STM32L151C8T6A 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	VLCD	power_in	LCD external voltage. Applicable to STM32L152 only; on STM32L151 (this part) this pin must be tied to VDD.
2	PC13-WKUP2	bidirectional	GPIO PC13 (FT - 5 V tolerant). Additional functions: RTC_TAMP1, RTC_TS, RTC_OUT, WKUP2 wake-up input.
3	PC14-OSC32_IN	bidirectional	GPIO PC14 (TC - standard 3.3 V). Additional function OSC32_IN when the LSE 32.768 kHz oscillator is enabled.
4	PC15-OSC32_OUT	bidirectional	GPIO PC15 (TC). Additional function OSC32_OUT when the LSE 32.768 kHz oscillator is enabled.
5	PH0-OSC_IN	bidirectional	GPIO PH0 (TC). Additional function OSC_IN when the HSE 1-24 MHz oscillator is enabled.
6	PH1-OSC_OUT	bidirectional	GPIO PH1 (TC). Additional function OSC_OUT when the HSE crystal oscillator is enabled.
7	NRST	bidirectional	Bidirectional reset pin with embedded weak pull-up. Drive low to reset the MCU; internally asserted during POR/BOR/watchdog resets.
8	VSSA	power_in	Analog ground reference for the ADC, DAC, comparators and internal reference. Must be connected to the system ground plane.
9	VDDA	power_in	Analog supply for ADC, DAC, comparators, reset block and PLL. 1.8 V to 3.6 V; decouple with 100 nF + 1 µF to VSSA.
10	PA0-WKUP1	bidirectional	GPIO PA0 (FT). Alt: USART2_CTS, TIM2_CH1_ETR. Additional: WKUP1 wake-up input, ADC_IN0, COMP1_INP, RTC_TAMP2.
11	PA1	bidirectional	GPIO PA1 (FT). Alt: USART2_RTS, TIM2_CH2, LCD_SEG0. Additional: ADC_IN1, COMP1_INP.
12	PA2	bidirectional	GPIO PA2 (FT). Alt: USART2_TX, TIM2_CH3, TIM9_CH1, LCD_SEG1. Additional: ADC_IN2, COMP1_INP.
13	PA3	bidirectional	GPIO PA3 (TC). Alt: USART2_RX, TIM2_CH4, TIM9_CH2, LCD_SEG2. Additional: ADC_IN3, COMP1_INP.
14	PA4	bidirectional	GPIO PA4 (TC). Alt: SPI1_NSS, USART2_CK. Additional: ADC_IN4, DAC_OUT1, COMP1_INP.
15	PA5	bidirectional	GPIO PA5 (TC). Alt: SPI1_SCK, TIM2_CH1_ETR. Additional: ADC_IN5, DAC_OUT2, COMP1_INP.
16	PA6	bidirectional	GPIO PA6 (FT). Alt: SPI1_MISO, TIM3_CH1, LCD_SEG3, TIM10_CH1. Additional: ADC_IN6, COMP1_INP.
17	PA7	bidirectional	GPIO PA7 (FT). Alt: SPI1_MOSI, TIM3_CH2, LCD_SEG4, TIM11_CH1. Additional: ADC_IN7, COMP1_INP.
18	PB0	bidirectional	GPIO PB0 (TC). Alt: TIM3_CH3, LCD_SEG5. Additional: ADC_IN8, COMP1_INP, VREF_OUT, VLCDRAIL3.
19	PB1	bidirectional	GPIO PB1 (FT). Alt: TIM3_CH4, LCD_SEG6. Additional: ADC_IN9, COMP1_INP, VREF_OUT.
20	PB2/BOOT1	bidirectional	GPIO PB2 (FT) / BOOT1 select input. BOOT1 is sampled at reset together with BOOT0 to choose boot memory. Additional: VLCDRAIL1.
21	PB10	bidirectional	GPIO PB10 (FT). Alt: I2C2_SCL, USART3_TX, TIM2_CH3, LCD_SEG10.
22	PB11	bidirectional	GPIO PB11 (FT). Alt: I2C2_SDA, USART3_RX, TIM2_CH4, LCD_SEG11.
23	VSS_1	power_in	Digital ground. Connect to system ground plane.
24	VDD_1	power_in	Digital supply, 1.65 V to 3.6 V. Decouple to VSS_1 with 100 nF ceramic.
25	PB12	bidirectional	GPIO PB12 (FT). Alt: SPI2_NSS, I2C2_SMBA, USART3_CK, LCD_SEG12, TIM10_CH1. Additional: ADC_IN18, COMP1_INP, VLCDRAIL2.
