# STM32L073VBT6

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

STM32L073VBT6 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 | 5 V tolerant (FT) I/O; alternate functions: LCD_SEG38, TIM3_ETR. |
| 2 | PE3 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: TIM22_CH1, LCD_SEG39, TIM3_CH1. |
| 3 | PE4 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: TIM22_CH2, TIM3_CH2. |
| 4 | PE5 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: TIM21_CH1, TIM3_CH3. |
| 5 | PE6 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: TIM21_CH2, TIM3_CH4; additional function: RTC_TAMP3/WKUP3. |
| 6 | VLCD | power_in | LCD controller supply pin (VLCD) as listed in the pin definition table. |
| 7 | PC13 | bidirectional | 5 V tolerant (FT) I/O; additional functions: RTC_TAMP1/RTC_TS/RTC_OUT/WKUP2. |
| 8 | PC14-OSC32_IN | bidirectional | 5 V tolerant (FT) I/O; additional function: OSC32_IN (low-speed oscillator input). |
| 9 | PC15-OSC32_OUT | bidirectional | Standard 3.3 V (TC) I/O; additional function: OSC32_OUT (low-speed oscillator output). |
| 10 | PH9 | bidirectional | 5 V tolerant (FT) I/O; no alternate or additional functions listed in the pin definition table. |
| 11 | PH10 | bidirectional | 5 V tolerant (FT) I/O; no alternate or additional functions listed in the pin definition table. |
| 12 | PH0-OSC_IN | bidirectional | Standard 3.3 V (TC) I/O; alternate function: USB_CRS_SYNC; additional function: OSC_IN (high-speed oscillator input). |
| 13 | PH1-OSC_OUT | bidirectional | Standard 3.3 V (TC) I/O; additional function: OSC_OUT (high-speed oscillator output). |
| 14 | NRST | bidirectional | Bidirectional reset pin with embedded weak pull-up resistor. |
| 15 | PC0 | bidirectional | 5 V tolerant I/O with Fast Mode Plus capability (FTf); alternate functions: LPTIM1_IN1, LCD_SEG18, EVENTOUT, TSC_G7_IO1, LPUART1_RX, I2C3_SCL; additional function: ADC_IN10. |
| 16 | PC1 | bidirectional | 5 V tolerant I/O with Fast Mode Plus capability (FTf); alternate functions: LPTIM1_OUT, LCD_SEG19, EVENTOUT, TSC_G7_IO2, LPUART1_TX, I2C3_SDA; additional function: ADC_IN11. |
| 17 | PC2 | bidirectional | 5 V tolerant I/O with Fast Mode Plus capability (FTf); alternate functions: LPTIM1_IN2, LCD_SEG20, SPI2_MISO/I2S2_MCK, TSC_G7_IO3; additional function: ADC_IN12. |
| 18 | PC3 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: LPTIM1_ETR, LCD_SEG21, SPI2_MOSI/I2S2_SD, TSC_G7_IO4; additional function: ADC_IN13. |
| 19 | VSSA | power_in | Analog ground pin. |
| 20 | VREF- | power_in | Negative reference voltage pin. |
| 21 | VREF+ | power_in | Positive reference voltage pin; section 3.14 lists VREF+ as the DAC input reference voltage. |
| 22 | VDDA | power_in | Analog supply pin. |
| 23 | PA0 | bidirectional | Standard 3.3 V (TC) I/O; alternate functions: TIM2_CH1, TSC_G1_IO1, USART2_CTS, TIM2_ETR, USART4_TX, COMP1_OUT; additional functions: COMP1_INM, ADC_IN0, RTC_TAMP2/WKUP1. |
| 24 | PA1 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: EVENTOUT, LCD_SEG0, TIM2_CH2, TSC_G1_IO2, USART2_RTS/USART2_DE, TIM21_ETR, USART4_RX; additional functions: COMP1_INP, ADC_IN1. |
| 25 | PA2 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: TIM21_CH1, LCD_SEG1, TIM2_CH3, TSC_G1_IO3, USART2_TX, LPUART1_TX, COMP2_OUT; additional functions: COMP2_INM, ADC_IN2. |
