Ultra-low-power ARM Cortex-M3 MCU with 32 Kbytes Flash, 32 MHz CPU, USB

The ultra-low-power STM32L151x6/8/B and STM32L152x6/8/B devices incorporate the connectivity power of the universal serial bus (USB) with the high-performance ARM®Cortex®-M3 32-bit RISC core operating at 32 MHz frequency (33.3 DMIPS), a memory protection unit (MPU), high-speed embedded memories (Flash memory up to 128 Kbytes and RAM up to 16 Kbytes) and an extensive range of enhanced I/Os and peripherals connected to two APB buses.

All the devices offer a 12-bit ADC, 2 DACs and 2 ultra-low-power comparators, six general-purpose 16-bit timers and two basic timers, which can be used as time bases.

Moreover, the STM32L151x6/8/B and STM32L152x6/8/B devices contain standard and advanced communication interfaces: up to two I2Cs and SPIs, three USARTs and a USB. The STM32L151x6/8/B and STM32L152x6/8/B devices offer up to 20 capacitive sensing channels to simply add touch sensing functionality to any application.

They also include a real-time clock and a set of backup registers that remain powered in Standby mode.

Finally, the integrated LCD controller (except STM32L151x6/8/B devices) has a built-in LCD voltage generator that allows to drive up to 8 multiplexed LCDs with contrast independent of the supply voltage.

The ultra-low-power STM32L151x6/8/B and STM32L152x6/8/B devices operate from a 1.8 to 3.6 V power supply (down to 1.65 V at power down) with BOR and from a 1.65 to 3.6 V power supply without BOR option. It is available in the -40 to +85 °C temperature range, extended to 105°C in low power dissipation state. A comprehensive set of power-saving modes allows the design of low-power applications.

Key Features

  • Ultra-low-power platform
    • 1.65 V to 3.6 V power supply
    • -40°C to 85°C/105°C temperature range
    • 0.3 μA Standby mode (3 wakeup pins)
    • 0.9 μA Standby mode + RTC
    • 0.57 μA Stop mode (16 wakeup lines)
    • 1.2 μA Stop mode + RTC
    • 9 μA Low-power run mode
    • 214 μA/MHz Run mode
    • 10 nA ultra-low I/O leakage
    • < 8 μs wakeup time
  • Core: ARM® Cortex® -M3 32-bit CPU
    • From 32 kHz up to 32 MHz max
    • 1.25 DMIPS/MHz (Dhrystone 2.1)
    • Memory protection unit
  • Reset and supply management
    • Ultra-safe, low-power BOR (brownout reset) with 5 selectable thresholds
    • Ultra-low-power POR/PDR
    • Programmable voltage detector (PVD)
  • Clock sources
    • 1 to 24 MHz crystal oscillator
    • 32 kHz oscillator for RTC with calibration
    • High Speed Internal 16 MHz factory-trimmed RC (+/- 1%)
    • Internal low-power 37 kHz RC
    • Internal multispeed low-power 65 kHz to 4.2 MHz
    • PLL for CPU clock and USB (48 MHz)
  • Pre-programmed bootloader
    • USART supported
  • Development support
    • Serial wire debug supported
    • JTAG and trace supported
  • Up to 83 fast I/Os (73 I/Os 5V tolerant), all mappable on 16 external interrupt vectors
  • Memories
    • Up to 128 Kbytes Flash memory with ECC
    • Up to 16 Kbytes RAM
    • Up to 4 Kbytes of true EEPROM with ECC
    • 80-byte backup register
  • LCD Driver (except STM32L151x/6/8/B devices) for up to 8x40 segments
    • Support contrast adjustment
    • Support blinking mode
    • Step-up converter on board
  • Rich analog peripherals (down to 1.8 V)
    • 12-bit ADC 1 Msps up to 24 channels
    • 12-bit DAC 2 channels with output buffers
    • 2x ultra-low-power-comparators(window mode and wake up capability)
  • DMA controller 7x channels
  • 8x peripheral communication interfaces
    • 1x USB 2.0 (internal 48 MHz PLL)
    • 3x USARTs (ISO 7816, IrDA)
    • 2x SPIs 16 Mbit/s
    • 2x I2Cs (SMBus/PMBus)
  • 10x timers: 6x 16-bit with up to 4 IC/OC/PWM channels, 2x 16-bit basic timers, 2x watchdog timers (independent and window)
  • Up to 20 capacitive sensing channels supporting touchkey, linear and rotary touch sensors
  • CRC calculation unit, 96-bit unique ID



