STMicroelectronics STM32L476VET6

Overview

STM32L476VET6 from STMicroelectronics is an ultra-low-power Arm® Cortex®-M4 32-bit MCU with FPU, operating up to 80 MHz (100 DMIPS), featuring 512 KB 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 for battery-powered portable instrumentation.

For engineers reviewing the STM32L476VET6 datasheet, STM32L476VET6 pinout, STM32L476VET6 application, or STM32L476VET6 equivalent, key selection criteria include ultra-low-power operation across multiple sleep modes, dual-bank flash for seamless firmware updates, hardware parity on 32 KB SRAM, and 114 I/Os with 5 V tolerance - critical for industrial HMI, portable medical devices, and energy-harvesting sensor nodes.

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 includes three voltage scaling ranges (VOS0–VOS2), external SMPS interface (VDD12), and five low-power modes - Shutdown (30 nA), Stop 2 (1.1 µA), and Standby with RTC (420 nA).

Clock system comprises four independent sources: 4–48 MHz HSE, 32 kHz LSE for RTC, 16 MHz HSI (±1%), and auto-trimmed MSI (±0.25%). Three PLLs generate system, USB, and audio clocks; the RTC includes hardware calendar, alarms, and calibration - all accessible in Stop 2 mode via LPUART wake-up.

Key Specifications

Pinout & Package

LQFP100 package with exposed thermal pad; 100-pin square outline, 0.5 mm pitch, RoHS-compliant ECOPACK2 finish. Pin functions validated per STMicroelectronics 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 STM32L432KCU6, the STM32L476VET6 adds LCD, SMPS, and 32-bit timers for richer HMI and longer battery life; versus STM32L552RET6, it trades TrustZone for lower cost and proven maturity in volume production - ideal for non-security-critical industrial edge devices.

Availability

STM32L476VET6 is available at Aetrix Electronics and suitable for portable medical monitors, industrial HMI panels, smart utility meters, and energy-harvesting sensor nodes requiring stable component supply across multi-year product lifecycles.

Supply support for STM32L476VET6 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.

The STM32L4 series targets ultra-low-power embedded applications demanding extended battery life, rich analog integration, and robust real-time performance - optimized for portable, industrial, and IoT endpoints.

FAQ

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

The STM32L476VET6 achieves 80 MHz maximum core frequency using the HSE (4–48 MHz crystal) or MSI (auto-trimmed) clock source with PLL multiplication. It requires VOS0 voltage scaling (1.2 V regulator output) and external SMPS supply (VDD12 = 1.10 V) to sustain this speed while maintaining 39 µA/MHz efficiency. LDO-only operation limits max frequency to 64 MHz in VOS1 mode.

Does the device support true hardware-based firmware encryption or secure boot?

The STM32L476VET6 does not include TrustZone or dedicated cryptographic accelerators for AES/SHA. It provides a True Random Number Generator (TRNG), CRC unit, and readout protection (RDP) Level 2, but lacks hardware-enforced secure boot or encrypted flash. For certified security, ST recommends the STM32L5 series with ARM TrustZone and PKA.

Can the LCD controller drive a graphic TFT display?

No - the integrated LCD controller supports only static or multiplexed segment-type LCDs (up to 8×40 or 4×44), not pixel-addressable graphic TFTs. It includes built-in step-up converter and contrast control but lacks RGB interface, frame buffer, or TFT timing generators. For TFT displays, external controllers or higher-end STM32F7/H7 MCUs are required.

How many independent power domains does the chip support for mixed-voltage I/O operation?

The STM32L476VET6 supports two independent I/O voltage domains: VDD_IO (1.71–3.6 V) for standard GPIOs and VDD_USB (1.2 V) for USB transceiver. Additionally, up to 14 I/Os can be supplied by a separate VDDIO2 rail down to 1.08 V - enabling direct interfacing with 1.2 V, 1.8 V, and 3.3 V peripherals without level shifters.