26	PB13	bidirectional	GPIO PB13 (FT). Alt: SPI2_SCK, USART3_CTS, LCD_SEG13, TIM9_CH1. Additional: ADC_IN19, COMP1_INP.
27	PB14	bidirectional	GPIO PB14 (FT). Alt: SPI2_MISO, USART3_RTS, LCD_SEG14, TIM9_CH2. Additional: ADC_IN20, COMP1_INP.
28	PB15	bidirectional	GPIO PB15 (FT). Alt: SPI2_MOSI, LCD_SEG15, TIM11_CH1. Additional: ADC_IN21, COMP1_INP, RTC_REFIN.
29	PA8	bidirectional	GPIO PA8 (FT). Alt: USART1_CK, MCO (microcontroller clock output), LCD_COM0.
30	PA9	bidirectional	GPIO PA9 (FT). Alt: USART1_TX, LCD_COM1.
31	PA10	bidirectional	GPIO PA10 (FT). Alt: USART1_RX, LCD_COM2.
32	PA11	bidirectional	GPIO PA11 (FT). Alt: USART1_CTS, SPI1_MISO. Additional: USB_DM (USB full-speed D−).
33	PA12	bidirectional	GPIO PA12 (FT). Alt: USART1_RTS, SPI1_MOSI. Additional: USB_DP (USB full-speed D+).
34	PA13/JTMS-SWDIO	bidirectional	GPIO PA13 (FT). Default after reset: JTMS-SWDIO (JTAG mode select / Serial-Wire data). Debug interface muxed with GPIO via alternate function registers.
35	VSS_2	power_in	Digital ground.
36	VDD_2	power_in	Digital supply, 1.65 V to 3.6 V. Decouple to VSS_2 with 100 nF ceramic.
37	PA14/JTCK-SWCLK	bidirectional	GPIO PA14 (FT). Default after reset: JTCK-SWCLK (JTAG / Serial-Wire clock).
38	PA15/JTDI	bidirectional	GPIO PA15 (FT). Default after reset: JTDI. Alt: TIM2_CH1_ETR, SPI1_NSS, LCD_SEG17.
39	PB3/JTDO	bidirectional	GPIO PB3 (FT). Default after reset: JTDO. Alt: TIM2_CH2, SPI1_SCK, LCD_SEG7. Additional: COMP2_INM.
40	PB4/NJTRST	bidirectional	GPIO PB4 (FT). Default after reset: NJTRST (JTAG reset, active low, internal pull-up). Alt: TIM3_CH1, SPI1_MISO, LCD_SEG8. Additional: COMP2_INP.
41	PB5	bidirectional	GPIO PB5 (FT). Alt: I2C1_SMBA, TIM3_CH2, SPI1_MOSI, LCD_SEG9. Additional: COMP2_INP.
42	PB6	bidirectional	GPIO PB6 (FT). Alt: I2C1_SCL, TIM4_CH1, USART1_TX.
43	PB7	bidirectional	GPIO PB7 (FT). Alt: I2C1_SDA, TIM4_CH2, USART1_RX. Additional: PVD_IN.
44	BOOT0	input	Dedicated boot-mode select input (type B). Sampled at reset together with BOOT1 (PB2) to choose Flash, System memory (bootloader) or SRAM boot.
45	PB8	bidirectional	GPIO PB8 (FT). Alt: TIM4_CH3, I2C1_SCL, LCD_SEG16, TIM10_CH1.
46	PB9	bidirectional	GPIO PB9 (FT). Alt: TIM4_CH4, I2C1_SDA, LCD_COM3, TIM11_CH1.
47	VSS_3	power_in	Digital ground.
48	VDD_3	power_in	Digital supply, 1.65 V to 3.6 V. Decouple to VSS_3 with 100 nF ceramic.

Key specifications

Parameter	Value
Manufacturer	STMicroelectronics
Package	LQFP-48(7x7)
Category	MCU
Pins	48

Ordering variants

Same part, different packaging or reel option.

STM32L151C8T6A
STM32L151C8U6A
STM32L151R6T6A
STM32L151R8T6A
STM32L151RBT6A
STM32L151RBY6DTR
STM32L151V8T6A
STM32L151VBT6A
STM32L151VBH6A

CAD (KiCad official)

Symbol: STM32L151C8T6A
Footprint: Package_QFP:LQFP-48_7x7mm_P0.5mm
3D model: LQFP-48(7x7) (KiCad packages3D, STEP)

Provenance

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

Datasheet: STMicroelectronics datasheet (130 pp, sha256 e5e0ab791f4e7879, retrieved 2026-08-17, tier: manufacturer)
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