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Ultra-low-power ARM Cortex-M3 MCU with 128 Kbytes Flash, 32 MHz CPU, LCD, USB
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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 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 you 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.

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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 KB Flash with ECC
  • Up to 16 KB RAM
  • Up to 4 KB 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 peripherals communication interface
  • 1x USB 2.0 (internal 48 MHz PLL)
  • 3x USART (ISO 7816, IrDA)
  • 2x SPI 16 Mbits/s
  • 2x I2C (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

Circuit Diagram

Design Resources


Technical Documentation

Product Specifications

Description Version Size
DS6876: Ultra-low-power 32-bit MCU ARM®-based Cortex®-M3, 128KB Flash, 16KB SRAM, 4KB EEPROM, LCD, USB, ADC, DAC
11.0 2,064 KB

Application Notes

Description Version Size
AN1709: EMC design guide for ST microcontrollers
1.7 657 KB
AN2606: STM32 microcontroller system memory boot mode
23.0 2,768 KB
AN2869: Guidelines for designing touch sensing applications
6.1 977 KB
AN3193: STM32L1xx ultralow power features overview
2.0 234 KB
AN3248: Using STM32L1 analog comparators in application cases
3.0 318 KB
AN3364: Migration and compatibility guidelines for STM32 microcontroller applications
3.0 128 KB
AN3371: Using the hardware real-time clock (RTC) in STM32 F0, F2, F3, F4 and L1 series of MCUs
5.0 422 KB
AN3422: Migration of microcontroller applications from STM32F1 to STM32L1 series
2.0 312 KB
AN3429: STM32 proprietary code protection overview
1.1 60 KB
AN3998: PDM audio software decoding on STM32 microcontrollers
1.2 91 KB
AN4221: I2C protocol used in the STM32 bootloader
3.0 683 KB
AN4310: Sampling capacitor selection guide for MCU based touch sensing applications
2.0 175 KB
AN4316: Tuning a STMTouch-based application
2.0 1,178 KB
AN4566: Extending the DAC performance of STM32 microcontrollers
2.0 365 KB

Technical Notes & Articles

Description Version Size
TA0340: STM32L Cortex-M3 microcontroller for usage in low-power healthcare applications
1.0 358 KB
TA0342: Accurate power consumption estimation for STM32L1 series of ultra-low-power microcontrollers
2.0 343 KB
TN0830: How to use EWARM 6.2x with projects built with EWARM 6.1 and previous versions
1.1 97 KB
TN1176: Migrating from STM32L15xx6/8/B to STM32L15xx6/8/B-A and from STM32L100x6/8/B to STM32L100x6/8/B-A
1.0 265 KB

Reference Manual

Description Version Size
RM0038: STM32L100xx, STM32L151xx, STM32L152xx and STM32L162xx advanced ARM®-based 32-bit MCUs
13.0 13,779 KB

Errata Sheet

Description Version Size
ES0125: STM32L100x6/8/B, STM32L151x6/8/B and STM32L152x6/8/B ultra-low-power device limitations
12.0 415 KB

HW Model & CAD Libraries

HW Model & CAD Libraries

Description Version Size
STM32 Boundary Scan Description Language (BSDL) files
3.0.0 195 KB

Presentations & Training Material


Description Version Size
Fire alarms and smoke detectors - Application guide
1.0.0 336 KB
STM8L and STM32 L1 series - Ultra-low-power platform
790 KB

