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STM32L053C8T7

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STMicroelectronics Microcontrollers (MCU/MPU/SOC), LQFP-48(7x7). Pinout checked against ST's open pin data, KiCad symbol/footprint/3D.

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STM32L053C8T7

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

STM32L053C8T7 from STMicroelectronics, in a LQFP-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 VLCD power_in LCD power supply pin for the optional LCD step-up converter; the datasheet gives no further voltage limit for this pin in the pin table.
2 PC13 bidirectional 5 V tolerant (FT) I/O with additional functions RTC_TAMP1/RTC_TS/RTC_OUT/WKUP2; floating input during and after reset.
3 PC14-OSC32_IN bidirectional 5 V tolerant (FT) I/O that is also the 32 kHz oscillator input OSC32_IN; floating input during and after reset.
4 PC15-OSC32_OUT bidirectional Standard 3.3 V (TC) I/O that is also the 32 kHz oscillator output OSC32_OUT; floating input during and after reset.
5 PH0-OSC_IN bidirectional Standard 3.3 V (TC) I/O that is also the HSE oscillator input OSC_IN, with alternate function USB_CRS_SYNC.
6 PH1-OSC_OUT bidirectional Standard 3.3 V (TC) I/O that is also the HSE oscillator output OSC_OUT.
7 NRST bidirectional Bidirectional active-low reset pin with embedded weak pull-up resistor.
8 VSSA power_in Analog ground supply pin for the ADC, DAC, comparators and reference.
9 VDDA power_in Analog supply pin for the ADC, DAC, comparators and reference.
10 PA0 bidirectional Standard 3.3 V (TC) I/O with alternate functions TIM2_CH1, TSC_G1_IO1, USART2_CTS, TIM2_ETR, COMP1_OUT and additional functions COMP1_INM6, ADC_IN0, RTC_TAMP2/WKUP1.
11 PA1 bidirectional 5 V tolerant (FT) I/O with alternate functions EVENTOUT, LCD_SEG0, TIM2_CH2, TSC_G1_IO2, USART2_RTS/USART2_DE, TIM21_ETR and additional functions COMP1_INP, ADC_IN1.
12 PA2 bidirectional 5 V tolerant (FT) I/O with alternate functions TIM21_CH1, LCD_SEG1, TIM2_CH3, TSC_G1_IO3, USART2_TX, COMP2_OUT and additional functions COMP2_INM6, ADC_IN2.
13 PA3 bidirectional 5 V tolerant (FT) I/O with alternate functions TIM21_CH2, LCD_SEG2, TIM2_CH4, TSC_G1_IO4, USART2_RX and additional functions COMP2_INP, ADC_IN3.
14 PA4 bidirectional Standard 3.3 V (TC) I/O with reduced touch sensing sensitivity, so it is recommended to use it as a sampling capacitor I/O; alternate functions SPI1_NSS, TSC_G2_IO1, USART2_CK, TIM22_ETR and additional functions COMP1_INM4, COMP2_INM4, ADC_IN4, DAC_OUT.
15 PA5 bidirectional Standard 3.3 V (TC) I/O with alternate functions SPI1_SCK, TIM2_ETR, TSC_G2_IO2, TIM2_CH1 and additional functions COMP1_INM5, COMP2_INM5, ADC_IN5.
16 PA6 bidirectional 5 V tolerant (FT) I/O with alternate functions SPI1_MISO, LCD_SEG3, TSC_G2_IO3, LPUART1_CTS, TIM22_CH1, EVENTOUT, COMP1_OUT and additional function ADC_IN6.
17 PA7 bidirectional 5 V tolerant (FT) I/O with alternate functions SPI1_MOSI, LCD_SEG4, TSC_G2_IO4, TIM22_CH2, EVENTOUT, COMP2_OUT and additional function ADC_IN7.
18 PB0 bidirectional 5 V tolerant (FT) I/O with alternate functions EVENTOUT, LCD_SEG5, TSC_G3_IO2 and additional functions LCD_VLCD3, ADC_IN8, VREF_OUT.
19 PB1 bidirectional 5 V tolerant (FT) I/O with alternate functions LCD_SEG6, TSC_G3_IO3, LPUART1_RTS/LPUART1_DE and additional functions ADC_IN9, VREF_OUT.
20 PB2 bidirectional 5 V tolerant (FT) I/O with alternate functions LPTIM1_OUT, TSC_G3_IO4 and additional function LCD_VLCD2.
21 PB10 bidirectional 5 V tolerant (FT) I/O with alternate functions LCD_SEG10, TIM2_CH3, TSC_SYNC, LPUART1_TX, SPI2_SCK, I2C2_SCL.
22 PB11 bidirectional 5 V tolerant (FT) I/O with alternate functions EVENTOUT, LCD_SEG11, TIM2_CH4, TSC_G6_IO1, LPUART1_RX, I2C2_SDA.
23 VSS power_in Ground supply pin.
