STM8L151C6T3 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	PA0/[USART1_CK]/SWIM/BEEP/IR_TIM	bidirectional	GPIO port A0. Muxed with SWIM debug/programming I/O (default after reset), remappable USART1 synchronous clock, beeper output and IR timer output. High-sink LED driver capable; input pull-up applied during and after reset.
2	NRST/PA1	bidirectional	Chip reset input (active-low, internal pull-up) with alternate function as GPIO port A1. As PA1 it can be configured only as open-drain or push-pull output, not as input (see RM0031).
3	PA2/OSC_IN/[USART1_TX]/[SPI1_MISO]	bidirectional	GPIO port A2 (5V-tolerant). Alternate functions: HSE crystal oscillator input, remappable USART1 TX, remappable SPI1 MISO.
4	PA3/OSC_OUT/[USART1_RX]/[SPI1_MOSI]	bidirectional	GPIO port A3 (5V-tolerant). Alternate functions: HSE crystal oscillator output, remappable USART1 RX, remappable SPI1 MOSI.
5	PA4/TIM2_BKIN/ADC1_IN2/COMP1_INP	bidirectional	GPIO port A4 (3.6V-tolerant TT I/O). Alternate functions: TIM2 break input, ADC1 input channel 2, Comparator 1 positive input.
6	PA5/TIM3_BKIN/ADC1_IN1/COMP1_INP	bidirectional	GPIO port A5 (3.6V-tolerant TT I/O). Alternate functions: TIM3 break input, ADC1 input channel 1, Comparator 1 positive input.
7	PA6/[ADC1_TRIG]/ADC1_IN0/COMP1_INP	bidirectional	GPIO port A6 (3.6V-tolerant TT I/O). Alternate functions: remappable ADC1 external trigger, ADC1 input channel 0, Comparator 1 positive input.
8	PA7	bidirectional	GPIO port A7 (5V-tolerant FT I/O). Standard high-sink push-pull / open-drain output; input floating / weak pull-up / external interrupt capable.
9	VSS1/VSSA/VREF-	power_in	Common digital I/O ground, analog ground and ADC1 negative voltage reference. Connect to system 0V.
10	VDD1	power_in	Digital power supply. 1.8 V to 3.6 V (down to 1.65 V at power-down).
11	VDDA	power_in	Analog supply voltage for the ADC, DAC, comparators and analog reference. Tie to VDD via ferrite/RC per typical application.
12	VREF+	power_in	ADC1 and DAC positive voltage reference input. Must satisfy VREF+ ≤ VDDA.
13	Reserved	unconnected	Reserved on STM8L151xx devices. Must be tied to VDD.
14	PE0	bidirectional	GPIO port E0 (5V-tolerant FT I/O). Standard high-sink push-pull / open-drain output; input floating / weak pull-up / external interrupt capable.
15	PE1/TIM1_CH2N	bidirectional	GPIO port E1 (3.6V-tolerant TT I/O). Alternate function: TIM1 inverted channel 2.
16	PE2/TIM1_CH3N	bidirectional	GPIO port E2 (3.6V-tolerant TT I/O). Alternate function: TIM1 inverted channel 3.
17	PE3	bidirectional	GPIO port E3 (3.6V-tolerant TT I/O). Standard high-sink push-pull / open-drain output; input floating / weak pull-up / external interrupt capable.
18	PE4	bidirectional	GPIO port E4 (3.6V-tolerant TT I/O). Standard high-sink push-pull / open-drain output; input floating / weak pull-up / external interrupt capable.
19	PE5/ADC1_IN23/COMP2_INP/COMP1_INP	bidirectional	GPIO port E5 (3.6V-tolerant TT I/O). Alternate functions: ADC1 input channel 23, Comparator 2 positive input, Comparator 1 positive input.
20	PD0/TIM3_CH2/[ADC1_TRIG]/ADC1_IN22/COMP2_INP/COMP1_INP	bidirectional	GPIO port D0 (3.6V-tolerant TT I/O). Alternate functions: TIM3 channel 2, remappable ADC1 trigger, ADC1 input channel 22, Comparator 2/1 positive input.
