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STM32 L1 Series

STM32 L1 series of ultra-low-power MCUs

ST’s ARM® Cortex®-M3-based STM32 L1 series uses ST’s proprietary ultra-low-leakage process technology with an innovative autonomous dynamic voltage scaling and 5 low-power modes offering unprecedented platform flexibility to fit any application. The STM32 L1 series extends the ultra-low-power concept with no compromise on performance.

As for the STM32 L0 and STM8 L, the STM32 L1 offers dynamic voltage scaling, an ultra-low-power clock oscillator, LCD interface, comparator, DAC and hardware encryption.

More than just ultra-low-power MCUs, the STM32 L1 series offers a wide portfolio of features, memory sizes and package pin counts. Combining ultra-low power and performance, the portfolio covers from 32 to 512 Kbytes of Flash memory (with up to 80 Kbytes of SDRAM and 16 Kbytes of true embedded EEPROM) and from 48 to 144 pins.

This innovative architecture (voltage scaling, ultra-low-power MSI oscillator) gives your design more performance for a very low power budget. The large number of embedded peripherals, such as USB, LCD interface, op amp, comparators, ADC with fast on/off mode, DAC, capacitive touch and AES, makes the STM32 L1 series an expandable platform to fit all your requirements.

The series is available in 4 different lines: STM32L100 Value line, STM32L151, STM32L152 (LCD), STM32L162 (LCD and AES-128).

To simplify migration and give you all the flexibility you need, the STM32 L1 is pin-to-pin compatible with the different STM32 F series and opens the door to the full STM32 ecosystem.

  • Ultra-low-power mode: 280 nA with backup registers (3 wakeup pins)
  • Ultra-low-power mode + RTC: 900 nA with backup registers (3 wakeup pins)
  • Low-power run mode: down to 9 μA
  • Dynamic run mode: down to 177 μA/MHz

New optimized STM32L1 MCUs for your new designs


Wondering what’s new with the STM32L1 with -A and -X suffixes MCUs?

Looking for more RAM memory and/or improved power consumption figures? Discover our new STM32L1 devices STM32L100x6/8/B-A,  STM32L15xx6/8/B-ASTM32L15xxD-X and STM32L162xD-X !

Pin-to-pin compatible with the existing MCUs, our migration guides will help you benefit from the new features and improved power consumption in dynamic and static states. More than ever, our large and market-proven STM32L1 portfolio helps you to release your creativity in designing battery-operated applications in healthcare, fitness, smart home, metering or industrial sectors​


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