STM8L052C6T6TR 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	Port A0. High-sink LED driver capable. Default alternate: [USART1 synchronous clock] / SWIM input-output / Beep output / Infrared Timer output. PA0 is in input pull-up during and after reset.
2	NRST/PA1	bidirectional	Reset input / general-purpose I/O PA1. Bidirectional reset pin with weak pull-up; can be reconfigured as PA1 GPIO (output-only) via option byte.
3	PA2/OSC_IN/[USART1_TX]/[SPI1_MISO]	bidirectional	Port A2. Default alternate: HSE oscillator input / [USART1 transmit] / [SPI1 MISO].
4	PA3/OSC_OUT/[USART1_RX]/[SPI1_MOSI]	bidirectional	Port A3. Default alternate: HSE oscillator output / [USART1 receive] / [SPI1 MOSI].
5	PA4/TIM2_BKIN/LCD_COM0/ADC1_IN2	bidirectional	Port A4. Default alternate: Timer 2 break input / LCD COM 0 / ADC1 input 2. 3.6 V tolerant.
6	PA5/TIM3_BKIN/LCD_COM1/ADC1_IN1	bidirectional	Port A5. Default alternate: Timer 3 break input / LCD COM 1 / ADC1 input 1. 3.6 V tolerant.
7	PA6/[ADC1_TRIG]/LCD_COM2/ADC1_IN0	bidirectional	Port A6. Default alternate: [ADC1 trigger] / LCD COM 2 / ADC1 input 0. 3.6 V tolerant.
8	PA7/LCD_SEG0	bidirectional	Port A7. Default alternate: LCD segment 0. Five-volt tolerant.
9	VSS1/VSSA/VREF-	power_in	Combined digital I/O ground, analog supply ground, and ADC1 negative voltage reference.
10	VDD1	power_in	Digital power supply. 1.8 V to 3.6 V.
11	VDDA	power_in	Analog supply voltage for ADC and internal reference. 1.8 V to 3.6 V.
12	VREF+	power_in	ADC1 positive voltage reference input.
13	VLCD	passive	LCD booster external capacitor pin (LCD variant). On non-LCD variants this pin is Reserved and must be tied to VDD.
14	PE0/LCD_SEG1	bidirectional	Port E0. Default alternate: LCD segment 1. Five-volt tolerant.
15	PE1/TIM1_CH2N/LCD_SEG2	bidirectional	Port E1. Default alternate: Timer 1 inverted channel 2 / LCD segment 2. 3.6 V tolerant.
16	PE2/TIM1_CH3N/LCD_SEG3	bidirectional	Port E2. Default alternate: Timer 1 inverted channel 3 / LCD segment 3. 3.6 V tolerant.
17	PE3/LCD_SEG4	bidirectional	Port E3. Default alternate: LCD segment 4. 3.6 V tolerant.
18	PE4/LCD_SEG5	bidirectional	Port E4. Default alternate: LCD segment 5. 3.6 V tolerant.
19	PE5/LCD_SEG6/ADC1_IN23	bidirectional	Port E5. Default alternate: LCD segment 6 / ADC1 input 23. 3.6 V tolerant.
20	PD0/TIM3_CH2/[ADC1_TRIG]/LCD_SEG7/ADC1_IN22	bidirectional	Port D0. Default alternate: Timer 3 channel 2 / [ADC1 trigger] / LCD segment 7 / ADC1 input 22. 3.6 V tolerant.
21	PD1/TIM3_ETR/LCD_COM3/ADC1_IN21	bidirectional	Port D1. Default alternate: Timer 3 external trigger / LCD COM 3 / ADC1 input 21. 3.6 V tolerant.
22	PD2/TIM1_CH1/LCD_SEG8/ADC1_IN20	bidirectional	Port D2. Default alternate: Timer 1 channel 1 / LCD segment 8 / ADC1 input 20. 3.6 V tolerant.
23	PD3/TIM1_ETR/LCD_SEG9/ADC1_IN19	bidirectional	Port D3. Default alternate: Timer 1 external trigger / LCD segment 9 / ADC1 input 19. 3.6 V tolerant.
24	PB0/TIM2_CH1/LCD_SEG10/ADC1_IN18	bidirectional	Port B0. Default alternate: Timer 2 channel 1 / LCD segment 10 / ADC1 input 18. 3.6 V tolerant. Pull-up applied during reset; input floating after reset release.
25	PB1/TIM3_CH1/LCD_SEG11/ADC1_IN17	bidirectional	Port B1. Default alternate: Timer 3 channel 1 / LCD segment 11 / ADC1 input 17. 3.6 V tolerant.
26	PB2/TIM2_CH2/LCD_SEG12/ADC1_IN16	bidirectional	Port B2. Default alternate: Timer 2 channel 2 / LCD segment 12 / ADC1 input 16. 3.6 V tolerant.
27	PB3/TIM2_ETR/LCD_SEG13/ADC1_IN15	bidirectional	Port B3. Default alternate: Timer 2 external trigger / LCD segment 13 / ADC1 input 15. 3.6 V tolerant.
