STMicroelectronics STM32L471ZGT6

Overview

STM32L471ZGT6 from STMicroelectronics is an ultra-low-power Arm® Cortex®-M4 32-bit MCU with FPU, operating up to 80 MHz (100 DMIPS), featuring 1 MB 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 - deployed in battery-powered industrial sensors and portable medical monitors.

For engineers reviewing the STM32L471ZGT6 datasheet, STM32L471ZGT6 pinout, STM32L471ZGT6 application, or STM32L471ZGT6 equivalent, key selection criteria include verified low-power mode current (420 nA Standby with RTC), dual-bank Flash read-while-write capability, UFBGA144 package pin compatibility, and hardware-accelerated cryptographic support via TRNG and CRC unit.

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 FlexPowerControl architecture supports seven low-power modes - including Stop 2 (1.1 µA) and Shutdown (30 nA) - with sub-µA wake-up latency (4 µs from Stop).

Clock system includes three PLLs (system/audio/ADC), four independent clock sources (HSE/LSE/HSI16/MSI), and auto-trimmed MSI oscillator (±0.25% accuracy). Analog subsystem features independent VDDA supply, hardware oversampling (up to 16-bit), and capacitive sensing controller supporting 24 channels.

Key Specifications

Pinout & Package

STM32L471ZGT6 is housed in a 144-pin Ultra-Fine-Pitch Ball Grid Array (UFBGA144) package with 0.8 mm ball pitch and 10 mm × 10 mm body size, optimized for automated assembly and thermal performance in high-density PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L433RCT6, STM32L471ZGT6 offers double Flash/SRAM and audio-ready peripherals at modest cost premium; versus STM32L552RET6, it trades TrustZone security for lower active power and proven low-power runtime - ideal for battery longevity over cryptographic enforcement.

Availability

STM32L471ZGT6 is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical monitors, smart utility meters, and audio-enabled IoT gateways requiring stable component supply across long-lifecycle deployments.

Supply support for STM32L471ZGT6 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, sensors, and automotive ICs with strong focus on energy efficiency and industrial reliability.

The STM32L4 series targets ultra-low-power embedded applications demanding extended battery life, rich analog integration, and robust real-time performance - designed specifically for IoT edge nodes, portable healthcare, and smart infrastructure.

FAQ

What is the maximum operating frequency and corresponding performance metric of the STM32L471ZGT6?

The STM32L471ZGT6 operates at up to 80 MHz using its Arm Cortex-M4 core with FPU, delivering 100 DMIPS and 273.55 CoreMark® (3.42 CoreMark/MHz). This performance level is sustained with zero wait states thanks to the ART Accelerator™, enabling deterministic execution of real-time control and signal processing tasks directly from Flash memory.

Does the STM32L471ZGT6 support true hardware-based cryptographic functions?

The STM32L471ZGT6 includes a True Random Number Generator (TRNG) and CRC calculation unit, but lacks dedicated AES/TDES accelerators or public-key cryptography engines. It supports software-based crypto libraries (e.g., Mbed TLS) and secure boot via readout protection (ROP) and PCROP, meeting basic security requirements - though not PSA Certified like later L5-series devices.

Which low-power modes retain RTC functionality and how much current do they consume?

Standby mode with RTC enabled consumes 420 nA, while Stop 2 mode with RTC draws 1.4 µA. Both preserve RTC calendar, alarms, and 32×32-bit backup registers. VBAT mode (300 nA) maintains RTC and backup registers during main power loss - all three modes support wake-up via RTC alarm, tamper event, or external interrupt.

Can the STM32L471ZGT6 interface directly with external Quad SPI flash memory?

Yes - the STM32L471ZGT6 integrates a dedicated QUADSPI memory interface supporting octal and quad SPI protocols, enabling direct XIP (execute-in-place) operation from external flash. It supports single/dual/quad I/O modes, configurable dummy cycles, and memory-mapped addressing - eliminating need for external glue logic in memory expansion designs.