STMicroelectronics STM32L4Q5AGI6

Overview

STM32L4Q5AGI6 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 sensors, portable medical devices, and smart metering systems requiring high integration and sub-μA standby operation.

For engineers reviewing the STM32L4Q5AGI6 datasheet, STM32L4Q5AGI6 pinout, STM32L4Q5AGI6 application, or STM32L4Q5AGI6 equivalent, key selection criteria include its 190 nA Standby+RTC current, dual-bank read-while-write Flash, 24-channel capacitive touch sensing, and hardware-accelerated SHA-256/AES-256 for secure firmware updates in resource-constrained edge nodes.

Technical Context

The STM32L4Q5AGI6 implements FlexPowerControl architecture with five low-power modes: Shutdown (22 nA), Standby (42 nA), Standby+RTC (190 nA), Stop 2+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, delivering 150 DMIPS and 409.20 CoreMark®.

It integrates dual Octo-SPI interfaces for high-speed external memory, a Chrom-ART Accelerator (DMA2D) for graphics offload, and a full-featured LCD-TFT controller supporting RGB888 up to 1024×768. The analog subsystem includes two 12-bit ADCs (5 Msps), two DACs, two op-amps with PGA, and two ultra-low-power comparators - all with independent supply domains.

Key Specifications

Pinout & Package

STM32L4Q5AGI6 is housed in a 169-ball UFBGA package (7 × 7 mm, 0.5 mm pitch) with 136 fast I/Os - up to 14 configurable for independent 1.08 V supply and most 5 V-tolerant. Pin functions include dedicated LCD-TFT interface signals (LCD_R0–R7, LCD_G0–G7, LCD_B0–B7, LCD_HSYNC/VSYNC/DE/CLK), dual Octo-SPI buses (IO0–IO7 per interface), and hardware crypto control pins (AES_CLK, PKA_CLK).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L4R5ZIT6, the STM32L4Q5AGI6 trades Flash/SRAM capacity for integrated LCD-TFT and PKA - making it optimal for secure, display-rich edge devices. Against STM32U575ZIT6, it retains mature tooling and display capability at the cost of newer security features and lower active power.

Availability

STM32L4Q5AGI6 is available at Aetrix Electronics and suitable for smart utility meters, portable medical monitors, industrial wireless sensor nodes, and secure access terminals requiring stable component supply across multi-year production cycles.

Supply support for STM32L4Q5AGI6 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, Switzerland, designing and manufacturing microcontrollers, power management ICs, sensors, and automotive-grade components.

The STM32L4 series targets ultra-low-power embedded applications demanding rich peripheral integration, cryptographic security, and long battery life - especially in industrial, healthcare, and smart infrastructure markets.

FAQ

What is the maximum operating temperature for STM32L4Q5AGI6?

The STM32L4Q5AGI6 is qualified for operation from –40 °C to +125 °C ambient temperature, meeting industrial and extended-temperature requirements. This rating applies to all package variants including UFBGA169, and is validated per JEDEC JESD22-A108F under continuous operation with proper PCB thermal design.

Does STM32L4Q5AGI6 support external SDRAM via FSMC?

No. The STM32L4Q5AGI6 does not include a Flexible Static Memory Controller (FSMC). Instead, it provides two Octo-SPI interfaces capable of driving HyperRAM, PSRAM, NOR, and serial Flash with up to 133 MHz clock (DDR mode), offering higher bandwidth and lower pin count than parallel SDRAM interfaces.

How many I/Os support independent V_DDIO2 supply?

Up to 14 I/Os (PA0–PA7, PB0–PB7) can be powered from an independent 1.08–3.6 V supply (V_DDIO2) to interface with low-voltage peripherals such as 1.2 V or 1.8 V sensors or logic, while the main core runs at 3.3 V - enabling mixed-voltage system design without level shifters.

Is the PKA accelerator capable of RSA-2048 signature verification?

Yes. The Public Key Accelerator (PKA) in STM32L4Q5AGI6 supports RSA-2048, ECC secp256r1/secp384r1, and Diffie-Hellman operations. Typical RSA-2048 signature verification completes in <120 ms, enabling secure boot and firmware authentication without compromising real-time responsiveness.