STMicroelectronics STM32L471VET6

Overview

STM32L471VET6 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, 128 KB SRAM, and integrated analog peripherals including three 12-bit ADCs (5 Msps), two 12-bit DACs, two op-amps, and two ultra-low-power comparators. It supports advanced low-power modes (e.g., 420 nA Standby with RTC) and is deployed in battery-powered IoT sensor nodes requiring long runtime, secure firmware execution, and mixed-signal processing.

For engineers reviewing the STM32L471VET6 datasheet, STM32L471VET6 pinout, STM32L471VET6 application, or STM32L471VET6 equivalent, key selection criteria include verified ultra-low-power operation across temperature (–40 °C to 105 °C), dual-bank Flash for seamless firmware updates, hardware parity on 32 KB SRAM, and support for SAIs, CAN 2.0B, and LPUART wake-up from Stop 2 mode.

Technical Context

The device integrates an Adaptive Real-time Accelerator (ART Accelerator™) enabling zero-wait-state execution from Flash at 80 MHz, alongside a memory protection unit (MPU) and interconnect matrix for deterministic peripheral arbitration. Its power architecture includes three independent voltage regulators supporting dynamic voltage scaling and five distinct low-power modes - Shutdown (30 nA), Standby (120 nA), Stop 2 (1.1 µA), and VBAT mode (300 nA) - all with configurable wakeup sources.

Clock management employs four independent sources: HSE (4–48 MHz), LSE (32.768 kHz), HSI16 (±1%), and MSI (100 kHz–48 MHz, auto-trimmed by LSE). Three PLLs provide dedicated clock trees for system core, audio (SAI), and ADC domains, ensuring jitter-free timing for mixed-signal applications.

Key Specifications

Pinout & Package

LQFP100 package with 100 leads, 0.5 mm pitch, exposed thermal pad, RoHS-compliant and ECOPACK2® certified.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L432KCU6, the STM32L471VET6 adds CAN, dual SAI, and higher ADC throughput for industrial connectivity and audio; versus STM32L552RET6, it trades TrustZone security for lower active current and mature toolchain support - ideal for non-certified but power-constrained edge nodes.

Availability

STM32L471VET6 is available at Aetrix Electronics and suitable for smart metering, wearable medical devices, predictive maintenance sensors, and secure edge gateways requiring stable component supply across multi-year production cycles.

Supply support for STM32L471VET6 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 ICs, sensors, and automotive semiconductors since 1987.

The STM32L4 series targets ultra-low-power embedded applications demanding high performance-per-milliwatt, integrated analog, and robust security primitives - optimized for battery-operated IoT, portable medical, and industrial monitoring systems.

FAQ

What is the maximum operating frequency and corresponding DMIPS rating?

The STM32L471VET6 operates at up to 80 MHz with an ARM Cortex-M4 core featuring a Floating-Point Unit. Its performance is rated at 100 DMIPS (Dhrystone 2.1), validated at full speed with ART Accelerator enabled. This reflects deterministic execution of integer and floating-point workloads typical in motor control, sensor fusion, and audio preprocessing.

Does this MCU support true hardware encryption acceleration?

The STM32L471VET6 includes a true random number generator (RNG) and cyclic redundancy check (CRC) calculation unit, but lacks dedicated AES or PKA accelerators. Security relies on software libraries (e.g., Mbed TLS) leveraging the FPU and memory protection unit (MPU); for hardware crypto, consider the STM32L5 or STM32U5 series.

Which low-power mode offers the fastest wake-up time, and what is the latency?

Stop 2 mode provides the fastest wake-up latency at 4 µs, as specified in the DS10741 datasheet. This mode retains SRAM and register contents while disabling the main regulator, allowing rapid resumption of code execution from Flash or SRAM - critical for time-sensitive sensor sampling or interrupt-driven communication.

Can the internal op-amps be used to drive external loads directly?

Each integrated op-amp supports rail-to-rail output swing and can source/sink ±25 mA, but is intended for signal conditioning-not direct load driving. For driving external transducers or LEDs, use dedicated driver stages; the op-amps excel in sensor biasing, active filtering, and PGA configurations with gain up to 32×.