28	PB4/[SPI1_NSS]/LCD_SEG14/ADC1_IN14	bidirectional	Port B4. Default alternate: [SPI1 master/slave select] / LCD segment 14 / ADC1 input 14. 3.6 V tolerant. Pull-up applied during reset; input floating after reset release.
29	PB5/[SPI1_SCK]/LCD_SEG15/ADC1_IN13	bidirectional	Port B5. Default alternate: [SPI1 clock] / LCD segment 15 / ADC1 input 13. 3.6 V tolerant.
30	PB6/[SPI1_MOSI]/LCD_SEG16/ADC1_IN12	bidirectional	Port B6. Default alternate: [SPI1 master out/slave in] / LCD segment 16 / ADC1 input 12. 3.6 V tolerant.
31	PB7/[SPI1_MISO]/LCD_SEG17/ADC1_IN11	bidirectional	Port B7. Default alternate: [SPI1 master in/slave out] / LCD segment 17 / ADC1 input 11. 3.6 V tolerant.
32	PF0/ADC1_IN24	bidirectional	Port F0. Default alternate: ADC1 input 24.
33	PD4/TIM1_CH2/LCD_SEG18/ADC1_IN10	bidirectional	Port D4. Default alternate: Timer 1 channel 2 / LCD segment 18 / ADC1 input 10. 3.6 V tolerant.
34	PD5/TIM1_CH3/LCD_SEG19/ADC1_IN9	bidirectional	Port D5. Default alternate: Timer 1 channel 3 / LCD segment 19 / ADC1 input 9. 3.6 V tolerant.
35	PD6/TIM1_BKIN/LCD_SEG20/ADC1_IN8/RTC_CALIB/VREFINT	bidirectional	Port D6. Default alternate: Timer 1 break input / LCD segment 20 / ADC1 input 8 / RTC calibration / Internal voltage reference output. 3.6 V tolerant.
36	PD7/TIM1_CH1N/LCD_SEG21/ADC1_IN7/RTC_ALARM/VREFINT	bidirectional	Port D7. Default alternate: Timer 1 inverted channel 1 / LCD segment 21 / ADC1 input 7 / RTC alarm / Internal voltage reference output. 3.6 V tolerant.
37	PC0/I2C1_SDA	bidirectional	Port C0 / I2C1 data (true open-drain output). Five-volt tolerant.
38	PC1/I2C1_SCL	bidirectional	Port C1 / I2C1 clock (true open-drain output). Five-volt tolerant.
39	VDD2	power_in	IOs supply voltage.
40	VSS2	power_in	IOs ground voltage.
41	PC2/USART1_RX/LCD_SEG22/ADC1_IN6/VREFINT	bidirectional	Port C2. Default alternate: USART1 receive / LCD segment 22 / ADC1 input 6 / Internal voltage reference output. 3.6 V tolerant.
42	PC3/USART1_TX/LCD_SEG23/ADC1_IN5	bidirectional	Port C3. Default alternate: USART1 transmit / LCD segment 23 / ADC1 input 5. 3.6 V tolerant.
43	PC4/USART1_CK/I2C1_SMB/CCO/LCD_SEG24/ADC1_IN4	bidirectional	Port C4. Default alternate: USART1 synchronous clock / I2C1 SMB / Configurable clock output / LCD segment 24 / ADC1 input 4. 3.6 V tolerant.
44	PC5/OSC32_IN/[SPI1_NSS]/[USART1_TX]	bidirectional	Port C5. Default alternate: LSE oscillator input / [SPI1 master/slave select] / [USART1 transmit].
45	PC6/OSC32_OUT/[SPI1_SCK]/[USART1_RX]	bidirectional	Port C6. Default alternate: LSE oscillator output / [SPI1 clock] / [USART1 receive].
46	PC7/LCD_SEG25/ADC1_IN3	bidirectional	Port C7. Default alternate: LCD segment 25 / ADC1 input 3. 3.6 V tolerant.
47	PE6/LCD_SEG26/PVD_IN	bidirectional	Port E6. Default alternate: LCD segment 26 / PVD external input. 3.6 V tolerant.
48	PE7/LCD_SEG27	bidirectional	Port E7. Default alternate: LCD segment 27. 3.6 V tolerant.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

STM8L052C6T6TR

CAD (KiCad official)

Symbol: STM8L052C6T6TR
Footprint: Package_QFP:LQFP-48_7x7mm_P0.5mm
3D model: LQFP-48(7x7) (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`stm8l052c6t6tr.step`	617 KB	You want the bare part, or you mark your own boards.
`stm8l052c6t6tr-etched.step`	4.9 MB	You want the part with `STM8L052C6T6TR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 1224 faces against 747 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

Datasheet: STMicroelectronics datasheet (103 pp, sha256 b0b463f58d51c7f5, 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