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STM32L433CCU6
Public Made by Adomby adom
STMicroelectronics Microcontrollers (MCU/MPU/SOC), UFQFPN-48(7x7). Pinout checked against ST's open pin data, 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
markdownSTM32L433CCU6
STMicroelectronics · Microcontrollers (MCU/MPU/SOC) · UFQFPN-48(7x7)
STM32L433CCU6 from STMicroelectronics, in a UFQFPN-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 domain supply voltage for RTC and 32×32-bit backup registers, 1.55 V to 3.6 V. |
| 2 | PC13 | bidirectional | General-purpose I/O with 5 V tolerance, RTC tamper/timestamp/output/wakeup function support. |
| 3 | PC14-OSC32_IN | bidirectional | General-purpose I/O with 5 V tolerance, configurable as 32 kHz oscillator input. |
| 4 | PC15-OSC32_OUT | bidirectional | General-purpose I/O with 5 V tolerance, configurable as 32 kHz oscillator output. |
| 5 | PH0-OSC_IN | bidirectional | General-purpose I/O with 5 V tolerance, configurable as main crystal oscillator input. |
| 6 | PH1-OSC_OUT | bidirectional | General-purpose I/O with 5 V tolerance, configurable as main crystal oscillator output. |
| 7 | NRST | input | Active-low reset pin with internal weak pull-up resistor and Schmitt trigger comparator. |
| 8 | VSSA/VREF- | power_in | Ground return and negative reference voltage for analog peripherals, 0 V reference. |
| 9 | VDDA/VREF+ | power_in | Analog supply voltage and positive reference for ADC, 2.0 V to VDDA when ADC used. |
| 10 | PA0 | bidirectional | General-purpose I/O with 5 V tolerance on analog functions, ADC1_IN5 input, supports TIM2/COMP/SAI alternate functions. |
| 11 | PA1 | bidirectional | General-purpose I/O with 3.6 V tolerance and LCD function, ADC1_IN6 input, supports TIM2/I2C1/SPI1/USART2 alternate functions. |
| 12 | PA2 | bidirectional | General-purpose I/O with 3.6 V tolerance and LCD function, ADC1_IN7 input, supports TIM2/USART2/LPUART1/QUADSPI alternate functions. |
| 13 | PA3 | bidirectional | General-purpose I/O with 3.6 V tolerance on analog functions and LCD, ADC1_IN8 input, supports TIM2/USART2/LPUART1/QUADSPI alternate functions. |
| 14 | PA4 | bidirectional | General-purpose I/O with 3.6 V tolerance on analog functions, ADC1_IN9 and DAC1_OUT1, supports SPI1/USART2/SAI alternate functions. |
| 15 | PA5 | bidirectional | General-purpose I/O with 3.6 V tolerance on analog functions, ADC1_IN10 and DAC1_OUT2, supports TIM2/SPI1/LPTIM2 alternate functions. |
| 16 | PA6 | bidirectional | General-purpose I/O with 3.6 V tolerance and LCD function, ADC1_IN11 input, supports TIM1/SPI1/USART3/LPUART1/QUADSPI alternate functions. |
| 17 | PA7 | bidirectional | General-purpose I/O with 5 V tolerance on analog functions and LCD, ADC1_IN12 input, supports TIM1/I2C3/SPI1/QUADSPI alternate functions. |
| 18 | PB0 | bidirectional | General-purpose I/O with 3.6 V tolerance and LCD function, ADC1_IN15 input, supports TIM1/SPI1/USART3/QUADSPI/SAI alternate functions. |
| 19 | PB1 | bidirectional | General-purpose I/O with 3.6 V tolerance and LCD function, ADC1_IN16 input, supports TIM1/USART3/LPUART1/QUADSPI alternate functions. |
| 20 | PB2 | bidirectional | General-purpose I/O with 3.6 V tolerance on analog functions, supports RTC/LPTIM1/I2C3/LCD alternate functions. |
| 21 | PB10 | bidirectional | General-purpose I/O with 5 V tolerance and LCD function, supports TIM2/I2C2/SPI2/USART3/LPUART1/QUADSPI/SAI alternate functions. |
| 22 | PB11 | bidirectional | General-purpose I/O with 5 V tolerance and LCD function, supports TIM2/I2C2/USART3/LPUART1/QUADSPI alternate functions. |
| 23 | VSS | power_in | Ground return for I/O banks. |
| 24 | VDD | power_in | Main supply voltage for core and I/O logic, 1.71 V to 3.6 V. |
| 25 | PB12 | bidirectional | General-purpose I/O with 5 V tolerance and LCD function, supports TIM1/I2C2/SPI2/USART3/LPUART1/TSC/SWPMI/SAI alternate functions. |
