STMicroelectronics STM32L4Q5ZGT6

Overview

STM32L4Q5ZGT6 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 metering systems requiring secure, high-resolution display and long runtime.

For engineers reviewing the STM32L4Q5ZGT6 datasheet, STM32L4Q5ZGT6 pinout, STM32L4Q5ZGT6 application, or STM32L4Q5ZGT6 equivalent, key selection factors 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 hardware-based public-key acceleration for secure firmware updates.

Technical Context

The STM32L4Q5ZGT6 implements an adaptive real-time memory accelerator (ART Accelerator) enabling zero-wait-state execution from Flash at 120 MHz, paired with a memory protection unit (MPU) for secure task isolation. Its power architecture integrates FlexPowerControl with multiple low-power modes-including 22 nA Shutdown and 2.95 μA Stop 2 with RTC-managed via dedicated voltage regulators (LDO or external SMPS).

It features a multi-AHB bus matrix supporting concurrent access to peripherals including two Octo-SPI interfaces, USB OTG 2.0 full-speed with LPM/BCD, CAN 2.0B, and a full-featured LCD-TFT controller (LTDC) with RGB interface up to 24-bit color depth. The analog subsystem includes two independent 12-bit ADCs with hardware oversampling up to 16-bit resolution and two operational amplifiers with programmable gain.

Key Specifications

Pinout & Package

STM32L4Q5ZGT6 uses the LQFP144 (20 × 20 mm) package with 144 pins, rated for industrial temperature range (–40 °C to +85 °C). Pin functions are defined per alternate function mapping (AF0–AF15) and support flexible peripheral routing across GPIO banks.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L4R5ZIT6, the STM32L4Q5ZGT6 adds LCD-TFT and PKA at the cost of Flash/SRAM capacity; versus STM32U575ZIT6, it trades TrustZone and higher SRAM for proven Octo-SPI performance and broader analog integration - making it optimal for display-rich, battery-constrained edge nodes needing public-key cryptography.

Availability

STM32L4Q5ZGT6 is available at Aetrix Electronics and suitable for industrial HMI, portable medical instrumentation, smart metering, and wireless sensor networks requiring stable component supply across extended product lifecycles.

Supply support for STM32L4Q5ZGT6 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 management ICs, sensors, and automotive chips since 1987.

The STM32L4 series targets ultra-low-power embedded applications demanding rich peripherals, robust security, and extended battery life - with the L4Q5 variant specifically optimized for display-driven, cryptographically secured edge devices.

FAQ

What is the maximum operating frequency and corresponding power efficiency of the STM32L4Q5ZGT6?

The STM32L4Q5ZGT6 operates at up to 120 MHz using its Arm Cortex-M4 core with FPU. In SMPS-supplied Run mode, it achieves 41 μA/MHz efficiency - verified in DS12902 Rev 3 Table 26 - enabling high-performance computation while maintaining sub-5 μA/MHz active power draw, critical for energy harvesting and coin-cell applications.

Does the STM32L4Q5ZGT6 support external memory interfaces beyond Octo-SPI?

Yes. In addition to two Octo-SPI interfaces, the STM32L4Q5ZGT6 integrates a Flexible Static Memory Controller (FSMC) supporting SRAM, PSRAM, NOR, NAND, and FRAM devices. This dual-memory architecture allows simultaneous use of high-speed Octo-SPI flash for code and parallel FSMC RAM for real-time data buffers - confirmed in Section 3.18 and Table 2 of DS12902 Rev 3.

How does the LCD-TFT controller (LTDC) interface with display panels?

The LTDC provides a full 24-bit RGB interface (D0–D23, HSYNC, VSYNC, DE, CLK) with programmable timing and layer blending. It directly drives TFT panels up to WXGA resolution without external video memory, leveraging the Chrom-ART Accelerator for overlay composition. Pin assignments for RGB signals are fixed per LQFP144 package layout - detailed in Section 4 (Pinouts) and Table 15 of DS12902 Rev 3.

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

The STM32L4Q5ZGT6 includes dedicated hardware blocks for AES-128/256 encryption/decryption, SHA-256 hashing, RSA/ECC public-key operations via PKA, and true random number generation. All are silicon-verified per ST's AN5114 and DS12902 Rev 3 Sections 3.32–3.34; PKA performance metrics (e.g., 35 ms for ECC-256 key agreement) are measured and published in Application Note AN5278.