STMicroelectronics STM32L4Q5QGI6P

Overview

STM32L4Q5QGI6P 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 industrial HMI, portable medical monitors, and smart metering gateways requiring long runtime and secure display control.

For engineers reviewing the STM32L4Q5QGI6P datasheet, STM32L4Q5QGI6P pinout, STM32L4Q5QGI6P application, or STM32L4Q5QGI6P equivalent, key selection criteria include verified 22 nA shutdown current, dual-bank read-while-write Flash, hardware parity-checked SRAM, and LQFP100 package compatibility with TFT interface routing and low-power analog peripheral integration.

Technical Context

The STM32L4Q5QGI6P implements FlexPowerControl architecture with five distinct low-power modes: Shutdown (22 nA), Standby (42 nA), Standby+RTC (190 nA), Stop 2+RTC (2.95 µA), and Run mode at 110 µA/MHz (LDO) or 41 µA/MHz (SMPS). Its ART Accelerator enables zero-wait-state execution from Flash at 120 MHz, while the interconnect matrix routes 23 communication peripherals-including USB OTG FS, dual Octo-SPI, CAN 2.0B, and 6x USARTs-across dual AHB buses.

Analog subsystem integration includes two 12-bit ADCs (5 Msps, hardware oversampling up to 16-bit), two 12-bit DACs, two op-amps with PGA, two ultra-low-power comparators, and DFSDM filters. The LTDC controller supports RGB888/TFT panels up to 1024×768, and the Chrom-ART Accelerator (DMA2D) offloads 2D graphics composition from the CPU.

Key Specifications

Pinout & Package

LQFP100 package: 100-pin quad flat pack with exposed thermal pad, 0.5 mm pitch, 14 × 14 mm body, suitable for high-density PCB layouts with TFT signal integrity and thermal management in extended-temperature applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L4R5ZIT6, the STM32L4Q5QGI6P offers PKA for efficient ECC key generation and smaller LQFP100 footprint; versus STM32L552RET6, it delivers superior display throughput and analog integration but lacks TrustZone-enforced memory isolation.

Availability

STM32L4Q5QGI6P is available at Aetrix Electronics and suitable for industrial HMI, portable medical devices, smart metering gateways, and wireless sensor hubs requiring stable component supply across multi-year production cycles.

Supply support for STM32L4Q5QGI6P 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 ICs, sensors, and automotive semiconductors since 1987.

The STM32L4 series targets ultra-low-power embedded applications demanding rich peripheral integration, cryptographic security, and extended battery life - optimized for industrial, healthcare, and smart infrastructure endpoints.

FAQ

What is the maximum operating frequency and how is it achieved?

The STM32L4Q5QGI6P achieves 120 MHz maximum CPU frequency using its adaptive real-time accelerator (ART Accelerator), which enables zero-wait-state execution from Flash memory. This is validated under conditions of 3.3 V supply, 25 °C ambient, and enabled prefetch buffer and instruction cache - delivering consistent 150 DMIPS performance without external RAM dependency.

Does this MCU support external SDRAM or PSRAM, and which interface is used?

Yes, the STM32L4Q5QGI6P supports external PSRAM and SDRAM via its Flexible Static Memory Controller (FSMC), which provides dedicated address/data bus timing control for asynchronous/synchronous memories. It also supports Octo-SPI interfaces for high-speed serial PSRAM and NOR flash, enabling bandwidth up to 133 MB/s in octal mode.

How does the LCD-TFT controller interface with external displays?

The LTDC controller supports parallel RGB888, RGB666, and YUV formats with programmable pixel clock, HSYNC/VSYNC polarity, and data enable timing. It drives up to 1024×768 resolution at 60 Hz using dedicated D0–D23 pins, and integrates with DMA2D for hardware-accelerated layer blending, alpha blending, and image format conversion without CPU intervention.

What cryptographic functions are hardware-accelerated and how are they accessed?

The STM32L4Q5QGI6P includes dedicated hardware blocks for AES-128/256 encryption/decryption, SHA-256 hashing (HASH), and public-key operations (PKA) including ECC point multiplication and RSA modular exponentiation. These are accessed via memory-mapped registers and supported by STM32CubeL4 HAL drivers, enabling sub-millisecond ECDSA signing and TLS handshake acceleration.