21	PD1/TIM3_ETR/ADC1_IN21/COMP2_INP/COMP1_INP	bidirectional	GPIO port D1 (3.6V-tolerant TT I/O). Alternate functions: TIM3 external trigger, ADC1 input channel 21, Comparator 2/1 positive input.
22	PD2/TIM1_CH1/ADC1_IN20/COMP1_INP	bidirectional	GPIO port D2 (3.6V-tolerant TT I/O). Alternate functions: TIM1 channel 1, ADC1 input channel 20, Comparator 1 positive input.
23	PD3/TIM1_ETR/ADC1_IN19/COMP1_INP	bidirectional	GPIO port D3 (3.6V-tolerant TT I/O). Alternate functions: TIM1 external trigger, ADC1 input channel 19, Comparator 1 positive input.
24	PB0/TIM2_CH1/ADC1_IN18/COMP1_INP	bidirectional	GPIO port B0 (3.6V-tolerant TT I/O). Alternate functions: TIM2 channel 1, ADC1 input channel 18, Comparator 1 positive input.
25	PB1/TIM3_CH1/ADC1_IN17/COMP1_INP	bidirectional	GPIO port B1 (3.6V-tolerant TT I/O). Alternate functions: TIM3 channel 1, ADC1 input channel 17, Comparator 1 positive input.
26	PB2/TIM2_CH2/ADC1_IN16/COMP1_INP	bidirectional	GPIO port B2 (3.6V-tolerant TT I/O). Alternate functions: TIM2 channel 2, ADC1 input channel 16, Comparator 1 positive input.
27	PB3/TIM2_ETR/ADC1_IN15/COMP1_INP	bidirectional	GPIO port B3 (3.6V-tolerant TT I/O). Alternate functions: TIM2 external trigger, ADC1 input channel 15, Comparator 1 positive input.
28	PB4/[SPI1_NSS]/ADC1_IN14/COMP1_INP	bidirectional	GPIO port B4 (3.6V-tolerant TT I/O). Alternate functions: remappable SPI1 slave-select, ADC1 input channel 14, Comparator 1 positive input.
29	PB5/[SPI1_SCK]/ADC1_IN13/COMP1_INP	bidirectional	GPIO port B5 (3.6V-tolerant TT I/O). Alternate functions: remappable SPI1 clock, ADC1 input channel 13, Comparator 1 positive input.
30	PB6/[SPI1_MOSI]/ADC1_IN12/COMP1_INP	bidirectional	GPIO port B6 (3.6V-tolerant TT I/O). Alternate functions: remappable SPI1 MOSI, ADC1 input channel 12, Comparator 1 positive input.
31	PB7/[SPI1_MISO]/ADC1_IN11/COMP1_INP	bidirectional	GPIO port B7 (3.6V-tolerant TT I/O). Alternate functions: remappable SPI1 MISO, ADC1 input channel 11, Comparator 1 positive input.
32	PF0/ADC1_IN24/DAC_OUT	bidirectional	GPIO port F0 (3.6V-tolerant TT I/O). Alternate functions: ADC1 input channel 24, 12-bit DAC output.
33	PD4/TIM1_CH2/ADC1_IN10/COMP1_INP	bidirectional	GPIO port D4 (3.6V-tolerant TT I/O). Alternate functions: TIM1 channel 2, ADC1 input channel 10, Comparator 1 positive input.
34	PD5/TIM1_CH3/ADC1_IN9/COMP1_INP	bidirectional	GPIO port D5 (3.6V-tolerant TT I/O). Alternate functions: TIM1 channel 3, ADC1 input channel 9, Comparator 1 positive input.
35	PD6/TIM1_BKIN/ADC1_IN8/RTC_CALIB/VREFINT/COMP1_INP	bidirectional	GPIO port D6 (3.6V-tolerant TT I/O). Alternate functions: TIM1 break input, ADC1 input channel 8, RTC calibration output, internal reference voltage output, Comparator 1 positive input.
36	PD7/TIM1_CH1N/ADC1_IN7/RTC_ALARM/VREFINT/COMP1_INP	bidirectional	GPIO port D7 (3.6V-tolerant TT I/O). Alternate functions: TIM1 inverted channel 1, ADC1 input channel 7, RTC alarm output, internal reference voltage output, Comparator 1 positive input.
