STMicroelectronics STM32L476VGT6U

Overview

STM32L476VGT6U 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 targets battery-powered IoT edge nodes requiring long runtime, real-time sensor fusion, and human interface (e.g., smart meter displays).

For engineers reviewing the STM32L476VGT6U datasheet, STM32L476VGT6U pinout, STM32L476VGT6U application, or STM32L476VGT6U equivalent, key selection criteria include its 39 µA/MHz SMPS-enabled run mode, 420 nA standby-with-RTC current, 24-channel capacitive touch sensing, and dual 12-bit DACs for analog output in portable HMI designs.

Technical Context

The device 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 arbitration. Its power architecture supports dual supply schemes: internal LDO or external SMPS, with dynamic voltage scaling across VOS0–VOS3 ranges.

Three PLLs independently feed system, USB, and audio clocks; the RTC includes hardware calendar, calibration, and tamper detection; and the LCD controller drives up to 8×40 segments with integrated step-up converter - all while maintaining sub-1µA low-power modes with selective peripheral retention.

Key Specifications

Pinout & Package

STM32L476VGT6U uses the LQFP100 (14 × 14 mm) package with 100 pins, lead-free and ECOPACK2-compliant. Pin functions are validated per ST's DS10198 Rev 11, 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 STM32L433RCT6, the STM32L476VGT6U adds LCD, SMPS, and double memory - justifying its use in display-rich, battery-constrained HMI. Versus STM32L552RET6, it trades security extensions for analog integration and lower active power - making it optimal for cost- and power-sensitive industrial edge nodes without formal security mandates.

Availability

STM32L476VGT6U is available at Aetrix Electronics and suitable for smart metering, portable medical instrumentation, industrial sensor nodes, and asset tracking beacons requiring stable component supply across multi-year production cycles.

Supply support for STM32L476VGT6U 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-microwatt, with emphasis on battery longevity, rich analog integration, and human-machine interface capabilities in constrained form factors.

FAQ

What is the maximum operating temperature range for STM32L476VGT6U?

The STM32L476VGT6U is qualified for industrial operation from –40 °C to +105 °C ambient temperature, as specified in DS10198 Rev 11 Section 6.3.1. This rating applies to the LQFP100 package variant and is validated under full peripheral enablement and SMPS operation.

Does STM32L476VGT6U support external quad-SPI flash memory?

Yes - it integrates a dedicated QUADSPI interface supporting octal DDR mode, with configurable latency and dummy cycles. The controller supports execute-in-place (XIP) from external flash, enabling code overlay and large firmware image storage beyond internal 1 MB flash capacity.

Can the LCD controller drive a 4×44 segment display without external components?

Yes - the integrated LCD controller includes a programmable step-up converter and internal charge pump, allowing direct drive of 4×44 static or multiplexed LCDs from a single 3.3 V supply. No external bias generator or voltage booster IC is required for standard segment glass.

Is USB OTG FS functionality available in low-power modes?

No - USB OTG FS requires the system clock (HSI48 or PLL) and full VDD supply; it is disabled in Stop, Standby, and Shutdown modes. However, the LPUART peripheral remains active in Stop2 mode and can wake the device to re-enable USB for scheduled data uploads.