| 26 | PA3 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: TIM21_CH2, LCD_SEG2, TIM2_CH4, TSC_G1_IO4, USART2_RX, LPUART1_RX; additional functions: COMP2_INP, ADC_IN3. |
| 27 | VSS | power_in | Ground pin. |
| 28 | VDD | power_in | Digital supply pin. |
| 29 | PA4 | bidirectional | Standard 3.3 V (TC) I/O with reduced touch sensing sensitivity, recommended for use as sampling capacitor I/O; alternate functions: SPI1_NSS, TSC_G2_IO1, USART2_CK, TIM22_ETR; additional functions: COMP1_INM, COMP2_INM, ADC_IN4, DAC_OUT1. |
| 30 | PA5 | bidirectional | Standard 3.3 V (TC) I/O; alternate functions: SPI1_SCK, TIM2_ETR, TSC_G2_IO2, TIM2_CH1; additional functions: COMP1_INM, COMP2_INM, ADC_IN5, DAC_OUT2. |
| 31 | PA6 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: SPI1_MISO, LCD_SEG3, TIM3_CH1, TSC_G2_IO3, LPUART1_CTS, TIM22_CH1, EVENTOUT, COMP1_OUT; additional function: ADC_IN6. |
| 32 | PA7 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: SPI1_MOSI, LCD_SEG4, TIM3_CH2, TSC_G2_IO4, TIM22_CH2, EVENTOUT, COMP2_OUT; additional function: ADC_IN7. |
| 33 | PC4 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: EVENTOUT, LCD_SEG22, LPUART1_TX; additional function: ADC_IN14. |
| 34 | PC5 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: LCD_SEG23, LPUART1_RX, TSC_G3_IO1; additional function: ADC_IN15. |
| 35 | PB0 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: EVENTOUT, LCD_SEG5, TIM3_CH3, TSC_G3_IO2; additional functions: LCD_VLCD3, ADC_IN8, VREF_OUT. |
| 36 | PB1 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: LCD_SEG6, TIM3_CH4, TSC_G3_IO3, LPUART1_RTS/LPUART1_DE; additional functions: ADC_IN9, VREF_OUT. |
| 37 | PB2 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: LPTIM1_OUT, TSC_G3_IO4, I2C3_SMBA; additional function: LCD_VLCD2. |
| 38 | PE7 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: LCD_SEG45, USART5_CK/USART5_RTS/USART5_DE. |
| 39 | PE8 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: LCD_SEG46, USART4_TX. |
| 40 | PE9 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: TIM2_CH1, LCD_SEG47, TIM2_ETR, USART4_RX. |
| 41 | PE10 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: TIM2_CH2, LCD_SEG40, USART5_TX. |
| 42 | PE11 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: TIM2_CH3, USART5_RX; additional function: LCD_VLCD1. |
| 43 | PE12 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: TIM2_CH4, SPI1_NSS; additional function: LCD_VLCD3. |
| 44 | PE13 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: LCD_SEG41, SPI1_SCK. |
| 45 | PE14 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: LCD_SEG42, SPI1_MISO. |
| 46 | PE15 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: LCD_SEG43, SPI1_MOSI. |
| 47 | PB10 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: LCD_SEG10, TIM2_CH3, TSC_SYNC, LPUART1_TX, SPI2_SCK, I2C2_SCL, LPUART1_RX. |
| 48 | PB11 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: EVENTOUT, LCD_SEG11, TIM2_CH4, TSC_G6_IO1, LPUART1_RX, I2C2_SDA, LPUART1_TX. |
| 49 | VSS | power_in | Ground pin. |
| 50 | VDD | power_in | Digital supply pin. |
| 51 | PB12 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: SPI2_NSS/I2S2_WS, LCD_SEG12, LPUART1_RTS/LPUART1_DE, TSC_G6_IO2, I2C2_SMBA, EVENTOUT; additional function: LCD_VLCD1. |
