STMicroelectronics STM32L4Q5QGI6

Overview

STM32L4Q5QGI6 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 STM32L4Q5QGI6 datasheet, STM32L4Q5QGI6 pinout, STM32L4Q5QGI6 application, or STM32L4Q5QGI6 equivalent, key selection criteria include its 190 nA Standby-with-RTC current, dual-bank read-while-write Flash, 2×12-bit ADCs (5 Msps), Chrom-ART Accelerator for GUI rendering, and CAN 2.0B interface - all in a compact UFBGA132 (7 × 7 mm) package.

Technical Context

The STM32L4Q5QGI6 integrates an adaptive real-time accelerator (ART) enabling zero-wait-state execution from Flash at 120 MHz, and a multi-layer AHB bus matrix supporting concurrent access to peripherals and memory. Its FlexPowerControl architecture delivers granular low-power mode control, including Shutdown (22 nA), Standby with RTC (190 nA), and Stop 2 with RTC (2.95 µA).

It features three independent PLLs (system, USB/audio, ADC), dual Octo-SPI interfaces for high-speed external memory expansion, and hardware-based cryptographic acceleration including AES-128/256, SHA-256, PKA for ECC/RSA, and true random number generation - all operating under full voltage scaling control (VOS0–VOS3).

Key Specifications

Pinout & Package

STM32L4Q5QGI6 is housed in a 132-ball UFBGA package (7 × 7 mm, 0.5 mm pitch), optimized for space-constrained portable designs. The ball map supports full peripheral routing including LCD-TFT interface (24-bit RGB + sync), dual Octo-SPI, and dedicated V_BAT/RTC power domain.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L4R5ZIT6, the STM32L4Q5QGI6 offers PKA and dual Octo-SPI at lower pin count and power - ideal for secure, display-rich edge nodes. Versus STM32U575ZIT6, it trades TrustZone for integrated LCD-TFT and proven low-power analog - better suited for cost-sensitive, display-integrated designs.

Availability

STM32L4Q5QGI6 is available at Aetrix Electronics and suitable for industrial HMI, portable medical devices, smart metering, and wireless sensor gateways requiring stable component supply across multi-year production cycles.

Supply support for STM32L4Q5QGI6 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.

The STM32L4 series targets ultra-low-power embedded applications demanding rich peripherals, cryptographic security, and extended battery life - with the L4Q5 variant adding LCD-TFT and PKA for secure, display-enabled edge intelligence.

FAQ

What is the maximum operating temperature for STM32L4Q5QGI6?

The STM32L4Q5QGI6 is rated for operation from –40 °C to +125 °C ambient temperature, validated per ST's production data (DS12902 Rev 3). This extended range supports deployment in harsh industrial environments such as motor drives and outdoor smart meters, where junction temperature must remain within safe limits under full peripheral load and SMPS operation.

Does STM32L4Q5QGI6 support external memory interfaces beyond Octo-SPI?

Yes - it integrates a Flexible Static Memory Controller (FSMC) supporting SRAM, PSRAM, NOR, NAND, and FRAM with address/data multiplexing. Unlike Octo-SPI (optimized for serial flash/XIP), FSMC provides parallel 8-/16-bit bus timing for legacy memory types, enabling compatibility with existing display controllers or legacy data buffers without FPGA glue logic.

How does the PKA block accelerate cryptographic operations?

The Public Key Accelerator (PKA) implements dedicated hardware for ECC scalar multiplication (NIST P-256/P-384), RSA modular exponentiation, and key pair generation - reducing ECC-256 signature time from ~120 ms (software) to <12 ms. It operates independently of the CPU, freeing the Cortex-M4 for real-time tasks while maintaining side-channel resistance per ST's AN5182 implementation guide.

Can the LCD-TFT controller drive displays without external gamma correction?

Yes - the LTDC includes programmable gamma correction tables (256 entries × 3 channels) and supports dithering, color lookup (CLUT), and alpha blending in hardware. It directly outputs RGB888/RGB565 signals with configurable polarity and timing, eliminating need for external TCON chips in mid-resolution (≤800×480) TFT panels used in medical handhelds and industrial panels.