STMicroelectronics STM32L4A6AGI6

Overview

STM32L4A6AGI6 from STMicroelectronics is an ultra-low-power Arm® Cortex®-M4 32-bit MCU with FPU, 1 MB flash, 320 KB SRAM, USB OTG FS, hardware AES+HASH encryption, and integrated SMPS support. It operates from 1.71–3.6 V across –40 °C to 125 °C, delivers 100 DMIPS at 80 MHz, and targets battery-powered industrial sensors and portable medical devices requiring secure, real-time processing with extended runtime.

For engineers reviewing the STM32L4A6AGI6 datasheet, STM32L4A6AGI6 pinout, STM32L4A6AGI6 application, or STM32L4A6AGI6 equivalent, key selection criteria include its 37 µA/MHz SMPS-enabled run mode, dual-bank read-while-write flash, 24-channel capacitive touch sensing, and dual CAN 2.0B interfaces for robust fieldbus integration in constrained environments.

Technical Context

The device integrates an Adaptive Real-time Accelerator (ART Accelerator™) enabling zero-wait-state execution from flash at 80 MHz, paired with a memory protection unit (MPU) and interconnect matrix for deterministic peripheral arbitration. Its FlexPowerControl architecture supports seven low-power modes-including 25 nA shutdown and 426 nA standby with RTC-managed via dedicated power control logic and brown-out reset across all active states.

Hardware acceleration includes AES-128/256 and SHA-256 engines for secure firmware updates and data-at-rest protection, while the Chrom-ART Accelerator (DMA2D) offloads 2D graphics rendering. The analog subsystem features three 12-bit ADCs (5 Msps), two 12-bit DACs, two op-amps with PGA, and two ultra-low-power comparators-all with independent supply domains for noise isolation.

Key Specifications

Pinout & Package

STM32L4A6AGI6 is packaged in UFBGA169 (7 × 7 mm, 0.5 mm pitch), a fine-pitch ball grid array optimized for high I/O density and thermal performance in space-constrained designs. Pin assignments are validated per STMicroelectronics DS11584 Rev 14 Section 4 ("Pinouts and pin description") and Table 15 ("STM32L4A6xG pin definitions").

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L4A6AGI6, the L4R9 offers greater memory for complex GUIs but sacrifices SMPS-driven efficiency, while the L562 adds TrustZone security at the cost of 47% less flash and higher active current-making the L4A6 optimal for balanced ultra-low-power + crypto + connectivity.

Availability

STM32L4A6AGI6 is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical monitors, smart building HVAC controllers, and automotive body control modules requiring stable component supply across long product lifecycles.

Supply support for STM32L4A6AGI6 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, and MEMS technologies for industrial, automotive, and consumer markets.

The STM32L4 series is designed for ultra-low-power embedded applications demanding high performance-per-milliwatt, integrated security, and rich analog/mixed-signal capability-targeting battery-operated and energy-harvesting systems.

FAQ

What is the maximum operating temperature range for STM32L4A6AGI6?

The STM32L4A6AGI6 is rated for operation from –40 °C to +125 °C ambient temperature, validated per DS11584 Rev 14 Section 6.3.1. This extended range supports deployment in under-hood automotive modules, industrial drives, and outdoor environmental sensors without derating.

Does STM32L4A6AGI6 support external memory expansion?

Yes-it integrates a Flexible Static Memory Controller (FSMC) supporting SRAM, PSRAM, NOR, and NAND memories, plus a Dual-flash Quad SPI interface for high-speed external code/data storage. Both interfaces are accessible via dedicated address/data buses and configurable timing registers.

How many independent power domains does the analog subsystem use?

The analog peripherals-including ADCs, DACs, OPAMPs, comparators, and TSC-operate from separate VDDA/VSSA rails, electrically isolated from the digital core. This design prevents digital switching noise from degrading analog measurement accuracy, especially critical for medical-grade signal chains.

Is the USB OTG FS interface compatible with USB Battery Charging (BC) 1.2?

Yes-the USB OTG FS peripheral implements Battery Charging Detection (BCD) per USB BC 1.2 specification, enabling automatic identification of SDP, CDP, and DCP port types. This allows the MCU to negotiate appropriate charging current without external ICs in portable devices.