STMicroelectronics STM32L4Q5CGT6P

Overview

STM32L4Q5CGT6P 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, LCD-TFT controller, AES+PKA cryptographic accelerators, and integrated external SMPS support. It operates from 1.71 V to 3.6 V across –40 °C to 125 °C and delivers 150 DMIPS (1.25 DMIPS/MHz), targeting battery-powered industrial sensors and portable medical devices requiring secure, high-resolution display and long runtime.

For engineers reviewing the STM32L4Q5CGT6P datasheet, STM32L4Q5CGT6P pinout, STM32L4Q5CGT6P application, or STM32L4Q5CGT6P equivalent, key selection criteria include its dual-bank read-while-write Flash, 2.95 µA Stop 2 mode with RTC, 41 µA/MHz SMPS-run efficiency, and hardware-accelerated public-key cryptography for firmware signing and secure boot.

Technical Context

The device integrates an adaptive real-time accelerator (ART) enabling zero-wait-state execution from Flash at 120 MHz, a multi-AHB bus matrix supporting concurrent peripheral access, and a dedicated interconnect for cryptographic blocks (AES, PKA, HASH, RNG). Its power architecture includes three independent voltage regulators (LDO/SMPS/VREFBUF) and five low-power modes with sub-µA retention states.

Peripherals are routed via a configurable DMA controller with 14 channels and DMAMux, while clocking uses three PLLs (system/USB/audio), auto-trimmed internal oscillators (±0.25%), and dual Octo-SPI interfaces supporting XIP and memory-mapped execution. The analog subsystem features two 12-bit ADCs (5 Msps, hardware oversampling up to 16-bit), two DACs, two op-amps with PGA, and two ultra-low-power comparators-all with independent supply domains.

Key Specifications

Pinout & Package

LQFP48 (7 × 7 mm, 0.5 mm pitch) package with 42 general-purpose I/Os, 5 V-tolerant on most pins, and independent supply capability for 14 I/Os down to 1.08 V.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L4R5ZIT6, STM32L4Q5CGT6P offers PKA for efficient asymmetric crypto but less Flash; versus STM32U575ZIT6, it retains integrated LCD-TFT at higher active current, making it optimal for cost-sensitive, display-centric legacy-upgrade designs.

Availability

STM32L4Q5CGT6P is available at Aetrix Electronics and suitable for smart utility meters, portable medical monitors, industrial HMIs, and secure IoT gateways requiring stable component supply, long-term lifecycle assurance, and qualified automotive-grade temperature operation (–40 °C to 125 °C).

Supply support for STM32L4Q5CGT6P 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, specializing in microcontrollers, power management, sensors, and automotive ICs with strong focus on energy efficiency and embedded security.

The STM32L4 series targets ultra-low-power applications demanding rich peripherals, cryptographic acceleration, and extended battery life-designed specifically for intelligent edge nodes where runtime, security, and display integration are co-critical.

FAQ

What is the maximum operating frequency and associated performance metric?

The STM32L4Q5CGT6P achieves a maximum CPU frequency of 120 MHz, delivering 150 DMIPS (Dhrystone 2.1) at 1.25 DMIPS/MHz. This performance is sustained with zero-wait-state execution from Flash memory thanks to the ART Accelerator, and verified under full-speed operation with all peripherals enabled and voltage scaling set to Range 1 (1.2 V core).

Does this MCU support external SMPS, and how does it impact power consumption?

Yes, the STM32L4Q5CGT6P includes dedicated VDD_SMPS and VDDA_SMPS pins to interface with an external switched-mode power supply. In SMPS mode, active current drops to 41 µA/MHz at 3.3 V-37% lower than LDO mode (110 µA/MHz)-enabling longer battery life in continuous operation scenarios such as always-on sensor hubs or display controllers.

How many I/O pins support independent voltage supply, and why is this important?

Up to 14 GPIOs support independent supply down to 1.08 V, allowing direct interfacing with low-voltage peripherals (e.g., 1.2 V logic sensors or memory) without level shifters. This feature simplifies board design, reduces BOM count, and avoids signal integrity issues in mixed-voltage systems-critical for compact, multi-rail industrial and medical devices.

What display interfaces does the STM32L4Q5CGT6P natively support?

The MCU integrates a full-featured LCD-TFT controller (LTDC) supporting up to 24-bit RGB parallel interface (XGA resolution), plus Chrom-ART Accelerator (DMA2D) for hardware-accelerated 2D graphics composition. It does not support MIPI DSI or LVDS; external bridge ICs are required for those standards. The LTDC is fully functional in LQFP48 package using PF/PD/G pins mapped per datasheet Table 15.