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STM32L052K8U3
Public Made by Adomby adom
STMicroelectronics Microcontrollers (MCU/MPU/SOC), UFQFPN-32(5x5). Pinout checked against ST's open pin data, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownSTM32L052K8U3
STMicroelectronics · Microcontrollers (MCU/MPU/SOC) · UFQFPN-32(5x5)
STM32L052K8U3 from STMicroelectronics, in a UFQFPN-32(5x5). 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 | VDD | power_in | MCU digital supply pin; the features list gives the device supply range as 1.65 V to 3.6 V. |
| 2 | PC14-OSC32_IN | bidirectional | 5 V tolerant FT I/O (PC14), also the 32 kHz LSE oscillator input OSC32_IN. |
| 3 | PC15-OSC32_OUT | bidirectional | Standard 3.3 V TC I/O (PC15), also the 32 kHz LSE oscillator output OSC32_OUT. |
| 4 | NRST | bidirectional | Bidirectional reset pin with an embedded weak pull-up resistor. |
| 5 | VDDA | power_in | Analog supply pin; the features list gives ADC operation down to 1.65 V and DAC operation down to 1.8 V. |
| 6 | PA0 | bidirectional | Standard 3.3 V TC I/O that also provides ADC_IN0, COMP1_INM6 and RTC_TAMP2/WKUP1, with alternate functions TIM2_CH1, USART2_CTS and COMP1_OUT. |
| 7 | PA1 | bidirectional | 5 V tolerant FT I/O that also provides ADC_IN1 and COMP1_INP, with alternate functions TIM2_CH2, USART2_RTS/USART2_DE and TIM21_ETR. |
| 8 | PA2 | bidirectional | 5 V tolerant FT I/O that also provides ADC_IN2 and COMP2_INM6, with alternate functions TIM21_CH1, TIM2_CH3, USART2_TX and COMP2_OUT. |
| 9 | PA3 | bidirectional | 5 V tolerant FT I/O that also provides ADC_IN3 and COMP2_INP, with alternate functions TIM21_CH2, TIM2_CH4 and USART2_RX. |
| 10 | PA4 | bidirectional | Standard 3.3 V TC I/O with reduced touch sensing sensitivity, recommended for use as a sampling capacitor I/O; also provides ADC_IN4 and DAC_OUT. |
| 11 | PA5 | bidirectional | Standard 3.3 V TC I/O that also provides ADC_IN5, with alternate functions SPI1_SCK, TIM2_ETR, TSC_G2_IO2 and TIM2_CH1. |
| 12 | PA6 | bidirectional | 5 V tolerant FT I/O that also provides ADC_IN6, with alternate functions SPI1_MISO, LPUART1_CTS, TIM22_CH1 and COMP1_OUT. |
| 13 | PA7 | bidirectional | 5 V tolerant FT I/O that also provides ADC_IN7, with alternate functions SPI1_MOSI, TIM22_CH2 and COMP2_OUT. |
| 14 | PB0 | bidirectional | 5 V tolerant FT I/O that also provides ADC_IN8 and VREF_OUT, with alternate functions EVENTOUT and TSC_G3_IO2. |
| 15 | PB1 | bidirectional | 5 V tolerant FT I/O that also provides ADC_IN9 and VREF_OUT, with alternate functions TSC_G3_IO3 and LPUART1_RTS/LPUART1_DE. |
| 16 | PB2 | bidirectional | 5 V tolerant FT I/O with alternate functions LPTIM1_OUT and TSC_G3_IO4. |
| 17 | VDD | power_in | MCU digital supply pin; the features list gives the device supply range as 1.65 V to 3.6 V. |
| 18 | PA8 | bidirectional | 5 V tolerant FT I/O with alternate functions MCO, USB_CRS_SYNC, EVENTOUT and USART1_CK. |
| 19 | PA9 | bidirectional | 5 V tolerant FT I/O with alternate functions MCO, TSC_G4_IO1 and USART1_TX. |
| 20 | PA10 | bidirectional | 5 V tolerant FT I/O with alternate functions TSC_G4_IO2 and USART1_RX. |
| 21 | PA11 | bidirectional | 5 V tolerant FT I/O powered by VDD_USB (table note 3), with additional function USB_DM and alternate functions SPI1_MISO, USART1_CTS and COMP1_OUT. |
| 22 | PA12 | bidirectional | 5 V tolerant FT I/O powered by VDD_USB (table note 3), with additional function USB_DP and alternate functions SPI1_MOSI, USART1_RTS/USART1_DE and COMP2_OUT. |
| 23 | PA13 | bidirectional | 5 V tolerant FT I/O with alternate functions SWDIO (serial wire debug data) and USB_NOE. |
| 24 | PA14 | bidirectional | 5 V tolerant FT I/O with alternate functions SWCLK (serial wire debug clock) and USART2_TX. |
| 25 | PA15 | bidirectional | 5 V tolerant FT I/O with alternate functions SPI1_NSS, TIM2_ETR, EVENTOUT, USART2_RX and TIM2_CH1. |
| 26 | PB3 | bidirectional | 5 V tolerant FT I/O with alternate functions SPI1_SCK, TIM2_CH2, TSC_G5_IO1 and EVENTOUT, and additional function COMP2_INN. |
| 27 | PB4 | bidirectional | 5 V tolerant FT I/O with alternate functions SPI1_MISO, EVENTOUT, TSC_G5_IO2 and TIM22_CH1, and additional function COMP2_INP. |
| 28 | PB5 | bidirectional | 5 V tolerant FT I/O with alternate functions SPI1_MOSI, LPTIM1_IN1, I2C1_SMBA and TIM22_CH2, and additional function COMP2_INP. |
| 29 | PB6 | bidirectional | 5 V tolerant FTf I/O (FM+ capable) with alternate functions USART1_TX, I2C1_SCL, LPTIM1_ETR and TSC_G5_IO3, and additional function COMP2_INP. |
| 30 | PB7 | bidirectional | 5 V tolerant FTf I/O (FM+ capable) with alternate functions USART1_RX, I2C1_SDA, LPTIM1_IN2 and TSC_G5_IO4, and additional functions COMP2_INP and PVD_IN. |
| 31 | BOOT0 | input | Dedicated BOOT0 pin (B structure) used for boot mode selection; the extracted text gives no level or timing limits for it. |
| 32 | PB8 | bidirectional | 5 V tolerant FTf I/O (FM+ capable) with alternate functions TSC_SYNC and I2C1_SCL. |
| 33 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | UFQFPN-32(5x5) |
| Category | Embedded Processors & Controllers |
| Pins | 33 |
CAD (KiCad official)
- Symbol:
STM32L052K8U3 - Footprint:
Package_DFN_QFN:UFQFPN-32-1EP_5x5mm_P0.5mm_EP3.5x3.5mm - 3D model: UFQFPN-32(5x5) (KiCad packages3D, STEP)
- 3D model files:
stm32l052k8u3-etched.step/stm32l052k8u3-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);stm32l052k8u3.step/stm32l052k8u3.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (150 pp, sha256
ccec04f26ebfb036, retrieved 2026-10-11, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-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).