STMicroelectronics STM32L476RGT3

Overview

STM32L476RGT3 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, USB OTG FS, LCD controller, and integrated SMPS support. It delivers 39 µA/MHz in SMPS-run mode, 420 nA Standby with RTC, and supports capacitive touch sensing - deployed in battery-powered medical wearables, portable industrial sensors, and smart utility meters.

For engineers reviewing the STM32L476RGT3 datasheet, STM32L476RGT3 pinout, STM32L476RGT3 application, or STM32L476RGT3 equivalent, key selection criteria include ultra-low-power mode timing behavior (e.g., 4 µs wakeup from Stop), dual-voltage I/O tolerance (5 V-tolerant on most pins), LCD 8×40 segment drive capability, and hardware-accelerated crypto-ready peripherals including true RNG and CRC unit.

Technical Context

This MCU integrates an Adaptive Real-time Accelerator (ART™) enabling zero-wait-state execution from flash at 80 MHz, alongside three independent PLLs for system, USB, and audio clock domains. Its FlexPowerControl architecture supports dynamic voltage scaling and multiple low-power modes - Shutdown (30 nA), Standby with RTC (420 nA), and Stop 2 (1.1 µA) - all validated across -40 °C to 105 °C.

The device features a full interconnect matrix for concurrent peripheral access, dual-bank flash with read-while-write capability, and independent analog supply domains for ADC/DAC/OPAMP/COMP. It includes 24 capacitive sensing channels, two 12-bit DACs with sample-and-hold, and two rail-to-rail op-amps with programmable gain amplifiers - all operable in low-power run and Stop modes.

Key Specifications

Pinout & Package

LQFP64 package: 64-pin plastic quad flat pack, 10 × 10 mm body, 0.5 mm lead pitch, ECOPACK2-compliant, with exposed thermal pad (not electrically connected). Pin 1 marked by dot or bevelled corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L433RCT6, the STM32L476RGT3 adds USB OTG, LCD, and extended temperature support - justifying its use in human-interface and industrial edge devices. Versus STM32U575ZIT6, it trades TrustZone and lower Stop current for mature toolchain support and integrated display capability.

Availability

STM32L476RGT3 is available at Aetrix Electronics and suitable for portable medical monitors, smart utility meters, industrial wireless sensor nodes, and energy harvesting remote controllers requiring stable component supply across long production lifecycles.

Supply support for STM32L476RGT3 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, designing and manufacturing microcontrollers, power management ICs, MEMS, and automotive semiconductors since 1987.

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

FAQ

What is the maximum operating frequency and core type of the STM32L476RGT3?

The STM32L476RGT3 features an Arm Cortex-M4 core with FPU, rated for up to 80 MHz operation delivering 100 DMIPS. It uses ST's ART Accelerator™ to achieve zero-wait-state execution from internal flash memory, enabling deterministic real-time performance without external memory.

Does the STM32L476RGT3 support external memory interfaces?

Yes - it includes a Flexible Static Memory Controller (FSMC) supporting SRAM, PSRAM, NOR, and NAND memories, plus a Quad-SPI interface for high-speed serial flash. These interfaces operate independently of the CPU via DMA, allowing background memory access during active computation.

What LCD capabilities does the STM32L476RGT3 provide?

The device integrates a segment LCD controller supporting up to 8 commons × 40 segments or 4 commons × 44 segments, with an on-chip step-up converter enabling direct drive from a single 2.2–3.6 V supply. This eliminates need for external LCD bias generators in portable HMI designs.

How many low-power modes does the STM32L476RGT3 support, and what are their typical currents?

It supports seven low-power modes: Shutdown (30 nA), Standby (120 nA), Standby+RTC (420 nA), Stop 2 (1.1 µA), Stop 2+RTC (1.4 µA), and Run modes down to 39 µA/MHz with SMPS. All modes retain SRAM content and register states except Shutdown, and wakeup latency ranges from 4 µs (Stop) to 10 µs (Standby).