Ultra-low-power ARM Cortex-M3 MCU with 256 Kbytes Flash, 32 MHz CPU, USB, 3xOp-amp

The ultra-low-power STM32L151xC and STM32L152xC devices incorporate the connectivity power of the universal serial bus (USB) with the high-performance ARM® Cortex®-M3 32-bit RISC core operating at a frequency of 32 MHz (33.3 DMIPS), a memory protection unit (MPU), high-speed embedded memories (Flash memory up to 256 Kbytes and RAM up to 32 Kbytes) and an extensive range of enhanced I/Os and peripherals connected to two APB buses.

The STM32L151xC and STM32L152xC devices offer two operational amplifiers, one 12-bit ADC, two DACs, two ultra-low-power comparators, one general-purpose 32-bit timer, six general-purpose 16-bit timers and two basic timers, which can be used as time bases.

Moreover, the STM32L151xC and STM32L152xC devices contain standard and advanced communication interfaces: up to two I2Cs, three SPIs, two I2S, three USARTs and an USB. The STM32L151xC and STM32L152xC devices offer up to 23 capacitive sensing channels to simply add a 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 STM32L151xC devices) has a built-in LCD voltage generator that allows to drive up to 8 multiplexed LCDs with the contrast independent of the supply voltage.

The ultra-low-power STM32L151xC and STM32L152xC 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. They are available in the -40 to +85 °C and -40 to +105 °C temperature ranges. 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 105 °C temperature range
    • 0.29µA Standby mode (3 wakeup pins)
    • 1.15 µA Standby mode + RTC
    • 0.44 µA Stop mode (16 wakeup lines)
    • 1.4 µA Stop mode + RTC
    • 8.6 µA Low-power run mode
    • 185 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
    • Low-power, ultrasafe 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
    • USB and USART supported
  • Development support
    • Serial wire debug supported
    • JTAG and trace supported
  • Up to 83 fast I/Os (70 I/Os 5V tolerant), all mappable on 16 external interrupt vectors
  • Memories
    • 256 Kbytes of Flash memory with ECC
    • 32 Kbytes of RAM
    • 8 Kbytes of true EEPROM with ECC
    • 128-byte backup register
  • LCD Driver (except STM32L151xC devices) up to 8x40 segments, contrast adjustment, blinking mode, step-up converter
  • Rich analog peripherals (down to 1.8 V)
    • 2x operational amplifiers
    • 12-bit ADC 1Msps up to 25 channels
    • 12-bit DAC 2 channels with output buffers
    • 2x ultra-low-power-comparators(window mode and wake up capability)
  • DMA controller 12x channels
  • 9x peripheral communication interfaces
    • 1x USB 2.0 (internal 48 MHz PLL)
    • 3x USARTs
    • Up to 8x SPIs (2x I2S, 3x 16 Mbit/s)
    • 2x I2Cs (SMBus/PMBus)
  • 11x timers: 1x 32-bit, 6x 16-bit with up to 4 IC/OC/PWM channels, 2x 16-bit basic timers, 2x watchdog timers (independent and window)
  • Up to 23 capacitive sensing channels
  • CRC calculation unit, 96-bit unique ID

