STMicroelectronics STM32L4Q5ZGT6P

Overview

STM32L4Q5ZGT6P 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) for battery-powered industrial HMI and portable medical devices.

For engineers reviewing the STM32L4Q5ZGT6P datasheet, STM32L4Q5ZGT6P pinout, STM32L4Q5ZGT6P application, or STM32L4Q5ZGT6P equivalent, key selection criteria include its 190 nA standby-with-RTC current, dual-bank read-while-write Flash, hardware parity-checked SRAM, Octo-SPI interfaces, and 136 GPIOs with 5 V tolerance - critical for robust, low-power embedded control with display and secure connectivity.

Technical Context

The STM32L4Q5ZGT6P integrates an adaptive real-time accelerator (ART) enabling zero-wait-state execution from Flash at 120 MHz, a memory protection unit (MPU), and a multi-AHB bus matrix supporting concurrent access to peripherals and memories. Its power architecture includes FlexPowerControl with Shutdown (22 nA), Standby (42 nA), and Stop 2 (2.95 µA) modes - all featuring 5 wakeup pins and brownout reset (BOR) in every active mode except Shutdown.

It features three PLLs (system, USB, audio/ADC), four clock sources including auto-trimmed multispeed 100 kHz–48 MHz RC (±0.25%), and dual Octo-SPI interfaces supporting XIP and memory-mapped execution. The analog subsystem includes 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

LQFP144 (20 × 20 mm, 0.5 mm pitch) package with 136 fast I/Os - most 5 V-tolerant, up to 14 I/Os configurable with independent supply down to 1.08 V. Includes dedicated VBAT, VREF+, VREF–, VDDA, VSSA, and multiple VDD/VSS pairs for noise isolation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L4R5ZIT6, the STM32L4Q5ZGT6P trades Flash capacity for PKA and SMPS control - essential for secure, battery-optimized display systems. Against STM32U575ZIT6, it retains mature TFT and Octo-SPI support at lower security certification overhead, making it optimal for cost-sensitive, display-rich edge devices.

Availability

STM32L4Q5ZGT6P is available at Aetrix Electronics and suitable for industrial HMI panels, portable medical monitors, smart utility meters, and low-power IoT gateways requiring stable component supply across extended temperature and lifecycle requirements.

Supply support for STM32L4Q5ZGT6P 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 vertical manufacturing and broad IP portfolio.

The STM32L4 series targets ultra-low-power embedded applications demanding rich peripherals, cryptographic acceleration, and extended battery life - designed specifically for intelligent edge devices where energy efficiency and security coexist.

FAQ

What is the maximum operating temperature for STM32L4Q5ZGT6P?

The STM32L4Q5ZGT6P is qualified for operation from –40 °C to +125 °C ambient temperature, validated per JEDEC JESD47 and ST's internal stress testing. This extended range supports deployment in industrial enclosures, automotive under-hood environments, and outdoor metering applications without derating.

Does STM32L4Q5ZGT6P support external memory interfaces beyond Octo-SPI?

Yes - it integrates a Flexible Static Memory Controller (FSMC) supporting SRAM, PSRAM, NOR, NAND, and FRAM with 8-/16-bit data bus and asynchronous/synchronous timing. This complements the two Octo-SPI ports, enabling hybrid memory architectures (e.g., Octo-SPI for code XIP, FSMC for large buffer RAM).

How does the external SMPS control work on STM32L4Q5ZGT6P?

PD0 (SMPS_EN) and PD1 (SMPS_VSEL) directly drive an external buck converter: PD0 enables/disables the SMPS, while PD1 selects output voltage (1.2 V, 1.5 V, 1.8 V, or 2.5 V) via resistor ladder or DAC. This reduces system-wide active current by ~60% compared to internal LDO operation.

Is the LCD-TFT controller capable of driving RGB888 panels?

Yes - the LTDC supports 24-bit RGB (RGB888) interface with programmable pixel clock, HSYNC/VSYNC/DE timing, and up to XGA (1024×768) resolution. It includes layer blending, alpha blending, and CLUT support, and operates independently of CPU load via dedicated AHB bus matrix access.