STMicroelectronics STM32L476VGT3

Overview

STM32L476VGT3 from STMicroelectronics is an ultra-low-power Arm® Cortex®-M4 32-bit MCU with FPU, delivering 100 DMIPS at 80 MHz, featuring 1 MB flash, 128 KB SRAM, USB OTG FS, integrated LCD controller, and external SMPS support. It targets battery-powered industrial sensors, portable medical devices, and smart metering systems requiring long runtime and rich peripheral integration.

For engineers reviewing the STM32L476VGT3 datasheet, STM32L476VGT3 pinout, STM32L476VGT3 application, or STM32L476VGT3 equivalent, key selection criteria include its 39 µA/MHz SMPS-enabled run mode, dual 12-bit DACs with sample-and-hold, 3× 12-bit ADCs (5 Msps), 2× op-amps with PGA, and 14-channel DMA - all in a 100-pin LQFP package rated for -40 °C to 105 °C operation.

Technical Context

The STM32L476VGT3 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 (1.4 µA with RTC) and Shutdown (30 nA), with hardware calendar RTC and VBAT backup for persistent timekeeping.

It features three independent clock domains: system (up to 80 MHz via PLL), USB/audio (48 MHz), and ADC (up to 36 MHz), each with dedicated PLLs and multiple internal/external sources (4–48 MHz HSE, 32 kHz LSE, 16 MHz RC ±1%). The analog subsystem includes two operational amplifiers with programmable gain, two ultra-low-power comparators, and four digital filters for sigma-delta modulators - all with independent supply domains.

Key Specifications

Pinout & Package

LQFP100 package: 14 × 14 mm body, 0.5 mm pitch, exposed thermal pad (EP), RoHS-compliant, ECOPACK2 certified. Pin count: 100 leads, with 87 GPIOs (most 5 V-tolerant), 14 I/Os supporting independent 1.08–3.6 V supply.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L433RCT6, the STM32L476VGT3 adds LCD, USB OTG, and extended temperature range at higher power efficiency in SMPS mode; versus STM32L562VEQ6, it trades TrustZone and crypto accelerators for lower active current and integrated display support - making it optimal for non-secure, display-rich, battery-constrained edge devices.

Availability

STM32L476VGT3 is available at Aetrix Electronics and suitable for wearable health monitors, smart gas meters, industrial wireless sensor nodes, and portable diagnostic devices requiring stable component supply across multi-year production cycles.

Supply support for STM32L476VGT3 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 management ICs, sensors, and automotive semiconductors since 1987.

The STM32L4 series targets ultra-low-power embedded applications demanding high performance-per-milliwatt, featuring advanced power gating, flexible voltage scaling, and integrated analog peripherals for sensor-centric designs.

FAQ

What is the maximum operating frequency and corresponding power supply configuration for STM32L476VGT3?

The STM32L476VGT3 achieves 80 MHz maximum CPU frequency using the internal PLL driven by the 4–48 MHz HSE or auto-trimmed MSI oscillator. It requires VDD ≥ 2.4 V for full-speed operation in LDO mode; with external SMPS supplying VDD12 = 1.10 V, it maintains 80 MHz while reducing active current to 39 µA/MHz - verified per DS10198 Rev 11 Table 28.

Does STM32L476VGT3 support hardware-based cryptographic acceleration?

No, the STM32L476VGT3 does not include dedicated cryptographic accelerators (AES, PKA, HASH). It provides a true random number generator (RNG) and CRC calculation unit, but symmetric/asymmetric encryption must be implemented in software. For hardware crypto, consider the STM32L5 or STM32U5 series, which integrate AES-256, PKA, and secure key storage.

Can the internal LCD controller drive segment-based displays without external components?

Yes, the integrated LCD controller supports 8×40 or 4×44 static/dynamic segment drives with an on-chip step-up converter, eliminating the need for external bias generators or charge pumps. It operates from a single 3.3 V supply and includes contrast control, blinking, and hardware cursor management - confirmed in Section 3.21 of DS10198 Rev 11.

What debug interfaces are supported, and is JTAG fully available on the LQFP100 package?

The STM32L476VGT3 supports Serial Wire Debug (SWD) and JTAG via the SWJ-DP interface. On the LQFP100 package, all five SWJ-DP pins (SWCLK, SWDIO, NRST, SWO, JTCK) are accessible; JTMS and JTDO share pins with GPIOs but are enabled by default at reset. Full JTAG boundary-scan is supported, though SWD is recommended for lower pin count and faster programming.