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STM32L051K8U6

Ultra-low-power Cortex-M0+ MCU, 64KB Flash, 8KB SRAM, 0.27uA standby, UFQFPN-32

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Manufacturer Part：

STM32L051K8U6

Package：

UFQFPN-32 (5.0 x 5.0 x 0.55 mm)

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Description

Product Overview

The STM32L051K8U6 from STMicroelectronics is an ultra-low-power ARM Cortex-M0+ MCU with 64KB Flash, 8KB SRAM, 12-bit ADC, and multiple low-power modes. Running at 32MHz in a 32-pin UFQFPN package, it targets battery-powered applications.

Key Specifications

Core ARM Cortex-M0+
Max Clock 32MHz
Flash Memory 64KB
SRAM 8KB
Supply Voltage 1.65V to 3.6V
ADC 12-bit, 10 channels
Standby Current 0.27uA (typ)
Operating Temperature -40 to 85 C

Features

  • Ultra-low-power Cortex-M0+ core at 32MHz
  • 0.27uA standby current with RTC
  • 64KB Flash with 8KB SRAM
  • 12-bit ADC with 10 input channels
  • Multiple low-power modes: Run, Sleep, Stop, Standby
  • Touch sensing controller
  • Multiple communication: SPI, I2C, USART
  • 16-bit timers with PWM

Applications

  • Battery-powered sensor nodes
  • Smart meters and metering
  • Wearable electronics
  • Building automation
  • Portable medical devices

The STM32L051K8U6 from STMicroelectronics is an ultra-low-power microcontroller based on the ARM Cortex-M0+ core, designed for battery-powered and energy-harvesting applications. Operating at up to 32MHz, it features 64KB of Flash and 8KB of SRAM. The device achieves an exceptionally low standby current of 0.27uA with RTC running, enabling years of battery life in always-on applications. Multiple low-power modes (Sleep, Low-Power Run, Low-Power Sleep, Stop with RTC, Standby) provide fine-grained power management. Peripherals include a 12-bit ADC with 10 channels, touch sensing controller, SPI, I2C, USART, and multiple 16-bit timers. The STM32L051K8U6 is available in a 32-pin UFQFPN package rated for -40 to 85 C.

The STM32L051K8U6 is based on the ARM Cortex-M0+ core optimized for ultra-low-power operation. Key subsystems include: (1) Cortex-M0+ Core – a 2-stage pipeline processor executing Thumb instruction set with single-cycle multiplier, optimized for low gate count and power; (2) Low-Power Modes – Run, Sleep, Low-Power Run (further reduced clock), Low-Power Sleep, Stop (with or without RTC), and Standby (0.27uA with RTC); (3) Voltage Regulator – an internal LDO with multiple range settings optimizes power consumption based on clock frequency; (4) 12-bit ADC – successive approximation ADC with autonomous operation in Stop mode; (5) Touch Sensing – capacitive touch acquisition using the ADC with hardware support for touch detection; (6) Clock System – multiple clock sources including 32kHz LSE, 16MHz HSI, and 37kHz LSI for flexible power management.

Pin Name Type Function
1 VDD Power Power supply (1.65V to 3.6V)
2 PA0/WDG/RTC I/O Port A / Wakeup / ADC
3-10 PA1-PA8 I/O Port A / ADC / USART / SPI
11 NRST Input Reset (active low)
12 VSSA Power Analog ground
13 VDDA Power Analog supply
14-23 PA9-PB1 I/O Port A-B / I2C / Timers
24-32 PB2-PB12 I/O Port B / SPI / Touch
  • Battery-powered wireless sensor nodes with years of operation
  • Smart meters with ultra-low standby current and periodic measurement
  • Wearable electronics requiring small footprint and long battery life
  • Building automation sensors with touch interface
  • Portable medical devices with 12-bit ADC and low-power modes
Manufacturer Part Number Package Notes
STMicroelectronics STM32L051C8T6 LQFP-48 Same core, more GPIO
STMicroelectronics STM32L052K8U6 UFQFPN-32 With DAC and comparators
Silicon Labs EFM32ZG11F016FG-QFN24 QFN-24 Zero Gecko, 16KB Flash
Microchip SAML21J18B-AUT TQFP-64 Cortex-M0+, ultra-low-power
NXP LPC824M201JHI33 QFN-33 Cortex-M0+, low power
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Contact Information

Email: info@materialparts.com

Tel / WhatsApp: +86 13760382860

Service & Packaging

Materialparts is a professional electronic component supplier based in Shenzhen, China, with over 20 years of global trading experience. We integrate component procurement, quality inspection, technical support, customized packaging, and global delivery services to provide one-stop supply chain solutions. Our business covers industrial control, automotive electronics, consumer electronics, medical devices and other industries. We always adhere to genuine sources, stable supply and considerate after-sales service.

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Contact Information

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Email: info@materialparts.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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