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STM32L053R8T6

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STMicroelectronics Microcontrollers (MCU/MPU/SOC), LQFP-64(10x10). Pinout checked against ST's open pin data, KiCad symbol/footprint/3D.

componentembedded processors & controllersstm32l053r8t6factory-2.0.0extractor-text
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3D Model

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Symbol & Footprint

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Contents

README

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STM32L053R8T6

STMicroelectronics · Microcontrollers (MCU/MPU/SOC) · LQFP-64(10x10)

STM32L053R8T6 from STMicroelectronics, in a LQFP-64(10x10). 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 voltage supply output for internal step-up converter, 0 to 3.6 V.
2 PC13 bidirectional GPIO Port C bit 13, 5V tolerant, can function as RTC tamper/timestamp/wakeup or general purpose I/O.
3 PC14-OSC32_IN bidirectional GPIO Port C bit 14 or 32 kHz oscillator input (OSC32_IN), 5V tolerant, requires 32.768 kHz crystal connection.
4 PC15-OSC32_OUT bidirectional GPIO Port C bit 15 or 32 kHz oscillator output (OSC32_OUT), standard 3.3V I/O.
5 PH0-OSC_IN bidirectional GPIO Port H bit 0 or high-speed oscillator input (OSC_IN), standard 3.3V I/O, accepts 1-25 MHz external clock.
6 PH1-OSC_OUT bidirectional GPIO Port H bit 1 or high-speed oscillator output (OSC_OUT), standard 3.3V I/O, supplies oscillator feedback to crystal.
7 NRST bidirectional System reset pin with embedded weak pull-up resistor (30-60 kΩ), bidirectional with input filtering, active low reset trigger.
8 PC0 bidirectional GPIO Port C bit 0, 5V tolerant, can function as LCD segment, LPTIM input, or ADC_IN10 analog input.
9 PC1 bidirectional GPIO Port C bit 1, 5V tolerant, can function as LCD segment, LPTIM output, or ADC_IN11 analog input.
10 PC2 bidirectional GPIO Port C bit 2, 5V tolerant, can function as LCD segment, SPI2/I2S2 interface, or ADC_IN12 analog input.
11 PC3 bidirectional GPIO Port C bit 3, 5V tolerant, can function as LCD segment, SPI2/I2S2 interface, or ADC_IN13 analog input.
12 VSSA power_out Analog ground for ADC, DAC, and analog peripherals; must be connected to VSS.
13 VDDA power_in Analog power supply for ADC, DAC, and comparators, 1.8-3.6 V with DAC or 1.65-3.6 V without DAC.
14 PA0 bidirectional GPIO Port A bit 0, standard 3.3V I/O, can function as ADC_IN0, RTC wakeup, comparator input, or timer channel.
15 PA1 bidirectional GPIO Port A bit 1, 5V tolerant, can function as ADC_IN1, LCD segment, or timer channel.
16 PA2 bidirectional GPIO Port A bit 2, 5V tolerant, can function as ADC_IN2, USART2_TX, LCD segment, or timer channel.
17 PA3 bidirectional GPIO Port A bit 3, 5V tolerant, can function as ADC_IN3, USART2_RX, LCD segment, or timer channel.
18 VSS power_out Ground (digital), 0 V reference for all digital and analog circuits.
19 VDD power_in Main positive power supply, 1.65-3.6 V recommended range for stable operation.
20 PA4 bidirectional GPIO Port A bit 4, standard 3.3V I/O with reduced touch sensing sensitivity, can function as ADC_IN4, DAC_OUT, SPI1_NSS, or timer.
21 PA5 bidirectional GPIO Port A bit 5, standard 3.3V I/O, can function as ADC_IN5, SPI1_SCK, comparator input, or timer channel.
22 PA6 bidirectional GPIO Port A bit 6, 5V tolerant, can function as ADC_IN6, SPI1_MISO, LCD segment, or timer channel.
23 PA7 bidirectional GPIO Port A bit 7, 5V tolerant, can function as ADC_IN7, SPI1_MOSI, LCD segment, or timer channel.
24 PC4 bidirectional GPIO Port C bit 4, 5V tolerant, can function as ADC_IN14, LCD segment, or LPUART1_TX.
25 PC5 bidirectional GPIO Port C bit 5, 5V tolerant, can function as ADC_IN15, LCD segment, or LPUART1_RX.
26 PB0 bidirectional GPIO Port B bit 0, 5V tolerant, can function as ADC_IN8, LCD segment, or VREF_OUT buffer output.
27 PB1 bidirectional GPIO Port B bit 1, 5V tolerant, can function as ADC_IN9, LCD segment, or VREF_OUT buffer output.
28 PB2 bidirectional GPIO Port B bit 2, 5V tolerant, can function as LPTIM output or LCD voltage monitoring (VLCD1).
29 PB10 bidirectional GPIO Port B bit 10, 5V tolerant, can function as LCD segment, I2C2_SCL, SPI2_SCK, or LPUART1_TX.
30 PB11 bidirectional GPIO Port B bit 11, 5V tolerant, can function as LCD segment, I2C2_SDA, LPUART1_RX, or timer channel.
31 VSS power_out Ground (digital), 0 V reference for all digital and analog circuits.
32 VDD power_in Main positive power supply, 1.65-3.6 V recommended range for stable operation.
33 PB12 bidirectional GPIO Port B bit 12, 5V tolerant, can function as LCD segment, I2C2_SMBA, SPI2_NSS/I2S2_WS, or LPUART1_RTS_DE.
