Ultra-low-power Arm Cortex-M3 MCU with 512 Kbytes of Flash memory, 32 MHz CPU, USB, 2xOp-amp

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Parameter NameParameter Value
Supply Voltage Min Volt1.65
Supply Voltage Max Volt3.6
Operating Temp Min Celsius-40.0
Operating Temp Max Celsius85.0
CoreArm Cortex-M3
ECCN US3A991.a.2
Packing TypeTray
RoHs compliantEcopack2
Package NameLQFP 64 10x10x1.4 mm

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.

Key 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 capabilit