STMicroelectronics STM32L4Q5VGT6

Overview

STM32L4Q5VGT6 from STMicroelectronics is an ultra-low-power Arm® Cortex®-M4 32-bit MCU with FPU, 120 MHz max frequency, 1-MB Flash, 320-KB SRAM, and integrated LCD-TFT controller, AES+PKA cryptographic accelerators, and external SMPS support - deployed in battery-powered medical sensors and portable HMI displays.

For engineers reviewing the STM32L4Q5VGT6 datasheet, STM32L4Q5VGT6 pinout, STM32L4Q5VGT6 application, or STM32L4Q5VGT6 equivalent, key selection criteria include verified 190 nA Standby-with-RTC current, dual-bank read-while-write Flash architecture, 136 GPIOs (most 5 V-tolerant), and hardware parity on 64 KB of SRAM for functional safety compliance.

Technical Context

The device implements an adaptive real-time accelerator (ART) enabling zero-wait-state execution from Flash at 120 MHz, paired with a memory protection unit (MPU) and dual-bank Flash supporting seamless firmware updates. Its power architecture integrates three voltage regulators (LDO/SMPS/bypass) and five low-power modes - including Shutdown (22 nA), Standby with RTC (190 nA), and Stop 2 with RTC (2.95 µA).

Clock management includes four oscillators (4–48 MHz HSE, 32 kHz LSE, 16 MHz HSI, 32 kHz LSI), three PLLs (system/USB/audio), and clock recovery system (CRS) with ±0.25% accuracy. Peripheral interconnect uses a multi-AHB bus matrix and 14-channel DMA to sustain concurrent high-bandwidth operations across USB OTG, Octo-SPI, SAI, and SDMMC interfaces.

Key Specifications

Pinout & Package

LQFP100 (14 × 14 mm, 0.5 mm pitch) package with 100-pin footprint, 136 GPIO capability (mapped across multiple packages), and dedicated V_BAT, V_REF+, V_REF−, and LCD-TFT interface pins.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L4R5VIT6 and STM32U575ZIT6, the STM32L4Q5VGT6 uniquely balances ultra-low-power operation (190 nA Standby-with-RTC), integrated LCD-TFT graphics, and public-key acceleration - making it optimal for cost-sensitive, display-rich, battery-operated edge devices where secure firmware updates and human-readable output are both mandatory.

Availability

STM32L4Q5VGT6 is available at Aetrix Electronics and suitable for wearable health monitors, smart energy meters, industrial HMI panels, and portable diagnostic devices requiring stable component supply across multi-year production cycles.

Supply support for STM32L4Q5VGT6 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, sensors, and analog components for industrial, automotive, and consumer markets.

The STM32L4 series targets ultra-low-power embedded applications demanding extended battery life, rich peripheral integration, and functional safety - with the L4Q5 variant extending that foundation with cryptographic acceleration and full-color display support.

FAQ

What is the maximum operating temperature range for STM32L4Q5VGT6?

The STM32L4Q5VGT6 is rated for operation from –40 °C to +125 °C ambient temperature, validated per ST's production qualification standards. This extended range supports deployment in automotive cabin modules and industrial motor drives where thermal stress exceeds standard commercial limits. The device maintains full specification compliance-including Flash write endurance and RTC accuracy-across this full range.

Does STM32L4Q5VGT6 support external memory interfaces?

Yes, STM32L4Q5VGT6 integrates a Flexible Static Memory Controller (FSMC) supporting SRAM, PSRAM, NOR, NAND, and FRAM with up to 16-bit data bus and programmable timing. It also features two Octo-SPI interfaces capable of XIP execution and dual-flash configuration. These interfaces enable direct attachment of external display frame buffers, code offload storage, or high-density data logging memory without external glue logic.

How does the ART Accelerator improve real-time performance?

ART Accelerator eliminates Flash wait states at 120 MHz by caching instruction fetches and prefetching sequential code, achieving 0-wait-state execution. Benchmarks confirm 1.25 DMIPS/MHz (Dhrystone 2.1) and 3.41 CoreMark/MHz - critical for deterministic interrupt response in motor control and audio processing. Unlike generic caches, ART operates transparently with no software management overhead or cache coherency penalties.

Can STM32L4Q5VGT6 drive a 1024×768 RGB565 display directly?

Yes, the integrated LCD-TFT controller (LTDC) supports up to 1024×768@60 Hz in RGB565 format using its 16-bit parallel data bus (PD0–PD15) and dedicated control signals (HSYNC/VSYNC/DE/CLK). Pixel clock generation is fully programmable, and DMA2D handles alpha blending and color space conversion in hardware - eliminating CPU load during dynamic UI updates and enabling smooth animation at <5% CPU utilization.