Description バージョン サイズ
DS6876 DS6876: Ultra-low-power 32-bit MCU ARM®-based Cortex®-M3, 128KB Flash, 16KB SRAM, 4KB EEPROM, LCD, USB, ADC, DAC 12.0 2 MB
Description バージョン サイズ
AN4775 AN4775: Basics and low-cost solution proposals to move from legacy USB2.0 connector to USB Type-C™ connector with STM32 devices 1.0 443 KB
AN1709 AN1709: EMC design guide for ST microcontrollers 2.0 843 KB
AN3960 AN3960: ESD considerations for touch sensing applications on MCUs 2.0 353 KB
AN1181 AN1181: Electrostatic discharge sensitivity measurement 1.6 49 KB
AN4566 AN4566: Extending the DAC performance of STM32 microcontrollers 2.0 365 KB
AN4776 AN4776: General-purpose timer cookbook 1.0 1 MB
AN3216 AN3216: Getting started with STM32L1xxx hardware development 7.2 674 KB
AN4312 AN4312: Guidelines for designing touch sensing applications with surface sensors 2.0 1 MB
AN3236 AN3236: Guidelines to increase the number of touch sensing touchkeys 4.0 300 KB
AN4750 AN4750: Handling of soft errors in STM32 applications 2.1 410 KB
AN4803 AN4803: High-speed SI simulations using IBIS and board-level simulations using HyperLynx SI on STM32 32-bit ARM® Cortex® MCUs 1.1 2 MB
AN4718 AN4718: How to design a VBAT system based on STM32L0/L1 series (with external components) 1.0 293 KB
AN4229 AN4229: How to implement a vocoder solution using STM32 microcontrollers 1.0 466 KB
AN4777 AN4777: Implications of memory interface configurations on low-power STM32 microcontrollers 2.0 435 KB
AN4838 AN4838: Managing memory protection unit (MPU) in STM32 MCUs 1.0 284 KB
AN4654 AN4654: Migrating between STM32L1 and STM32L0 series microcontrollers 1.0 639 KB
AN4612 AN4612: Migrating from STM32L1 Series to STM32L4 Series microcontrollers 4.0 1 MB
AN3422 AN3422: Migration of microcontroller applications from STM32F1 to STM32L1 series 2.1 312 KB
AN2867 AN2867: Oscillator design guide for STM8S, STM8A and STM32 microcontrollers 10.0 2 MB
AN4908 AN4908: STM32 USART automatic baud rate detection 1.0 268 KB
AN4013 AN4013: STM32 cross-series timer overview 6.0 555 KB
AN2606 AN2606: STM32 microcontroller system memory boot mode 29.0 3 MB
AN3429 AN3429: STM32 proprietary code protection overview 1.1 60 KB
AN4706 AN4706: STM32Cube firmware examples for STM32L1 Series 2.0 468 KB
AN3193 AN3193: STM32L1xx ultralow power features overview 2.1 224 KB
AN4310 AN4310: Sampling capacitor selection guide for MCU based touch sensing applications 3.0 208 KB
AN4316 AN4316: Tuning a STMTouch-based application 3.0 783 KB
AN3155 AN3155: USART protocol used in the STM32 bootloader 7.0 617 KB
AN3248 AN3248: Using STM32L1 analog comparators in application cases 3.1 317 KB
AN3371 AN3371: Using the hardware real-time clock (RTC) in STM32 F0, F2, F3, F4 and L1 series of MCUs 5.1 421 KB
AN4759 AN4759: Using the hardware real-time clock (RTC) in low-power modes with STM32 microcontrollers 2.0 1 MB
AN4655 AN4655: Virtually increasing the number of serial communication peripherals in STM32 applications 1.1 338 KB
Technical Notes & Articles
Description バージョン サイズ
TA0342 TA0342: Accurate power consumption estimation for STM32L1 series of ultra-low-power microcontrollers 2.1 343 KB
TN1163 TN1163: Description of WLCSP for microcontrollers and recommendations for its use 4.0 1 MB
TN0830 TN0830: How to use EWARM 6.2x with projects built with EWARM 6.1 and previous versions 1.2 97 KB
TN1176 TN1176: Migrating from STM32L15xx6/8/B to STM32L15xx6/8/B-A and from STM32L100x6/8/B to STM32L100x6/8/B-A 1.0 264 KB
TA0340 TA0340: STM32L Cortex-M3 microcontroller for usage in low-power healthcare applications 1.2 357 KB
TN1204 TN1204: Tape and reel shipping media for STM32 microcontrollers in BGA packages 2.1 745 KB
TN1205 TN1205: Tape and reel shipping media for STM8 and STM32 microcontrollers in FPN packages 3.0 753 KB
TN1206 TN1206: Tape and reel shipping media for STM8 and STM32 microcontrollers in QFP packages 3.0 830 KB
TN1207 TN1207: Tape and reel shipping media for STM8 and STM32 microcontrollers in SO packages 1.0 755 KB
TN1208 TN1208: Tape and reel shipping media for STM8 and STM32 microcontrollers in TSSOP and SSOP packages 1.0 743 KB
Description バージョン サイズ
RM0038 RM0038: STM32L100xx, STM32L151xx, STM32L152xx and STM32L162xx advanced ARM®-based 32-bit MCUs 14.0 17 MB
Description バージョン サイズ
PM0056 PM0056: STM32F10xxx/20xxx/21xxx/L1xxxx Cortex-M3 programming manual 5.1 4 MB
Errata Sheets
Description バージョン サイズ
ES0125 ES0125: STM32L100x6/8/B, STM32L151x6/8/B and STM32L152x6/8/B ultra-low-power device limitations 14.0 508 KB