Related Tools and Software

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NUCLEO-L152RE STM32 Nucleo development board with STM32L152RET6 MCU, supports Arduino
32L1-TOUCH-LIB STM32L1 STMTouch touch-sensing library
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STSW-STM32007 Using the STM32F1x and STM32L1x DMA controller (AN2548)
STSW-STM32072 STM32L1 Discovery firmware package (RN0079)
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STSW-STM32002 Clock configuration tool for STM32L1xx microcontrollers (AN3309)
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STSW-STM32075 STM32L1xx in-application programming (IAP) using the USART (AN3310)
STM32-SafeSIL Functional safety package to achieve IEC 61508 Safety Integrity Level (SIL2/3) certification with STM32
STemWin Professional graphical stack library enabling the building up of Graphical User Interfaces (GUIs) (AN4323)
STM32-EXPERIMENT IAR Experiment! Kits for STM32 MCUs
STSW-STM32080 DfuSe USB device firmware upgrade STMicroelectronics extension: contains the demo GUI, debugging GUI, all sources files and the protocol layer (UM0412)
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STMPRIMER EvoPrimer components to build your own EvoPrimer for easy evaluation and development with STM32 and STM8 MCUs
STSW-STM32127 STM32F10xx, STM32F2xx, STM32F4xx and STM32L1xx I2C Communication peripheral application library (CPAL) (UM1029)
STSW-STM32022 The ADPCM algorithm in STM32F1xx and STM32L1xx microcontrollers
STSW-STM32121 STM32F10x, STM32L1xx and STM32F3xx USB full speed device library (UM0424)
STSW-STM32135 Playing audio file interfacing STM32L1xx microcontroller with an external I2S audio codec (AN4309)
STSW-STM32AN4187 Using CRC peripheral in STM32 family (AN4187)
STM32CubeL1 Embedded software for STM32 L1 series (HAL low level drivers, USB, File system, RTOS, Touch Sensing, Graphic - coming with examples running on ST boards: STM32 Nucleo, Discovery kits and Evaluation boards)
STM32-WMA/DEC Audio Engine WMA Decoder and Utilities
STVP ST Visual Programmer for programming ST7, STM8 and STM32
STSW-STM32102 STM32 Virtual COM Port Driver
SW4STM32 AC6 free multi-OS software development environment for STM32 MCUs
MULTI GreenHills integrated development and debug environment for embedded applications using C and C++
mikroBasicPRO MikroElektronika full-featured Basic compiler which makes STM32 development suitable for everyone
TrueSTUDIO The premier C/C++ development tool for STM32 development, with its unrivalled feature set and unprecedented integration
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STSW-STM32099 STM32 secure firmware upgrade (SFU) (AN4024)
ALTIA-GUI Altia DeepScreen for STM32: Graphical user interface (GUI)
WITT-RTOS Wittenstein OpenRTOS, commercial flavor of open source FreeRTOS
EXP-RTOS Express Logic ThreadX Real time operating system (RTOS)
TrueINSPECTOR A tool that detects potential coding issues at an early stage. The product performs static source code inspection and generates software metrics and code complexity measurements
TASKINGVX TASKING VX-toolset for ARM based on Altium's Viper C compiler technology
CoIDE CooCox CoIDE, a free and highly-integrated software development environment for ARM Cortex MCUs
STM32-PRIMER/LAB Raisonance complete EvoPrimer ready-to-use for STM32 standalone programmer & application monitor
EXP-TRACE Express Logic TraceX Graphical finetuning tool
STSW-STM32013 STM32F10xxx LCD glass driver firmware (AN2656)
STX-RLINK In-circuit debugger/programmer for STM8, ST7, STM32, STR7 and STR9 microcontrollers
WITT-RTOS-SAFE Wittenstein SafeRTOS, safety-certified flavor of open source FreeRTOS
MDK-ARM MDK-ARM software development environment for Cortex-M and Cortex-R based mcus
WEI-KNX Weinzierl KNX standard communication protocols for the STM32 ARM Cortex-M Microcontrollers families (KNX Stack)
STSW-STM32094 STM32 in-application programming over the I2C bus (AN3078)
IAR-EWARM IAR Integrated development environment and optimizing C/C++ compiler for ARM Cortex-M
iSYS-winIDEA iSYSTEM's complete software development and test solution for the STM32 and STM8 families
X-CUBE-IAP-USART STM32Cube in-application programming using the USART embedded software (AN4657)
X-CUBE-nRF51DRV STM32Cube nRF51 Bluetooth Low Energy (BLE) embedded software
iSYS-winIDEAOpen iSYSTEM's free unlimited software development platform for all STM32 Cortex-M based devices
STSW-STM32149 STM32 nRF51 Bluetooth Low Energy (BLE) embedded software
VisualTFT A standalone application used for rapid development of graphical user interfaces for TFT displays. Software generates code for STM32 MCUs. Code is fully compatible with mikroElektronika compilers mikroC, mikroBasic and mikroPascal
STSW-STM32028 STM32's ADC modes and their applications (AN3116)
STSW-STM32025 Managing the Driver Enable signal for RS-485 and IO-Link communications with the STM32 USART
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mikroPascalPRO MikroElektronika full-featured Pascal compiler for STM32 devices. It has an intuitive IDE with docking support, rich with features, advanced text editor, many available tools, libraries and examples
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CrossWorks Rowley Associates CrossWorks, integrated development environment with JTAG Flash download and debug
EXP-TCP Express Logic NetX and NetX Duo TCP/IP stacks
EXP-USB Express Logic USBX USB stack
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EXP-FILE Express Logic FileX file system
TrueANALYSER A tool that performs advanced test quality measurements. The product performs dynamic execution flow analysis and provides rigorous code coverage measurements.
FREE-RTOS FreeRTOS Real Time Operating System for STM32 ARM Cortex-M Microcontrollers families
TrueVERIFIER Tool for advanced test automation. The product performs source code analysis and auto-generate unit tests that exercise an extensive set of different execution paths
X-CUBE-SMBUS STM32Cube SMBus/PMBus embedded software (AN4502)
ORYX-SSL Oryx CycloneSSL lightweight SSL/TLS implementation
ORYX-TCP Oryx CycloneTCP TCP/IP stack (IPv4, IPv6)
WITT-MW Wittenstein Middleware components (USB, File System, TCP/IP, ...)
Hitop5 Universal user interface, IDE and debugger for all Hitex development tools
emtas-CANopen CANopen Protocol Stack for STM32
STSW-STM32103 STM32 Serial Wire Viewer (SWV) and Embedded Trace Macrocell (ETM)capabilities. Examples and technical note.
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Publications and Collaterals


Description Version Size
Semiconductor solutions for healthcare applications
1.0 665 KB

Sample & Buy

Part Number Marketing StatusPackagePacking TypeOperating Temperature (min) Operating Temperature (max) Order From STUnit Price (US$)*
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
STM32L152RBH6ActiveTFBGA 64 5x5x1.2Tray-4085-Distributor reported inventory date: 2015-10-13
Distributor NameRegionStockMin. order
ARROWOrder NowAMERICA37203840
Farnell Element14Order NowEUROPE61
STM32L152RBT6ActiveLQFP 64 10x10x1.4Tray-4085-Distributor reported inventory date: 2015-10-13
Distributor NameRegionStockMin. order

(*) 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
(**) The Material Declaration forms available on 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.
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