37	PC0/I2C1_SDA	bidirectional	GPIO port C0 (5V-tolerant FT I/O, true open-drain). Alternate function: I2C1 data line (SDA), supports Fast-mode 400 kHz, SMBus and PMBus. External pull-up required for I2C operation.
38	PC1/I2C1_SCL	bidirectional	GPIO port C1 (5V-tolerant FT I/O, true open-drain). Alternate function: I2C1 clock line (SCL), supports Fast-mode 400 kHz, SMBus and PMBus. External pull-up required for I2C operation.
39	VDD2	power_in	I/O power supply for the second supply domain (1.8 V to 3.6 V). Tie to same rail as VDD1 in most applications.
40	VSS2	power_in	I/O ground for the second supply domain. Tie to system 0V.
41	PC2/USART1_RX/ADC1_IN6/COMP1_INP/VREFINT	bidirectional	GPIO port C2 (3.6V-tolerant TT I/O). Alternate functions: USART1 receive, ADC1 input channel 6, Comparator 1 positive input, internal voltage reference output.
42	PC3/USART1_TX/ADC1_IN5/COMP1_INP/COMP2_INM	bidirectional	GPIO port C3 (3.6V-tolerant TT I/O). Alternate functions: USART1 transmit, ADC1 input channel 5, Comparator 1 positive input, Comparator 2 negative input.
43	PC4/USART1_CK/I2C1_SMB/CCO/ADC1_IN4/COMP2_INM/COMP1_INP	bidirectional	GPIO port C4 (3.6V-tolerant TT I/O). Alternate functions: USART1 synchronous clock, I2C1 SMBus alert, configurable clock output (CCO), ADC1 input channel 4, Comparator 1/2 inputs.
44	PC5/OSC32_IN/[SPI1_NSS]/[USART1_TX]	bidirectional	GPIO port C5. Alternate functions: LSE 32.768 kHz crystal input, remappable SPI1 slave-select, remappable USART1 transmit.
45	PC6/OSC32_OUT/[SPI1_SCK]/[USART1_RX]	bidirectional	GPIO port C6. Alternate functions: LSE 32.768 kHz crystal output, remappable SPI1 clock, remappable USART1 receive.
46	PC7/ADC1_IN3/COMP2_INM/COMP1_INP	bidirectional	GPIO port C7 (3.6V-tolerant TT I/O). Alternate functions: ADC1 input channel 3, Comparator 2 negative input, Comparator 1 positive input.
47	PE6/PVD_IN	bidirectional	GPIO port E6 (3.6V-tolerant TT I/O). Alternate function: Programmable Voltage Detector (PVD) external input.
48	PE7	bidirectional	GPIO port E7 (3.6V-tolerant TT I/O). Standard high-sink push-pull / open-drain output; input floating / weak pull-up / external interrupt capable.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

STM8L151C6T3C4T3
STM8L151C6T3C4T6
STM8L151C6T3C4T7
STM8L151C6T3
STM8L151C6T3C6T6
STM8L151C6T3C6T7
STM8L151C6T3C4U3
STM8L151C6T3C4U6
STM8L151C6T3C4U7
STM8L151C6T3C6U3
STM8L151C6T3C6U6
STM8L151C6T3C6U7
STM8L151C6T3K4T3
STM8L151C6T3K4T6
STM8L151C6T3K4T7
STM8L151C6T3K6T3
STM8L151C6T3K6T6
STM8L151C6T3K6T7
STM8L151C6T3K4U3
STM8L151C6T3K4U6
STM8L151C6T3K4U7
STM8L151C6T3K6U3
STM8L151C6T3K6U6
STM8L151C6T3K6U7
STM8L151C6T3G4U3
STM8L151C6T3G4U6
STM8L151C6T3G4U7
STM8L151C6T3G6U3
STM8L151C6T3G6U6
STM8L151C6T3G6U7
STM8L151C6T3G4Y3
STM8L151C6T3G4Y6
STM8L151C6T3G4Y7
STM8L151C6T3G6Y3
STM8L151C6T3G6Y6
STM8L151C6T3G6Y7

CAD (KiCad official)

Symbol: STM8L151C6T3
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 (None pp, sha256 76f669f0972e887a, retrieved 2026-08-17, 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