| 26 | PB13 | bidirectional | General-purpose I/O with 5 V tolerance and LCD function, supports TIM1/I2C2/SPI2/USART3/LPUART1/TSC/SWPMI/SAI alternate functions. |
| 27 | PB14 | bidirectional | General-purpose I/O with 5 V tolerance and LCD function, supports TIM1/I2C2/SPI2/USART3/TSC/SWPMI/SAI alternate functions. |
| 28 | PB15 | bidirectional | General-purpose I/O with 5 V tolerance and LCD function, supports RTC/TIM1/SPI2/TSC/SWPMI/SAI alternate functions. |
| 29 | PA8 | bidirectional | General-purpose I/O with 5 V tolerance and LCD function, supports MCO/TIM1/USART1/SWPMI/SAI/LPTIM2 alternate functions. |
| 30 | PA9 | bidirectional | General-purpose I/O with 5 V tolerance and LCD function, supports TIM1/I2C1/USART1/SAI/TIM15 alternate functions. |
| 31 | PA10 | bidirectional | General-purpose I/O with 5 V tolerance and LCD function, supports TIM1/I2C1/USART1/USB/SAI alternate functions. |
| 32 | PA11 | bidirectional | General-purpose I/O with 5 V tolerance on USB pin, supports TIM1/SPI1/USART1/CAN1/USB_DM/COMP alternate functions. |
| 33 | PA12 | bidirectional | General-purpose I/O with 5 V tolerance on USB pin, supports TIM1/SPI1/USART1/CAN1/USB_DP alternate functions. |
| 34 | PA13 | bidirectional | General-purpose I/O with 5 V tolerance, JTAG TMS/SWDIO debug interface pin with internal pull-up resistor. |
| 35 | VSS | power_in | Ground return for I/O banks. |
| 36 | VDDUSB | power_in | USB supply voltage (3.0 V to 3.6 V when USB used, 0 V to 3.6 V when USB not used). |
| 37 | PA14 | bidirectional | General-purpose I/O with 5 V tolerance, JTAG TCK/SWCLK debug interface pin with internal pull-down resistor. |
| 38 | PA15 | bidirectional | General-purpose I/O with 5 V tolerance and LCD function, JTAG TDI debug pin with internal pull-up resistor. |
| 39 | PB3 | bidirectional | General-purpose I/O with 3.6 V tolerance on analog functions and LCD, JTAG TDO/TRACESWO debug pin, supports TIM2/SPI1/USART1/TSC/SAI alternate functions. |
| 40 | PB4 | bidirectional | General-purpose I/O with 5 V tolerance on analog functions and LCD, JTAG NTRST debug pin with pull-up, supports I2C3/SPI1/SPI3/USART1/TSC/SAI alternate functions. |
| 41 | PB5 | bidirectional | General-purpose I/O with 5 V tolerance and LCD function, supports LPTIM1/I2C1/SPI1/SPI3/USART1/TSC/COMP/SAI/TIM16 alternate functions. |
| 42 | PB6 | bidirectional | General-purpose I/O with 5 V tolerance on analog functions, supports LPTIM1/I2C1/USART1/TSC/SAI/TIM16 alternate functions. |
| 43 | PB7 | bidirectional | General-purpose I/O with 5 V tolerance on analog functions, supports LPTIM1/I2C1/USART1/TSC/LCD/COMP/PVD alternate functions. |
| 44 | PH3-BOOT0 | bidirectional | Boot configuration pin to select execution from FLASH, system memory, or SRAM at power-up. |
| 45 | PB8 | bidirectional | General-purpose I/O with 5 V tolerance and LCD function, supports I2C1/CAN1/SDMMC1/SAI/TIM16 alternate functions. |
| 46 | PB9 | bidirectional | General-purpose I/O with 5 V tolerance and LCD function, supports IR/I2C1/SPI2/CAN1/SDMMC1/SAI alternate functions. |
| 47 | VSS | power_in | Ground return for I/O and analog blocks. |
| 48 | VDD | power_in | Main supply voltage for core and I/O logic, 1.71 V to 3.6 V. |
| 49 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | UFQFPN-48(7x7) |
| Category | Embedded Processors & Controllers |
| Pins | 49 |
CAD (KiCad official)
- Symbol:
STM32L433CCU6 - Footprint:
Package_DFN_QFN:QFN-48-1EP_7x7mm_P0.5mm_EP5.15x5.15mm - 3D model: UFQFPN-48(7x7) (KiCad packages3D, STEP)
- 3D model files:
stm32l433ccu6-etched.step/stm32l433ccu6-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);stm32l433ccu6.step/stm32l433ccu6.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (227 pp, sha256
471e1cceea40b1fa, retrieved 2026-10-03, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-4-5-20251001(text), consensusclaude-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).