Circuit Diagram

Resources

Technical Documentation

Product Specifications
Description Version Size
Ultra-low-power 32-bit MCU ARM®-based Cortex®-M3, 256KB Flash, 32KB SRAM, 8KB EEPROM, LCD, USB, ADC, DAC 13.0 2 MB
Application Notes
Description Version Size
Audio and waveform generation using the DAC in STM32 microcontrollers 3.0 816 KB
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
EMC design guide for ST microcontrollers 2.0 843 KB
ESD considerations for touch sensing applications on MCUs 2.0 353 KB
Electrostatic discharge sensitivity measurement 1.6 49 KB
Extending the DAC performance of STM32 microcontrollers 2.0 365 KB
General-purpose timer cookbook 2.0 1 MB
Getting started with STM32L1xxx hardware development 7.2 674 KB
Guidelines for designing touch sensing applications with surface sensors 3.0 1 MB
Guidelines to increase the number of touch sensing touchkeys 4.0 300 KB
Handling of soft errors in STM32 applications 2.1 410 KB
High-speed SI simulations using IBIS and board-level simulations using HyperLynx SI on STM32 32-bit ARM® Cortex® MCUs 1.1 2 MB
How to design a VBAT system based on STM32L0/L1 series (with external components) 1.0 293 KB
How to get the best ADC accuracy in STM32 microcontrollers 3.1 1 MB
How to implement a vocoder solution using STM32 microcontrollers 1.1 466 KB
Implications of memory interface configurations on low-power STM32 microcontrollers 2.0 435 KB
Managing memory protection unit (MPU) in STM32 MCUs 1.0 284 KB
Migrating between STM32L1 and STM32L0 series microcontrollers 1.0 639 KB
Migrating from STM32L1 Series to STM32L4 Series and STM32L4+ Series microcontrollers 5.0 1 MB
Migration and compatibility guidelines for STM32 microcontroller applications 3.1 127 KB
Migration of microcontroller applications from STM32F1 to STM32L1 series 2.1 312 KB
Oscillator design guide for STM8AF/AL/S and STM32 microcontrollers 11.0 2 MB
PDM audio software decoding on STM32 microcontrollers 1.3 90 KB
Proprietary Code Read Out Protection on STM32L1 microcontrollers 1.1 284 KB
STM32 USART automatic baud rate detection 1.0 268 KB
STM32 cross-series timer overview 6.0 555 KB
STM32 microcontroller debug toolbox 2.0 5 MB
STM32 microcontroller system memory boot mode 31.0 3 MB
STM32 proprietary code protection overview 1.1 60 KB
STM32Cube firmware examples for STM32L1 Series 4.0 575 KB
STM32L1xx ultralow power features overview 2.1 224 KB
Sampling capacitor selection guide for MCU based touch sensing applications 3.0 208 KB
Tuning a STMTouch-based application 3.0 783 KB
USART protocol used in the STM32 bootloader 7.0 617 KB
USB DFU protocol used in the STM32 bootloader 6.0 373 KB
Using STM32L1 analog comparators in application cases 3.1 317 KB
Using the hardware real-time clock (RTC) in STM32 F0, F2, F3, F4 and L1 series of MCUs 5.1 421 KB
Using the hardware real-time clock (RTC) in low-power modes with STM32 microcontrollers 3.0 1 MB
Virtually increasing the number of serial communication peripherals in STM32 applications 1.1 338 KB
Technical Notes & Articles
Description Version Size
Accurate power consumption estimation for STM32L1 series of ultra-low-power microcontrollers 2.1 343 KB
Description of WLCSP for microcontrollers and recommendations for its use 4.0 1 MB
How to use EWARM 6.2x with projects built with EWARM 6.1 and previous versions 1.2 97 KB
Migrating from STM32L15/6xRC-A to STM32L15/6xRC and from STM32L15/6xVC-A to STM32L15/6xVC 2.0 226 KB
STM32L Cortex-M3 microcontroller for usage in low-power healthcare applications 1.2 357 KB
Tape and reel shipping media for STM32 microcontrollers in BGA packages 2.1 745 KB
Tape and reel shipping media for STM8 and STM32 microcontrollers in FPN packages 3.0 753 KB
Tape and reel shipping media for STM8 and STM32 microcontrollers in QFP packages 3.0 830 KB
Tape and reel shipping media for STM8 and STM32 microcontrollers in SO packages 1.0 755 KB
Tape and reel shipping media for STM8 and STM32 microcontrollers in TSSOP and SSOP packages 1.0 743 KB
Reference Manuals
Description Version Size
STM32L100xx, STM32L151xx, STM32L152xx and STM32L162xx advanced ARM®-based 32-bit MCUs 15.0 12 MB
Programming Manuals
Description Version Size
STM32F10xxx/20xxx/21xxx/L1xxxx Cortex-M3 programming manual 5.1 4 MB
Errata Sheets
Description Version Size
STM32L100RC and STM32L15xxC ultra-low-power device limitations 6.0 488 KB

HW Model, CAD Libraries & SVD

HW Model, CAD Libraries & SVD
Description Version Size
STM32L1 Boundary Scan Description Language (BSDL) files 1.1 131 KB
STM32L1 CAD Symbol and Footprint files 1.0 573 KB
STM32L1 IBIS models 1.0 45 MB
STM32L1 System View Description 1.2 152 KB

Presentations & Training Material

Presentations
Description Version Size
Fire alarms and smoke detectors - Application guide 1.0 335 KB
STM32 - 32-bit ARM Cortex-M MCUs 3.0 1 MB
STM32 and STM8 Functional Safety Packages 2 1 MB
STM32L4+ MCU series - Excellence in ultra-low-power with more performance 1.0 1 MB
STM8L and STM32 L1 series - Ultra-low-power platform 2.0 789 KB

Publications and Collaterals

Flyers
Description Version Size
Get ready for the largest IoT development ecosystem 17.02 741 KB
STM32 Nucleo boards - Unified scalable offering 17.11 1 MB
STM32 for makers - Releasing your creativity 17.06 2 MB
Brochures
Description Version Size
STM32 32-bit MCU family - Leading supplier of ARM® Cortex®-M microcontrollers 17.10 2 MB
STM32L series - Ultra-low-power 32-bit MCUs 16.4 3 MB
Semiconductor solutions for healthcare applications 1.0 665 KB
Magazine Articles
Description Version Size
Design & Elektronik magazine - Benchmark ULPBench debunked 1.1 12 MB
White Papers
Description Version Size
STM32 More Than a Core - Circuit Cellar, Tom Cantrell 1.0 355 KB

Tools and Software

Development Tools
Hardware Development Tools
Software Development Tools
Embedded Software
Evaluation Tool Software
MCUs Embedded Software
Evaluation Tools
Product Evaluation Tools
Support & Community


Sample & Buy

Part Number Package Packing Type Operating Temperature (°C) (min) Operating Temperature (°C) (max) Marketing Status Unit Price (US$) * Quantity ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
STM32L151RCY6TR WLCSP 64 BALLS DIE 436 P 0.4 MM Tape And Reel -40 85 Active 2.81 10000 NEC 3A991A2 TAIWAN MORE INFO DISTRIBUTOR AVAILABILITY
STM32L151RCT6 LQFP 64 10x10x1.4 Tray -40 85 Active 2.59 10000 NEC 3A991A2 - MORE INFO DISTRIBUTOR AVAILABILITY
STM32L151RCT6TR LQFP 64 10x10x1.4 Tape And Reel -40 85 Active 2.59 10000 NEC 3A991A2 - MORE INFO No availability reported, please contact our Sales office
test

(*) 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

Quality & Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
STM32L151RCY6TR ActiveWLCSP 64 BALLS DIE 436 P 0.4 MMIndustrialEcopack2 0 0
STM32L151RCT6 ActiveLQFP 64 10x10x1.4IndustrialEcopack2 0 0
STM32L151RCT6TR ActiveLQFP 64 10x10x1.4IndustrialEcopack2 0 0
test

(**) 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.

×