STMicroelectronics STM32L4Q5CGT6

Overview

STM32L4Q5CGT6 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 and sub-μA standby operation.

For engineers reviewing the STM32L4Q5CGT6 datasheet, STM32L4Q5CGT6 pinout, STM32L4Q5CGT6 application, or STM32L4Q5CGT6 equivalent, key selection criteria include its 190 nA Standby-with-RTC current, dual-bank read-while-write Flash, 2x 12-bit ADCs (5 Msps), Chrom-ART Accelerator for GUI rendering, and CAN 2.0B interface for industrial connectivity.

Technical Context

The STM32L4Q5CGT6 implements FlexPowerControl architecture with five low-power modes: Shutdown (22 nA), Standby (42 nA), Standby with RTC (190 nA), Stop 2 with 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.

It integrates dual Octo-SPI interfaces for high-speed external memory, a full-featured LCD-TFT controller (LTDC) supporting RGB888 and up to 1024×768, and hardware cryptographic blocks including AES-128/256, SHA-256, PKA, and TRNG - all operating in low-power states without CPU intervention.

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), and dedicated power/ground pins for analog/digital separation and low-noise operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L4R5ZIT6, the STM32L4Q5CGT6 offers integrated LCD-TFT and PKA at lower cost and smaller footprint; versus STM32U575ZIT6, it provides simpler display integration and proven low-power stability, though with less advanced security and slightly higher active current.

Availability

STM32L4Q5CGT6 is available at Aetrix Electronics and suitable for industrial HMI, portable medical devices, smart utility meters, and wireless sensor nodes requiring stable component supply across multi-year production cycles.

Supply support for STM32L4Q5CGT6 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 peripherals, robust security, and long battery life - optimized for intelligent edge devices where energy efficiency and integration are critical.

FAQ

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

The STM32L4Q5CGT6 achieves 120 MHz maximum CPU frequency using its Adaptive Real-Time Accelerator (ART), which caches Flash accesses to eliminate wait states. This requires enabling ART in firmware and configuring Flash latency to 5WS at 120 MHz. The internal 16 MHz RC oscillator is factory-trimmed to ±1%, and PLL multiplication supports precise clock generation.

Does STM32L4Q5CGT6 support external memory expansion?

Yes - it features a Flexible Static Memory Controller (FSMC) supporting SRAM, PSRAM, NOR, NAND, and FRAM, plus two independent Octo-SPI interfaces capable of x4 or x8 data widths. These enable direct connection to high-density serial flash or PSRAM for extended code/data space, with hardware timing control and DMA support for zero-CPU overhead transfers.

How does the LCD-TFT controller interface with displays?

The integrated LTDC supports RGB parallel interfaces up to 24-bit (RGB888) at resolutions up to 1024×768, with programmable pixel clock, HSYNC/VSYNC polarity, and data enable timing. It drives displays directly without external logic, and pairs with Chrom-ART Accelerator for layer composition, alpha blending, and image rotation - all handled in hardware without CPU involvement.

What cryptographic functions are hardware-accelerated?

Hardware accelerators include AES-128/256 (ECB/CBC/CTR/GCM), SHA-256 (HASH unit), Public Key Accelerator (PKA) for RSA-2048/4096 and ECC (NIST P-256/P-384), True Random Number Generator (TRNG), and CRC-32. All operate independently of the CPU and retain functionality in Stop and Standby modes when clocks are gated appropriately.