| 52 | PB13 | bidirectional | 5 V tolerant I/O with Fast Mode Plus capability (FTf); alternate functions: SPI2_SCK/I2S2_CK, LCD_SEG13, MCO, TSC_G6_IO3, LPUART1_CTS, I2C2_SCL, TIM21_CH1. |
| 53 | PB14 | bidirectional | 5 V tolerant I/O with Fast Mode Plus capability (FTf); alternate functions: SPI2_MISO/I2S2_MCK, LCD_SEG14, RTC_OUT, TSC_G6_IO4, LPUART1_RTS/LPUART1_DE, I2C2_SDA, TIM21_CH2. |
| 54 | PB15 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: SPI2_MOSI/I2S2_SD, LCD_SEG15, RTC_REFIN. |
| 55 | PD8 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: LPUART1_TX, LCD_SEG28. |
| 56 | PD9 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: LPUART1_RX, LCD_SEG29. |
| 57 | PD10 | bidirectional | 5 V tolerant (FT) I/O; alternate function: LCD_SEG30. |
| 58 | PD11 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: LPUART1_CTS, LCD_SEG31. |
| 59 | PD12 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: LPUART1_RTS/LPUART1_DE, LCD_SEG32. |
| 60 | PD13 | bidirectional | 5 V tolerant (FT) I/O; alternate function: LCD_SEG33. |
| 61 | PD14 | bidirectional | 5 V tolerant (FT) I/O; alternate function: LCD_SEG34. |
| 62 | PD15 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: USB_CRS_SYNC, LCD_SEG35. |
| 63 | PC6 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: TIM22_CH1, LCD_SEG24, TIM3_CH1, TSC_G8_IO1. |
| 64 | PC7 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: TIM22_CH2, LCD_SEG25, TIM3_CH2, TSC_G8_IO2. |
| 65 | PC8 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: TIM22_ETR, LCD_SEG26, TIM3_CH3, TSC_G8_IO3. |
| 66 | PC9 | bidirectional | 5 V tolerant I/O with Fast Mode Plus capability (FTf); alternate functions: TIM21_ETR, LCD_SEG27, USB_NOE/TIM3_CH4, TSC_G8_IO4, I2C3_SDA. |
| 67 | PA8 | bidirectional | 5 V tolerant I/O with Fast Mode Plus capability (FTf); alternate functions: MCO, LCD_COM0, USB_CRS_SYNC, EVENTOUT, USART1_CK, I2C3_SCL. |
| 68 | PA9 | bidirectional | 5 V tolerant I/O with Fast Mode Plus capability (FTf); alternate functions: MCO, LCD_COM1, TSC_G4_IO1, USART1_TX, I2C1_SCL, I2C3_SMBA. |
| 69 | PA10 | bidirectional | 5 V tolerant I/O with Fast Mode Plus capability (FTf); alternate functions: LCD_COM2, TSC_G4_IO2, USART1_RX, I2C1_SDA. |
| 70 | PA11 | bidirectional | 5 V tolerant (FT) I/O powered by VDD_USB; alternate functions: SPI1_MISO, EVENTOUT, TSC_G4_IO3, USART1_CTS, COMP1_OUT; additional function: USB_DM. |
| 71 | PA12 | bidirectional | 5 V tolerant (FT) I/O powered by VDD_USB; alternate functions: SPI1_MOSI, EVENTOUT, TSC_G4_IO4, USART1_RTS/USART1_DE, COMP2_OUT; additional function: USB_DP. |
| 72 | PA13 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: SWDIO, USB_NOE, LPUART1_RX. |
| 73 | VDD | power_in | Digital supply pin. |
| 74 | VSS | power_in | Ground pin. |
| 75 | VDD_USB | power_in | Supply pin for the USB-related I/Os (PA11, PA12); VDD_USB must be used for characteristics that refer to VDD for these pins. |
| 76 | PA14 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: SWCLK, USART2_TX, LPUART1_TX. |
| 77 | PA15 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: SPI1_NSS, LCD_SEG17, TIM2_ETR, EVENTOUT, USART2_RX, TIM2_CH1, USART4_RTS/USART4_DE. |
