STMicroelectronics STM32L4Q5RGT6

Overview

STM32L4Q5RGT6 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 STM32L4Q5RGT6 datasheet, STM32L4Q5RGT6 pinout, STM32L4Q5RGT6 application, or STM32L4Q5RGT6 equivalent, key selection criteria include ultra-low-power run/stop modes (41 µA/MHz @ SMPS), dual-bank read-while-write Flash, hardware parity-checked SRAM, and 136 GPIOs with 5 V tolerance and independent supply options down to 1.08 V.

Technical Context

This MCU 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 FlexPowerControl architecture supporting seven low-power modes - including 22 nA Shutdown and 190 nA Standby with RTC. The core integrates dual PLLs for system/USB/audio clocks and supports dynamic voltage scaling across three power ranges.

Peripherals are routed via a multi-AHB bus matrix and 14-channel DMA controller; analog subsystem includes two 12-bit ADCs (5 Msps), two DACs, two op-amps with PGA, and two ultra-low-power comparators - all with independent supply domains for mixed-signal isolation and precision.

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) package with 64 pins, 51 general-purpose I/Os (most 5 V-tolerant), dedicated V_DDA/V_SSA analog supplies, separate V_REF+/V_REF-, and dedicated LCD-TFT segment/common driver pins.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L4R5ZIT6 and STM32U575ZIT6, the STM32L4Q5RGT6 uniquely balances ultra-low-power operation, integrated LCD-TFT driving capability, and cryptographic acceleration - making it optimal for cost-sensitive, display-integrated portable devices requiring long battery life and secure firmware updates.

Availability

STM32L4Q5RGT6 is available at Aetrix Electronics and suitable for wearable health monitors, industrial HMI panels, smart energy meters, and portable diagnostic devices requiring stable component supply across multi-year production cycles.

Supply support for STM32L4Q5RGT6 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 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 robust security - optimized for portable medical, metering, and human-machine interface systems.

FAQ

What is the maximum operating frequency and associated power consumption in Run mode?

The STM32L4Q5RGT6 achieves 120 MHz using its Arm Cortex-M4 core with ART Accelerator. In Run mode with LDO regulation, it consumes 110 µA/MHz; with external SMPS, consumption drops to 41 µA/MHz at 3.3 V - verified per DS12902 Rev 3 Table 26. This enables high-performance signal processing while maintaining ultra-low active power.

Does STM32L4Q5RGT6 support hardware-based secure boot and firmware authentication?

Yes. It integrates AES-128/256, Public Key Accelerator (PKA) for RSA/ECC operations, HASH (SHA-256), and TRNG - enabling hardware-accelerated secure boot, signed firmware validation, and encrypted OTA updates without CPU overhead. These blocks are accessible via STM32CubeProgrammer and supported in STM32CubeMX middleware.

Can the LCD-TFT controller drive RGB888 panels without external memory?

Yes. The LTDC controller supports up to 1024×768@60 Hz with RGB888 output and uses internal Chrom-ART Accelerator (DMA2D) for layer composition. Framebuffer storage resides in the 320-KB SRAM - sufficient for 480×272@16bpp (256 KB) or smaller resolutions at higher color depth, eliminating need for external SDRAM in many HMI designs.

How many GPIOs support independent I/O supply and what is the minimum voltage?

Up to 14 GPIOs (grouped as V_DDIO2) support independent supply down to 1.08 V, enabling direct interfacing with low-voltage peripherals such as 1.2-V logic, LPDDR I/O, or segmented LCD drivers. This is implemented via dedicated V_DDIO2/V_SSIO2 pins and configured through SYSCFG registers - detailed in Section 3.11 of DS12902 Rev 3.