STMicroelectronics STM32L4Q5RGT6P

Overview

STM32L4Q5RGT6P 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. It targets battery-powered industrial HMI, portable medical devices, and smart sensor nodes requiring high integration, real-time performance, and sub-μA standby operation.

For engineers reviewing the STM32L4Q5RGT6P datasheet, STM32L4Q5RGT6P pinout, STM32L4Q5RGT6P application, or STM32L4Q5RGT6P equivalent, key selection criteria include its 190 nA Standby-with-RTC current, dual-bank read-while-write Flash, hardware parity-checked SRAM, and support for Octo-SPI, USB OTG FS, CAN 2.0B, and Chrom-ART DMA2D graphics acceleration.

Technical Context

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

Clock management includes three PLLs (system/USB/audio), auto-trimmed multispeed oscillator (±0.25%), and dedicated LSE-driven RTC with hardware calendar and calibration. Peripheral interconnect uses a multi-AHB bus matrix and 14-channel DMA to sustain concurrent high-bandwidth operations across USB, SDMMC, Octo-SPI, and dual SAI audio interfaces.

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) package with 51 general-purpose I/Os (most 5 V-tolerant), 3x independent supply domains (VDD/VDDA/VDDIO2), and dedicated pins for SMPS control (VDDSMPS, VDDSMPS1/2), LCD-TFT (24-bit RGB + HSYNC/VSYNC/DE), and crypto peripherals (RNG, PKA).

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 STM32L4Q5RGT6P uniquely balances display integration (LCD-TFT + DMA2D), public-key acceleration (PKA), and ultra-low-power operation (190 nA Standby) in a compact LQFP64 package-making it optimal for space-constrained, battery-powered HMI and medical devices where visual feedback and secure firmware updates are mandatory.

Availability

STM32L4Q5RGT6P is available at Aetrix Electronics and suitable for industrial HMI panels, portable medical monitors, smart utility meters, and wireless sensor nodes requiring stable component supply across multi-year production cycles.

Supply support for STM32L4Q5RGT6P 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 products for industrial, automotive, and consumer markets.

The STM32L4 series targets ultra-low-power embedded applications demanding rich peripheral integration, real-time responsiveness, and extended battery life-especially in portable, wearable, and energy-harvesting systems.

FAQ

What is the maximum operating frequency and associated performance metric?

The STM32L4Q5RGT6P operates at up to 120 MHz using its Arm Cortex-M4 core with FPU. It delivers 150 DMIPS (Dhrystone 2.1) and 409.20 CoreMark® (3.41 CoreMark/MHz), validated with ART Accelerator enabled for zero-wait-state Flash execution. This performance is sustained across temperature ranges from –40 °C to +125 °C.

Does this MCU support external memory expansion, and what interfaces are available?

Yes, it supports external memory via two Octo-SPI interfaces (capable of XIP and memory-mapped mode) and a Flexible Static Memory Controller (FSMC) supporting SRAM, PSRAM, NOR, NAND, and FRAM. The Octo-SPI controllers enable high-speed daisy-chained flash expansion, while FSMC provides legacy parallel interface compatibility for existing designs.

How does the power management architecture achieve ultra-low standby current?

It achieves 190 nA Standby-with-RTC through FlexPowerControl: selective domain shutdown, optimized regulator biasing, and retention of only RTC and 32×32-bit backup registers in VBAT domain. The 22 nA Shutdown mode disables all clocks and regulators except VBAT-supplied RTC, with five dedicated wakeup pins retaining interrupt capability without leakage penalties.

Is the LQFP64 package RoHS-compliant and qualified for industrial temperature range?

Yes, the STM32L4Q5RGT6P in LQFP64 package is RoHS-compliant and qualified for industrial operation from –40 °C to +85 °C, with extended grade variants rated to +125 °C. Full qualification per AEC-Q100 is not claimed; however, ST specifies robust ESD (±4 kV HBM) and EMC performance meeting IEC 61000-4-2/4-4 standards for industrial environments.