC/PVD input. |
| 94 | PH3-BOOT0 | input | Boot configuration input pin; selects boot source (flash or system memory) at power-up. |
| 95 | PB8 | bidirectional | GPIO port B pin 8; 5V tolerant with LCD; I2C clock, CAN receive, LCD, SDMMC data 4, SAI, or timer. |
| 96 | PB9 | bidirectional | GPIO port B pin 9; 5V tolerant with LCD; IR output, I2C data, SPI, CAN transmit, LCD, SDMMC data 5, or SAI. |
| 97 | PE0 | bidirectional | GPIO port E pin 0; 5V tolerant with LCD; LCD segment 36 or timer channel output. |
| 98 | PE1 | bidirectional | GPIO port E pin 1; 5V tolerant with LCD; LCD segment 37 or timer output. |
| 99 | VSS | power_in | Ground; must connect to 0 V reference for proper operation. |
| 100 | VDD | power_out | Main digital supply; 1.71 to 3.6 V required. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | LQFP-100(14x14) |
| Category | Embedded Processors & Controllers |
| Pins | 100 |

## CAD (KiCad official)

- Symbol: `STM32L433VCT6`
- Footprint: `Package_QFP:LQFP-100_14x14mm_P0.5mm`
- 3D model: LQFP-100(14x14) (KiCad packages3D, STEP)
- 3D model files: `stm32l433vct6-etched.step` / `stm32l433vct6-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `stm32l433vct6.step` / `stm32l433vct6.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [STMicroelectronics datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588907864424894464) (225 pp, sha256 `87d1543c1fa60974`, retrieved 2026-09-29, tier: lcsc)
- **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](docs/stm32l433vct6-datasheet.pdf)