STMicroelectronics STM32L452VCT6

Overview

STM32L452VCT6 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 DAC, op-amp with PGA, and RTC with hardware calendar. It supports external SMPS for 36 µA/MHz run efficiency and targets battery-powered industrial sensors and portable medical devices.

For engineers reviewing the STM32L452VCT6 datasheet, STM32L452VCT6 pinout, STM32L452VCT6 application, or STM32L452VCT6 equivalent, key selection criteria include ultra-low-power mode current (22 nA shutdown), 83 GPIOs (most 5 V-tolerant), USB 2.0 full-speed crystal-less operation, SAI audio interface, and CAN 2.0B support - all in LQFP100 package.

Technical Context

The STM32L452VCT6 integrates an Adaptive Real-time Accelerator (ART™) enabling zero-wait-state execution from Flash at 80 MHz, alongside a memory protection unit (MPU) and interconnect matrix for deterministic peripheral access. Its power architecture includes dual voltage regulation paths: internal LDO and external SMPS input (VDD12), enabling dynamic voltage scaling between Run, Stop 2, and Standby modes.

Clock system comprises four independent sources: 4–48 MHz HSE, 32 kHz LSE for RTC, factory-trimmed 16 MHz HSI, and auto-calibrated multispeed MSI (±0.25%), plus two PLLs for system, audio, and ADC clocks. Analog subsystem features independent supply domain, hardware oversampling (up to 16-bit), and buffered 2.048 V/2.5 V reference.

Key Specifications

Pinout & Package

LQFP100 package with 100 leads, 0.5 mm pitch, exposed thermal pad, RoHS-compliant and ECOPACK2® certified. Pinout validated per STMicroelectronics DS11912 Rev 7, Section 4 "Pinouts and pin description".

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 STM32L452VCT6 uniquely balances audio (SAI), ultra-low-power analog (op-amp + DAC), and USB crystal-less operation in a mature, cost-optimized LQFP100 footprint - making it optimal for battery-constrained audio-sensing endpoints where security and GUI are secondary.

Availability

STM32L452VCT6 is available at Aetrix Electronics and suitable for wearable health monitors, smart utility meters, industrial wireless sensor nodes, and portable diagnostic instruments requiring stable component supply across multi-year production cycles.

Supply support for STM32L452VCT6 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, Switzerland, designing and manufacturing microcontrollers, power management ICs, sensors, and automotive semiconductors since 1987.

The STM32L4 series targets ultra-low-power embedded applications demanding high performance-per-milliwatt, extended battery life, and rich analog integration - especially in portable medical, IoT edge nodes, and energy metering.

FAQ

Does STM32L452VCT6 support crystal-less USB operation?

Yes. The device integrates a Clock Recovery System (CRS) that synchronizes the internal 48 MHz RC oscillator to USB SOF packets, enabling full-speed (12 Mbit/s) USB communication without an external crystal. This reduces BOM cost and PCB area while maintaining ±0.25% frequency accuracy required for USB compliance.

What is the maximum ADC sampling rate and effective resolution?

The 12-bit ADC achieves 5 Msps native rate. With hardware oversampling (up to 256×), it delivers up to 16-bit effective resolution at reduced throughput (e.g., 31.25 kSps at 16-bit). Power consumption is 200 µA per Msps, verified per DS11912 Section 6.3.18.

Can the op-amp drive external loads directly?

Yes. The integrated operational amplifier supports rail-to-rail output swing and can source/sink ±25 mA. It includes programmable gain (1–20×) via internal PGA and operates down to 1.71 V supply, enabling direct sensor signal conditioning without external amplifiers.

Is the LQFP100 package RoHS and REACH compliant?

Yes. The STM32L452VCT6 in LQFP100 packaging meets ECOPACK2® standards, which exceed RoHS and REACH requirements. It is lead-free, halogen-free, and qualified for industrial temperature range (-40 °C to +125 °C), as documented in ST's Package Information (DS11912 Section 7.1).