HW Model & CAD Libraries

HW Model & CAD Libraries
Description バージョン サイズ
STM32L1 Boundary Scan Description Language (BSDL) files 1.1 131 KB
STM32L1 CAD Symbol and Footprint files 573 KB
STM32L1 IBIS models 1.0 45 MB

プレゼンテーション & トレーニング資料

Description バージョン サイズ
Fire alarms and smoke detectors - Application guide 1.0 335 KB
STM32 - 32-bit ARM Cortex-M MCUs 3.0 1 MB
STM32 Embedded Software overview 2.3.0 777 KB
STM32 and STM8 Functional Safety Packages 2 1 MB
STM32 and STM8 embedded software solutions 2.0 2 MB
STM32ファミリ開発環境のご紹介 1.0 2 MB
STM8L and STM32 L1 series - Ultra-low-power platform 2.0 789 KB

Publications and Collaterals

Description バージョン サイズ
Get ready for the largest IoT development ecosystem 17.02 356 KB
STM32 Nucleo boards 16.12 869 KB
STM32 for makers Releasing your creativity 16.09 333 KB
Description バージョン サイズ
STM32 32-bit MCU family - Leading supplier of ARM® Cortex®-M microcontrollers 16.12 1 MB
STM32L series - Ultra-low-power 32-bit MCUs 16.03 1 MB
Description バージョン サイズ
STM32 More Than a Core - Circuit Cellar, Tom Cantrell 1.0 355 KB

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サンプル & 購入

製品型番 パッケージ Packing Type Operating Temperature (°C) (min) Operating Temperature (°C) (max) Marketing Status Unit Price (US$) * 数量 ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
STM32L151C6U6TR UFQFPN 48 7x7x0.55 Tape And Reel -40 85 NRND - - NEC 3A991A2 CHINA MORE INFO

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

品質 & 信頼性

製品型番 Marketing Status パッケージ Grade RoHS Compliance Grade Material Declaration**
STM32L151C6U6 NRNDUFQFPN 48 7x7x0.55IndustrialEcopack2
STM32L151C6U6TR NRNDUFQFPN 48 7x7x0.55IndustrialEcopack2
STM32L151C6T6 NRNDLQFP 48 7x7x1.4IndustrialEcopack2 0 0
STM32L151C6T6TR NRNDLQFP 48 7x7x1.4IndustrialEcopack2 0 0

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.