24 VDD power_in Digital supply pin (1.65 V to 3.6 V device supply range).
25 PB12 bidirectional 5 V tolerant (FT) I/O with alternate functions SPI2_NSS/I2S2_WS, LCD_SEG12, LPUART1_RTS/LPUART1_DE, TSC_G6_IO2, I2C2_SMBA, EVENTOUT and additional function LCD_VLCD1.
26 PB13 bidirectional 5 V tolerant Fast Mode Plus capable (FTf) I/O with alternate functions SPI2_SCK/I2S2_CK, LCD_SEG13, TSC_G6_IO3, LPUART1_CTS, I2C2_SCL, TIM21_CH1.
27 PB14 bidirectional 5 V tolerant Fast Mode Plus capable (FTf) I/O with alternate functions SPI2_MISO/I2S2_MCK, LCD_SEG14, RTC_OUT, TSC_G6_IO4, LPUART1_RTS/LPUART1_DE, I2C2_SDA, TIM21_CH2.
28 PB15 bidirectional 5 V tolerant (FT) I/O with alternate functions SPI2_MOSI/I2S2_SD, LCD_SEG15, RTC_REFIN.
29 PA8 bidirectional 5 V tolerant (FT) I/O with alternate functions MCO, LCD_COM0, USB_CRS_SYNC, EVENTOUT, USART1_CK.
30 PA9 bidirectional 5 V tolerant (FT) I/O with alternate functions MCO, LCD_COM1, TSC_G4_IO1, USART1_TX.
31 PA10 bidirectional 5 V tolerant (FT) I/O with alternate functions LCD_COM2, TSC_G4_IO2, USART1_RX.
32 PA11 bidirectional 5 V tolerant (FT) I/O powered by VDD_USB (note 2), with alternate functions SPI1_MISO, EVENTOUT, TSC_G4_IO3, USART1_CTS, COMP1_OUT and additional function USB_DM.
33 PA12 bidirectional 5 V tolerant (FT) I/O powered by VDD_USB (note 2), with alternate functions SPI1_MOSI, EVENTOUT, TSC_G4_IO4, USART1_RTS/USART1_DE, COMP2_OUT and additional function USB_DP.
34 PA13 bidirectional 5 V tolerant (FT) I/O with alternate functions SWDIO and USB_NOE.
35 VSS power_in Ground supply pin.
36 VDD_USB power_in Supply pin for the I/Os PA11 and PA12 and the USB; for characteristics that refer to VDD on those pins, VDD_USB must be used.
37 PA14 bidirectional 5 V tolerant (FT) I/O with alternate functions SWCLK and USART2_TX.
38 PA15 bidirectional 5 V tolerant (FT) I/O with alternate functions SPI1_NSS, LCD_SEG17, TIM2_ETR, EVENTOUT, USART2_RX, TIM2_CH1.
39 PB3 bidirectional 5 V tolerant (FT) I/O with alternate functions SPI1_SCK, LCD_SEG7, TIM2_CH2, TSC_G5_IO1, EVENTOUT and additional function COMP2_INN.
40 PB4 bidirectional 5 V tolerant (FT) I/O with alternate functions SPI1_MISO, LCD_SEG8, EVENTOUT, TSC_G5_IO2, TIM22_CH1 and additional function COMP2_INP.
41 PB5 bidirectional 5 V tolerant (FT) I/O with alternate functions SPI1_MOSI, LCD_SEG9, LPTIM1_IN1, I2C1_SMBA, TIM22_CH2 and additional function COMP2_INP.
42 PB6 bidirectional 5 V tolerant Fast Mode Plus capable (FTf) I/O with alternate functions USART1_TX, I2C1_SCL, LPTIM1_ETR, TSC_G5_IO3 and additional function COMP2_INP.
43 PB7 bidirectional 5 V tolerant Fast Mode Plus capable (FTf) I/O with alternate functions USART1_RX, I2C1_SDA, LPTIM1_IN2, TSC_G5_IO4 and additional functions COMP2_INP, PVD_IN.
44 BOOT0 input Dedicated BOOT0 input pin used to select the boot mode.
45 PB8 bidirectional 5 V tolerant Fast Mode Plus capable (FTf) I/O with alternate functions LCD_SEG16, TSC_SYNC, I2C1_SCL.
46 PB9 bidirectional 5 V tolerant Fast Mode Plus capable (FTf) I/O with alternate functions LCD_COM3, EVENTOUT, I2C1_SDA, SPI2_NSS/I2S2_WS.
47 VSS power_in Ground supply pin.
48 VDD power_in Digital supply pin (1.65 V to 3.6 V device supply range).

Key specifications

Parameter Value
Manufacturer STMicroelectronics
Package LQFP-48(7x7)
Category Embedded Processors & Controllers
Pins 48

CAD (KiCad official)

  • Symbol: STM32L053C8T7
  • Footprint: Package_QFP:LQFP-48_7x7mm_P0.5mm
  • 3D model: LQFP-48(7x7) (KiCad packages3D, STEP)
  • 3D model files: stm32l053c8t7-etched.step / stm32l053c8t7-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); stm32l053c8t7.step / stm32l053c8t7.glb are the bare package body.

Provenance

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

  • Datasheet: STMicroelectronics datasheet (136 pp, sha256 b30ef01e0e2d9c80, 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