STMicroelectronics STM32L452VET6

Overview

STM32L452VET6 from STMicroelectronics is an ultra-low-power Arm® Cortex®-M4 32-bit MCU with FPU, operating up to 80 MHz (100 DMIPS), featuring 512 KB Flash, 160 KB SRAM, and integrated analog peripherals including 12-bit ADC (5 Msps), dual 12-bit DACs, op-amp with PGA, and ultra-low-power comparators. It supports external SMPS for 36 µA/MHz run efficiency and targets battery-powered IoT sensors, portable medical devices, and energy-harvesting edge nodes.

For engineers reviewing the STM32L452VET6 datasheet, STM32L452VET6 pinout, STM32L452VET6 application, or STM32L452VET6 equivalent, key selection criteria include verified ultra-low-power modes (22 nA Shutdown, 375 nA Standby with RTC), LQFP100 package compatibility, USB 2.0 full-speed crystal-less operation, and hardware-accelerated cryptographic support via TRNG and CRC unit.

Technical Context

The STM32L452VET6 implements an Adaptive Real-time Accelerator (ART Accelerator™) enabling zero-wait-state execution from Flash at 80 MHz, paired with a Memory Protection Unit (MPU) and interconnect matrix for deterministic peripheral arbitration. Its power architecture integrates dual voltage regulators (LDO and SMPS interface), supporting dynamic voltage scaling and Batch Acquisition Mode (BAM) for sensor hub duty-cycled operation.

Clock system includes two PLLs (system and audio), internal multispeed oscillator auto-trimmed by LSE (±0.25%), and dedicated clock recovery for USB. Analog subsystem features independent supply domains, hardware oversampling (up to 16-bit), and calibrated VREFINT/temperature sensor for precision measurement without external references.

Key Specifications

Pinout & Package

LQFP100 (14×14 mm, 0.5 mm pitch) package with 83 fast I/Os (most 5 V-tolerant), dedicated VDDA/VSSA analog supply pins, and separate VBAT input for RTC/backup registers.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-power MCU applications.

Compared with STM32L476VGT6 and STM32L552VET6, the STM32L452VET6 uniquely balances ultra-low-power operation (36 µA/MHz with SMPS), rich analog integration (OPAMP+PGA+DAC), and USB crystal-less capability-making it optimal for cost-sensitive, battery-limited edge nodes where security and GUI are secondary to energy efficiency.

Availability

STM32L452VET6 is available at Aetrix Electronics and suitable for wearable health monitors, smart utility meters, industrial wireless sensor nodes, and portable diagnostic devices requiring stable component supply across multi-year production cycles.

Supply support for STM32L452VET6 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, specializing in microcontrollers, power management, and analog/mixed-signal ICs for industrial, automotive, and consumer markets.

The STM32L4 series targets ultra-low-power embedded applications demanding high performance-per-milliwatt, with design focus on battery longevity, analog integration, and secure firmware execution in constrained environments.

FAQ

What is the maximum operating frequency and associated performance metric?

The STM32L452VET6 operates at up to 80 MHz with an ART Accelerator™ enabling zero-wait-state Flash execution. Its performance is quantified at 100 DMIPS (Dhrystone 2.1) and 273.55 CoreMark® (3.42 CoreMark/MHz), validated under conditions specified in DS11912 Rev 7 §3.1 and §6.3.5.

Does STM32L452VET6 support external SMPS, and what power savings does it deliver?

Yes, it supports external SMPS via dedicated VDD12 and VDD12_IO pins. In SMPS mode, active current drops to 36 µA/MHz at 3.3 V - a 57% reduction versus 84 µA/MHz in LDO mode - confirmed in DS11912 Rev 7 Table 28 and §3.9.3.

How many analog-to-digital converter channels does it provide, and what is its effective resolution?

It integrates one 12-bit ADC with up to 16 channels, capable of hardware oversampling to achieve up to 16-bit effective resolution at reduced sampling rates. The ADC delivers 5 Msps native throughput with 200 µA/Msps power efficiency, per DS11912 Rev 7 §3.15 and Table 6.3.18.

Which low-power modes retain RTC functionality, and what is their typical current draw?

Standby mode with RTC enabled draws 375 nA, while Stop 2 mode with RTC consumes 2.40 µA - both verified in DS11912 Rev 7 Table 4 and §3.9.4. These modes preserve calendar, alarms, and 32×32-bit backup registers using VBAT supply.