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ARM MCU, ARM Cortex-M4 Microcontrollers, ARM Cortex-M4, 32bit, 80 MHz, 512 KB, 160 KB

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Brands: STMicroelectronics, Inc

Mfr.Part #: STM32L452RET6P

Datasheet: STM32L452RET6P Datasheet (PDF)

Package/Case: 64-LQFP

Product Type: Embedded Processors & Controllers

RoHS Status:

Stock Condition: 2012 pcs, New Original

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STM32L452RET6P General Description

The STM32L452xx devices are ultra-low-power microcontrollers based on the high-performance Arm®Cortex®-M4 32-bit RISC core operating at a frequency of up to 80 MHz. The Cortex-M4 core features a Floating point unit (FPU) single precision that supports all Arm®single-precision data-processing instructions and data types. It also implements a full set of DSP instructions and a memory protection unit (MPU) which enhances application security.The STM32L452xx devices embed high-speed memories (Flash memory up to 512 Kbyte, 160 Kbyte of SRAM), a Quad SPI Flash memories interface (available on all packages) and an extensive range of enhanced I/Os and peripherals connected to two APB buses, two AHB buses and a 32-bit multi-AHB bus matrix.The STM32L452xx devices embed several protection mechanisms for embedded Flash memory and SRAM: readout protection, write protection, proprietary code readout protection and Firewall.The devices offer a fast 12-bit ADC (5 Msps), two comparators, one operational amplifier, one DAC channel, an internal voltage reference buffer, a low-power RTC, one general-purpose 32-bit timer, one 16-bit PWM timer dedicated to motor control, four general-purpose 16-bit timers, and two 16-bit low-power timers.In addition, up to 21 capacitive sensing channels are available.They also feature standard and advanced communication interfaces, namely four I2Cs, three SPIs, three USARTs, one UART and one Low-Power UART, one SAI, one SDMMC, one CAN, one USB full-speed device crystal less.The STM32L452xx operates in the -40 to +85 °C (+105 °C junction) and -40 to +125 °C (+130 °C junction) temperature ranges from a 1.71 to 3.6 V VDDpower supply when using internal LDO regulator and a 1.05 to 1.32V VDD12power supply when using external SMPS supply. A comprehensive set of power-saving modes makes possible the design of low-power applications.Some independent power supplies are supported: analog independent supply input for ADC, DAC, OPAMP and comparators. A VBAT input makes it possible to backup the RTC and backup registers. Dedicated VDD12power supplies can be used to bypass the internal LDO regulator when connected to an external SMPS.The STM32L452xx family offers seven packages from 48 to 100-pin packages.ST-LINK/V2 in-circuit debugger/programmer for ST.STM32 Nucleo-64 development board with STM32L452.Evaluation board with STM32L476ZG MCU.LTE Cellular to Cloud Pack with STM32L496AG MCU.STM32 Nucleo-64 development board with STM32L452.



  • Ultra-low-power with FlexPowerControl
    • 1.71 V to 3.6 V power supply
    • -40 °C to 85/125 °C temperature range
    • 145 nA in VBAT mode: supply for RTC and 32x32-bit backup registers
    • 22 nA Shutdown mode (5 wakeup pins)
    • 106 nA Standby mode (5 wakeup pins)
    • 375 nA Standby mode with RTC
    • 2.05 µA Stop 2 mode, 2.40 µA with RTC
    • 84 µA/MHz run mode (LDO Mode)
    • 36 μA/MHz run mode (@3.3 V SMPS Mode)
    • Batch acquisition mode (BAM)
    • 4 µs wakeup from Stop mode
    • Brown out reset (BOR)
    • Interconnect matrix
  • Core: Arm® 32-bit Cortex®-M4 CPU with FPU, Adaptive real-time accelerator (ART Accelerator™) allowing 0-wait-state execution from Flash memory, frequency up to 80 MHz, MPU, 100DMIPS and DSP instructions
  • Performance benchmark
    • 1.25 DMIPS/MHz (Drystone 2.1)
    • 273.55 CoreMark® (3.42 CoreMark/MHz @ 80 MHz)
  • Energy benchmark
    • 335 ULPMark™ CP score
    • 104 ULPMark™ PP score
  • Clock Sources
    • 4 to 48 MHz crystal oscillator
    • 32 kHz crystal oscillator for RTC (LSE)
    • Internal 16 MHz factory-trimmed RC (±1%)
    • Internal low-power 32 kHz RC (±5%)
    • Internal multispeed 100 kHz to 48 MHz oscillator, auto-trimmed by LSE (better than ±0.25 % accuracy)
    • Internal 48 MHz with clock recovery
    • 2 PLLs for system clock, audio, ADC
  • Up to 83 fast I/Os, most 5 V-tolerant
  • RTC with HW calendar, alarms and calibration
  • Up to 21 capacitive sensing channels: support touchkey, linear and rotary touch sensors
  • 12x timers: 1x 16-bit advanced motor-control, 1x 32-bit and 3x 16-bit general purpose, 2x 16-bit basic, 2x low-power 16-bit timers (available in Stop mode), 2x watchdogs, SysTick timer
  • Memories
    • Up to 512 KB single bank Flash, proprietary code readout protection
    • 160 KB of SRAM inc


Parameter Value Parameter Value
Pin Count 64 Package Category Quad Flat Packages
Released Date Feb 11, 2021


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Datasheet PDF

Preliminary Specification STM32L452RET6P PDF Download

Key points

  • The STM32L452RET6P chip is a microcontroller based on the ARM Cortex-M4 core, designed for low-power applications. It features a 32-bit CPU, high-performance peripherals, and low-power modes to optimize energy efficiency. The chip is part of the STM32L4 series and offers a wide range of connectivity options, along with advanced security features. It is suitable for various applications including IoT devices, wearable technology, and battery-powered systems.
  • Equivalent

    There are a few equivalent products to the STM32L452RET6P chip, such as STMicroelectronics' STM32L452RBT6P and STM32L452RCT6P. These chips belong to the same family and have similar features and specifications.
  • Features

    Some features of the STM32L452RET6P microcontroller include: - ARM Cortex-M4 core with 80 MHz clock frequency - 256 KB flash memory and 64 KB SRAM - Multiple communication interfaces, including UART, I2C, SPI, and USB - Low power consumption with power-down, sleep, and stop modes - Analog peripherals for ADC, DAC, and Op-amps - Integrated security features and hardware cryptographic acceleration.
  • Pinout

    The STM32L452RET6P has 64 pins. It is based on the Arm Cortex-M4 core and operates at a maximum frequency of 80 MHz. The microcontroller offers various peripherals such as UART, SPI, I2C, timers, and GPIO, enabling a wide range of functions and connectivity options.
  • Manufacturer

    STMicroelectronics is the manufacturer of the STM32L452RET6P microcontroller. It is a global semiconductor company that designs, develops, and produces a broad range of integrated circuits and solutions for various industries, including automotive, consumer electronics, industrial automation, and more.
  • Application Field

    The STM32L452RET6P microcontroller is commonly used in various applications such as low-power and battery-powered devices, consumer electronics, industrial control systems, Internet of Things (IoT) devices, and portable medical devices.
  • Package

    The STM32L452RET6P chip is available in a LQFP package (Low-profile Quad Flat Package), with a size of 64 pins. Its form factor is rectangular and it measures approximately 10mm x 10mm.

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