STMicroelectronics STM32L4A6VGT6P

Overview

STM32L4A6VGT6P 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, achieves 100 DMIPS at 80 MHz, and delivers 37 µA/MHz in SMPS-run mode-targeted for battery-powered industrial sensors and portable medical devices requiring secure, real-time processing.

For engineers reviewing the STM32L4A6VGT6P datasheet, STM32L4A6VGT6P pinout, STM32L4A6VGT6P application, or STM32L4A6VGT6P equivalent, key selection criteria include its dual-bank flash with read-while-write, 2.57 µA Stop 2 mode, Chrom-ART Accelerator™ for GUI offload, 3× 12-bit ADCs (5 Msps), and dual CAN 2.0B interfaces for robust fieldbus integration.

Technical Context

The device integrates an Adaptive Real-time Accelerator (ART Accelerator™) enabling zero-wait-state execution from flash at 80 MHz, coupled 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.

Core peripherals include two SAIs for full-duplex audio streaming, four I²C FM+ interfaces (1 Mbit/s), five UARTs with ISO 7816/LIN/IrDA support, and a flexible static memory controller (FSMC) for NOR/PSRAM/NAND expansion. Clocking relies on three PLLs (system, USB, audio) and internal oscillators auto-trimmed to ±0.25% accuracy using the 32 kHz LSE.

Key Specifications

Pinout & Package

LQFP100 package with 0.5 mm pitch, exposed thermal pad, and standard JEDEC-compliant footprint for automated assembly and thermal management in space-constrained designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L4R5ZIT6 and STM32L552RET6, the STM32L4A6VGT6P uniquely balances sub-µA standby, SMPS-driven efficiency, and rich analog/audio peripherals-making it optimal for cost-sensitive, battery-operated edge nodes where power budget and mixed-signal integration are primary constraints.

Availability

STM32L4A6VGT6P is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical monitors, smart utility meters, and audio-enabled IoT gateways requiring stable component supply across multi-year production cycles.

Supply support for STM32L4A6VGT6P 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 ICs, sensors, and automotive chips since 1987.

The STM32L4 series targets ultra-low-power embedded applications demanding high performance-per-milliwatt, featuring advanced power gating, multiple low-power modes, and integrated analog/mixed-signal peripherals for sensor fusion and edge intelligence.

FAQ

What is the maximum operating frequency and associated performance metric?

The STM32L4A6VGT6P runs at up to 80 MHz with its Arm Cortex-M4 core, delivering 100 DMIPS and 273.55 CoreMark® (3.42 CoreMark/MHz). This performance is sustained with zero wait states via the ART Accelerator™, enabling deterministic real-time response in motor control and sensor fusion tasks without flash access penalties.

Does this MCU support external memory expansion, and what interfaces are available?

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 serial flash. These allow direct attachment of external display buffers, firmware storage, or data log memory without external glue logic, simplifying BOM and PCB layout for HMI and data-logging applications.

How does the SMPS interface improve power efficiency compared to LDO-only operation?

The dedicated SMPS control signals (SMPS_EN, SMPS_VOUT, SMPS_FB) enable direct regulation of the VDD12 supply rail, reducing run-mode current to 37 µA/MHz-versus 91 µA/MHz in LDO mode. This 60% reduction extends battery life significantly in always-on or frequently awakened edge devices, validated across temperature and voltage ranges per DS11584 Rev 14 Section 6.3.5.

What hardware security features are integrated beyond AES and HASH accelerators?

In addition to AES-128/256 and SHA-256 engines, the device includes a true random number generator (RNG), 96-bit unique ID, proprietary code readout protection (RDP), firewall for peripheral access control, and memory protection unit (MPU). These collectively support secure boot, firmware authentication, and runtime isolation-meeting requirements for IEC 62443 and UL 60730 compliance in industrial endpoints.