| 78 | PC10 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: LPUART1_TX, LCD_COM4/LCD_SEG28/LCD_SEG48, USART4_TX. |
| 79 | PC11 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: LPUART1_RX, LCD_COM5/LCD_SEG29/LCD_SEG49, USART4_RX. |
| 80 | PC12 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: LCD_COM6/LCD_SEG30/LCD_SEG50, USART5_TX, USART4_CK. |
| 81 | PD0 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: TIM21_CH1, SPI2_NSS/I2S2_WS. |
| 82 | PD1 | bidirectional | 5 V tolerant (FT) I/O; alternate function: SPI2_SCK/I2S2_CK. |
| 83 | PD2 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: LPUART1_RTS/LPUART1_DE, LCD_COM7/LCD_SEG31/LCD_SEG51, TIM3_ETR, USART5_RX. |
| 84 | PD3 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: USART2_CTS, LCD_SEG44, SPI2_MISO/I2S2_MCK. |
| 85 | PD4 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: USART2_RTS/USART2_DE, SPI2_MOSI/I2S2_SD. |
| 86 | PD5 | bidirectional | 5 V tolerant (FT) I/O; alternate function: USART2_TX. |
| 87 | PD6 | bidirectional | 5 V tolerant (FT) I/O; alternate function: USART2_RX. |
| 88 | PD7 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: USART2_CK, TIM21_CH2. |
| 89 | PB3 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: SPI1_SCK, LCD_SEG7, TIM2_CH2, TSC_G5_IO1, EVENTOUT, USART1_RTS/USART1_DE, USART5_TX; additional function: COMP2_INM. |
| 90 | PB4 | bidirectional | 5 V tolerant I/O with Fast Mode Plus capability (FTf); alternate functions: SPI1_MISO, LCD_SEG8, TIM3_CH1, TSC_G5_IO2, TIM22_CH1, USART1_CTS, USART5_RX, I2C3_SDA; additional function: COMP2_INP. |
| 91 | PB5 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: SPI1_MOSI, LCD_SEG9, LPTIM1_IN1, I2C1_SMBA, TIM3_CH2/TIM22_CH2, USART1_CK, USART5_CK, USART5_RTS/USART5_DE; additional function: COMP2_INP. |
| 92 | PB6 | bidirectional | 5 V tolerant I/O with Fast Mode Plus capability (FTf); alternate functions: USART1_TX, I2C1_SCL, LPTIM1_ETR, TSC_G5_IO3; additional function: COMP2_INP. |
| 93 | PB7 | bidirectional | 5 V tolerant I/O with Fast Mode Plus capability (FTf); alternate functions: USART1_RX, I2C1_SDA, LPTIM1_IN2, TSC_G5_IO4, USART4_CTS; additional functions: COMP2_INP, PVD_IN. |
| 94 | BOOT0 | input | Dedicated BOOT0 boot-mode input pin. |
| 95 | PB8 | bidirectional | 5 V tolerant I/O with Fast Mode Plus capability (FTf); alternate functions: LCD_SEG16, TSC_SYNC, I2C1_SCL. |
| 96 | PB9 | bidirectional | 5 V tolerant I/O with Fast Mode Plus capability (FTf); alternate functions: LCD_COM3, EVENTOUT, I2C1_SDA, SPI2_NSS/I2S2_WS. |
| 97 | PE0 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: LCD_SEG36, EVENTOUT. |
| 98 | PE1 | bidirectional | 5 V tolerant (FT) I/O; alternate functions: LCD_SEG37, EVENTOUT. |
| 99 | VSS | power_in | Ground pin. |
| 100 | VDD | power_in | Digital supply pin. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `STM32L073VBT6`
- Footprint: `Package_QFP:LQFP-100_14x14mm_P0.5mm`
- 3D model: LQFP-100(14x14) (KiCad packages3D, STEP)
- 3D model files: `stm32l073vbt6-etched.step` / `stm32l073vbt6-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `stm32l073vbt6.step` / `stm32l073vbt6.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/8588923781293486080) (157 pp, sha256 `d574d5fba68fb5bd`, 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](docs/stm32l073vbt6-datasheet.pdf)