STMicroelectronics STM32L471RGT6

Overview

STM32L471RGT6 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. It supports advanced low-power modes (e.g., 420 nA Standby with RTC) and is deployed in battery-powered industrial sensors and portable medical devices requiring long runtime and mixed-signal processing.

For engineers reviewing the STM32L471RGT6 datasheet, STM32L471RGT6 pinout, STM32L471RGT6 application, or STM32L471RGT6 equivalent, key selection considerations include its FlexPowerControl architecture, dual-bank read-while-write Flash, hardware parity-protected SRAM, and support for SAIs, CAN 2.0B, and LPUART wake-up from Stop 2 mode.

Technical Context

The STM32L471RGT6 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 voltage scaling ranges and five low-power modes-Shutdown (30 nA), Standby (120 nA), Stop 2 (1.1 µA), and VBAT mode (300 nA)-with hardware calendar RTC and 5 wakeup pins.

It features three independent analog domains: one for ADC/DAC/OPAMP/COMP (1.62–3.6 V), one for TSC (1.62–3.6 V), and one for VREFBUF (1.2–3.6 V). Clocking includes four PLLs (system, audio, ADC, SAI), auto-trimmed MSI (±0.25%), and external crystal support up to 48 MHz.

Key Specifications

Pinout & Package

LQFP144 package (20 × 20 mm, 0.5 mm pitch), RoHS-compliant and ECOPACK2® certified, with exposed thermal pad for enhanced thermal dissipation in high-duty-cycle embedded applications.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-power Cortex-M4 MCU applications.

Compared with STM32L433RCT6, the STM32L471RGT6 offers double Flash/SRAM and audio/external memory interfaces at modest cost premium; versus STM32L552RET6, it trades TrustZone security for lower active power and broader analog integration-ideal for non-certified but power-critical edge nodes.

Availability

STM32L471RGT6 is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical monitors, industrial predictive maintenance edge nodes, and smart energy metering modules requiring stable component supply across multi-year production cycles.

Supply support for STM32L471RGT6 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 analog components for industrial, automotive, and consumer markets.

The STM32L4 series targets ultra-low-power embedded applications demanding high performance-per-microwatt, combining Cortex-M4 efficiency with ST's proprietary power management IP-including FlexPowerControl and ART Accelerator-to serve battery-constrained IoT and portable equipment.

FAQ

What is the maximum operating frequency and corresponding performance metric?

The STM32L471RGT6 operates at up to 80 MHz, delivering 100 DMIPS (Dhrystone 2.1) and 273.55 CoreMark® (3.42 CoreMark/MHz). This performance is sustained via the ART Accelerator™, which eliminates Flash wait states, and is validated under full voltage scaling (VOS0) with all peripherals enabled and cache active.

How does the dual-bank Flash architecture support firmware updates?

Dual-bank Flash enables Read-While-Write (RWW) operation: while the application runs from Bank 1, new firmware can be written to Bank 2. A controlled bank swap-triggered by software or reset-allows seamless, atomic firmware updates without halting real-time operation, critical for remote or safety-critical deployments.

Which low-power modes support RTC operation and wake-up capability?

RTC remains active in Standby mode (420 nA), Stop 0/1/2 modes (1.1–2.3 µA), and VBAT mode (300 nA). Wake-up from Stop 2 is supported via LPUART, EXTI lines, RTC alarm, or tamper events; Standby wake-up uses RTC alarm, WKUP pins, or external reset-ensuring precise time-triggered autonomy.

What analog supply configurations are required for simultaneous ADC and OPAMP use?

VDDA must be supplied at 1.62–3.6 V and decoupled with ≥1 µF ceramic capacitor; VREF+ (internal or external) sets ADC reference; OPAMPs require VDDA and optionally VREF+ for rail-to-rail output. The TSC domain (VDDTSC) is separate and must be ≥1.62 V if capacitive sensing is used concurrently.