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

The ultra-low-power STM32L151x6/8/B-A and STM32L152x6/8/B-A 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 128 Kbytes and RAM up to 32 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-A and STM32L152x6/8/B-A devices contain standard and advanced communication interfaces: up to two I2Cs and SPIs, three USARTs and a USB. The STM32L151x6/8/B-A and STM32L152x6/8/B-A devices offer up to 20 capacitive sensing channels to simply add touch sensing functionality to any application.

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

Finally, the integrated LCD controller (except STM32L151x6/8/B-A 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-A and STM32L152x6/8/B-A 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
    • 0.28 μA Standby mode (3 wakeup pins)
    • 1.11 μA Standby mode + RTC
    • 0.44 μA Stop mode (16 wakeup lines)
    • 1.38 μA Stop mode + RTC
    • 10.9 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
    • 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 memory with ECC
    • Up to 32 KB RAM
    • Up to 4 KB of true EEPROM with ECC
    • 80 Byte backup register
  • LCD Driver (except STM32L151x6/8/B-A 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 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

bd_stm32l1xxxxb_128k.jpg

Design

Publications and Collaterals

Flyers
Description Version Size
Get ready for the largest IoT development ecosystem 17.02 741 KB
STM32 GUI solutions - Advanced HMI now achievable on embedded systems 1.0 1 MB
STM32 Nucleo boards 18.0 1 MB
STM32 for makers Releasing your creativity 16.09 1 MB
Brochures
Description Version Size
STM32™ 32-bit MCU family - Leading supplier of ARM® Cortex®-M microcontrollers 18.0 1 MB
STM32L series - Ultra-low-power 32-bit MCUs 16.4 3 MB
White Papers
Description Version Size
STM32 More Than a Core - Circuit Cellar, Tom Cantrell 1.0 355 KB

HW Model & CAD Libraries

HW Model & CAD Libraries
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

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 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
STM8L and STM32 L1 series - Ultra-low-power platform 2.0 789 KB

Technical Documentation

Product Specifications
Description Version Size
DS9515 DS9515: Ultra-low-power 32-bit MCU ARM®-based Cortex®-M3, 128KB Flash, 32KB SRAM, 4KB EEPROM, LCD, USB, ADC, DAC 4.0 1 MB
Technical Notes & Articles
Description Version Size
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 1.1 264 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
Reference Manuals
Description Version Size
RM0038 RM0038: STM32L100xx, STM32L151xx, STM32L152xx and STM32L162xx advanced ARM®-based 32-bit MCUs 14.0 12 MB
Programming Manuals
Description Version Size
PM0056 PM0056: STM32F10xxx/20xxx/21xxx/L1xxxx Cortex-M3 programming manual 5.1 4 MB
Errata Sheets
Description Version Size
ES0224 ES0224: STM32L100x6/8/B-A STM32L151x6/8/B-A and STM32L152x6/8/B-A ultra-low-power device limitations 8.0 434 KB

Tools and Software

Development Tools
Embedded Software
Evaluation Tools
Hardware Development Tools
Software Development Tools
Evaluation Tool Software
MCUs Embedded Software
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
STM32L152CBT6A LQFP 48 7x7x1.4 Tray -40 85 Active 2.191 10000 NEC 3A991A2 CHINA MORE INFO DISTRIBUTOR AVAILABILITY
STM32L152CBU6A UFQFPN 48 7x7x0.55 Tray -40 85 Active 2.191 10000 NEC 3A991A2 CHINA MORE INFO DISTRIBUTOR AVAILABILITY
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(*) 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**
STM32L152CBT6A ActiveLQFP 48 7x7x1.4IndustrialEcopack2
STM32L152CBU6A ActiveUFQFPN 48 7x7x0.55IndustrialEcopack2
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(**) 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.

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