34 PB13 bidirectional GPIO Port B bit 13, 5V tolerant with FM+ capability up to 1 Mbit/s, can function as I2C2_SCL, SPI2_SCK/I2S2_CK, or timer.
35 PB14 bidirectional GPIO Port B bit 14, 5V tolerant with FM+ capability up to 1 Mbit/s, can function as I2C2_SDA, SPI2_MISO/I2S2_MCK, or timer.
36 PB15 bidirectional GPIO Port B bit 15, 5V tolerant, can function as LCD segment, SPI2_MOSI/I2S2_SD, or RTC reference input.
37 PC6 bidirectional GPIO Port C bit 6, 5V tolerant, can function as LCD segment or timer channel output.
38 PC7 bidirectional GPIO Port C bit 7, 5V tolerant, can function as LCD segment or timer channel output.
39 PC8 bidirectional GPIO Port C bit 8, 5V tolerant, can function as LCD segment or timer external trigger input.
40 PC9 bidirectional GPIO Port C bit 9, 5V tolerant, can function as LCD segment, timer trigger, or USB_NOE output.
41 PA8 bidirectional GPIO Port A bit 8, 5V tolerant, can function as LCD common terminal, microcontroller clock output (MCO), USB_CRS_SYNC, or USART1_CK.
42 PA9 bidirectional GPIO Port A bit 9, 5V tolerant, can function as LCD common terminal, USART1_TX, or timer channel input.
43 PA10 bidirectional GPIO Port A bit 10, 5V tolerant, can function as LCD common terminal, USART1_RX, or timer channel input.
44 PA11 bidirectional GPIO Port A bit 11, 5V tolerant, supplied by VDD_USB, can function as USB_DM, SPI1_MISO, or USART1_CTS.
45 PA12 bidirectional GPIO Port A bit 12, 5V tolerant, supplied by VDD_USB, can function as USB_DP, SPI1_MOSI, or USART1_RTS_DE.
46 PA13 bidirectional GPIO Port A bit 13, 5V tolerant, reserved for SWDIO debug interface, can also function as USB_NOE output.
47 VSS power_out Ground (digital), 0 V reference for all digital and analog circuits.
48 VDD_USB power_in USB transceiver power supply, 3.0-3.6 V when USB used or 1.65-3.6 V when not used; supplies PA11, PA12.
49 PA14 bidirectional GPIO Port A bit 14, 5V tolerant, reserved for SWCLK debug interface, can also function as USART2_TX.
50 PA15 bidirectional GPIO Port A bit 15, 5V tolerant, can function as LCD segment, SPI1_NSS, timer trigger, or USART2_RX.
51 PC10 bidirectional GPIO Port C bit 10, 5V tolerant, can function as LCD common terminal or segment, or LPUART1_TX.
52 PC11 bidirectional GPIO Port C bit 11, 5V tolerant, can function as LCD common terminal or segment, or LPUART1_RX.
53 PC12 bidirectional GPIO Port C bit 12, 5V tolerant, can function as LCD common terminal or segment.
54 PD2 bidirectional GPIO Port D bit 2, 5V tolerant, can function as LCD common terminal or segment, or LPUART1_RTS_DE.
55 PB3 bidirectional GPIO Port B bit 3, 5V tolerant, can function as LCD segment, SPI1_SCK, timer channel, or comparator input.
56 PB4 bidirectional GPIO Port B bit 4, 5V tolerant, can function as LCD segment, SPI1_MISO, timer channel, or comparator input.
57 PB5 bidirectional GPIO Port B bit 5, 5V tolerant, can function as LCD segment, SPI1_MOSI, LPTIM input, I2C1_SMBA, or timer channel.
58 PB6 bidirectional GPIO Port B bit 6, 5V tolerant with FM+ capability up to 1 Mbit/s, can function as I2C1_SCL, USART1_TX, LPTIM trigger, or comparator input.
59 PB7 bidirectional GPIO Port B bit 7, 5V tolerant with FM+ capability up to 1 Mbit/s, can function as I2C1_SDA, USART1_RX, LPTIM input, or programmable voltage detector (PVD) input.
60 BOOT0 input Dedicated boot mode selection pin, input only, logic low for boot from Flash (normal), logic high for boot from System Memory.
61 PB8 bidirectional GPIO Port B bit 8, 5V tolerant with FM+ capability up to 1 Mbit/s, can function as I2C1_SCL, LCD segment, or touch sensor sync.
62 PB9 bidirectional GPIO Port B bit 9, 5V tolerant with FM+ capability up to 1 Mbit/s, can function as I2C1_SDA, LCD common terminal, SPI2_NSS/I2S2_WS, or general I/O.
63 VSS power_out Ground (digital), 0 V reference for all digital and analog circuits.
64 VDD power_in Main positive power supply, 1.65-3.6 V recommended range for stable operation.

Key specifications

Parameter Value
Manufacturer STMicroelectronics
Package LQFP-64(10x10)
Category Embedded Processors & Controllers
Pins 64

CAD (KiCad official)

  • Symbol: STM32L053R8T6
  • Footprint: Package_QFP:LQFP-64_10x10mm_P0.5mm
  • 3D model: LQFP-64(10x10) (KiCad packages3D, STEP)
  • 3D model files: stm32l053r8t6-etched.step / stm32l053r8t6-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); stm32l053r8t6.step / stm32l053r8t6.glb are the bare package body.

Provenance

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

  • Datasheet: STMicroelectronics datasheet (132 pp, sha256 cc8f095af9f42fa2, retrieved 2026-09-23, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.2, primary claude-haiku-4-5-20251001 (text), consensus claude-sonnet-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