Product overview


The ultra-low-power STM32L151xE and STM32L152xE 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 512 Kbytes and RAM up to 80 Kbytes), and an extensive range of enhanced I/Os and peripherals connected to two APB buses.

The STM32L151xE and STM32L152xE 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 STM32L151xE and STM32L152xE devices contain standard and advanced communication interfaces: up to two I2Cs, three SPIs, two I2S, three USARTs, two UARTs and an USB. The STM32L151xE and STM32L152xE devices offer up to 34 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 STM32L151xE 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 STM32L151xE and STM32L152xE 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.

  • All features

    • Includes ST state-of-the-art patented technology
      • Ultra-low-power platform
        • 1.65 V to 3.6 V power supply
        • -40 °C to 105 °C temperature range
        • 290 nA Standby mode (3 wakeup pins)
        • 1.11 µA Standby mode + RTC
        • 560 nA Stop mode (16 wakeup lines)
        • 1.4 µA Stop mode + RTC
        • 11 µA Low-power run mode down to 4.6 µA in Low-power sleep mode
        • 195 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
      • Up to 34 capacitive sensing channels
      • CRC calculation unit, 96-bit unique ID
      • 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
        • Internal 16 MHz oscillator factory trimmed RC(+/-1%) with PLL option
        • Internal low-power 37 kHz oscillator
        • Internal multispeed low-power 65 kHz to 4.2 MHz oscillator
        • PLL for CPU clock and USB (48 MHz)
      • Pre-programmed bootloader
        • USB and USART supported
      • Up to 116 fast I/Os (102 I/Os 5V tolerant), all mappable on 16 external interrupt vectors
      • Memories
        • 512 Kbytes of Flash memory with ECC (with 2 banks of 256 Kbytes enabling RWW capability)
        • 80 Kbytes of RAM
        • 16 Kbytes of true EEPROM with ECC
        • 128-byte backup register
      • LCD driver (except STM32L151xE 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 1 Msps up to 40 channels
        • 12-bit DAC 2 ch with output buffers
        • 2x ultra-low-power comparators(window mode and wake up capability)
      • DMA controller 12x channels
      • 11x peripheral communication interfaces
        • 1x USB 2.0 (internal 48 MHz PLL)
        • 5x 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)
      • Development support: serial wire debug, JTAG and trace

Circuit Diagram

EDA Symbols, Footprints and 3D Models

STMicroelectronics - STM32L152RE

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Quality and Reliability

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