STMicroelectronics STM32L4A6VGT6PTR

Overview

STM32L4A6VGT6PTR 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 STM32L4A6VGT6PTR datasheet, STM32L4A6VGT6PTR pinout, STM32L4A6VGT6PTR application, or STM32L4A6VGT6PTR equivalent, key selection criteria include its dual-bank flash with read-while-write capability, 24-channel capacitive touch sensing, 3× 12-bit ADCs (5 Msps), low-power timer availability in Stop mode, and UFBGA132 package compatibility with high I/O density designs.

Technical Context

This MCU integrates an Adaptive Real-Time Accelerator (ART™) enabling zero-wait-state execution from flash at 80 MHz, alongside a multi-AHB interconnect matrix that decouples CPU, DMA, and peripheral bus access to sustain deterministic real-time performance. Its FlexPowerControl architecture supports seven low-power modes-including 25 nA Shutdown and 426 nA Stop 2-with configurable voltage scaling and external SMPS interface for dynamic efficiency optimization.

The device embeds dedicated hardware accelerators including Chrom-ART (DMA2D) for GUI rendering, DFSDM digital filters for sigma-delta sensor interfacing, and dual SAI interfaces for full-duplex audio streaming. Clock management includes three PLLs (system, USB, audio), internal 48 MHz RC with clock recovery, and hardware RTC calibration-enabling precise timekeeping without external crystals in cost-sensitive applications.

Key Specifications

Pinout & Package

UFBGA132 package with 0.4 mm ball pitch, 7 mm × 7 mm body size, and 126 user I/O pins. Designed for high-density PCB layouts with thermal pad exposed on bottom side for enhanced heat dissipation in compact industrial modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L4R9VIT6, the STM32L4A6VGT6PTR trades flash capacity for superior power efficiency and SMPS integration-ideal for energy-constrained edge nodes. Against STM32L552VET6, it offers richer analog peripherals and lower active current, but lacks hardware-enforced security domains required for payment-grade applications.

Availability

STM32L4A6VGT6PTR is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical monitors, smart utility meters, and audio-enabled home controllers requiring stable component supply across multi-year production cycles.

Supply support for STM32L4A6VGT6PTR 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 sensor technologies for industrial, automotive, and consumer markets.

The STM32L4 series targets ultra-low-power embedded applications demanding high performance per microwatt, with design focus on extended battery life, robust security, and rich analog integration for sensor-centric systems.

FAQ

What is the maximum operating frequency and associated power consumption in Run mode?

The STM32L4A6VGT6PTR runs at up to 80 MHz using the ART Accelerator™. In LDO-run mode, it consumes 91 µA/MHz; with external SMPS supplying VDD12 at 1.10 V, consumption drops to 37 µA/MHz-verified per DS11584 Rev 14 Table 27. This enables sustained high-performance operation while preserving battery life in portable equipment.

Does this MCU support hardware cryptographic acceleration beyond AES and HASH?

No-this device integrates dedicated AES-128/256 and HASH-SHA256 accelerators only. It does not include TRNG-based key generation acceleration, ECC, or RSA engines. The true random number generator (RNG) provides entropy for software-based key derivation, but asymmetric crypto must be implemented in firmware using the Cortex-M4's DSP instructions.

Can the UFBGA132 package be hand-soldered or reworked using standard reflow profiles?

UFBGA132 (0.4 mm pitch, 7 × 7 mm) requires precision stencil printing and controlled reflow with peak temperature ≤260°C per JEDEC J-STD-020. Hand soldering is not recommended due to ball pitch and thermal pad underbody; use vapor-phase or nitrogen-convection reflow with profile matching ST's AN5071 guidelines to ensure void-free solder joints and reliable thermal conduction.

How many of the 136 GPIOs support independent VDDIO2 supply down to 1.08 V?

Exactly 14 GPIOs (grouped as specific pins across GPIO ports A–H) support independent VDDIO2 supply ranging from 1.08 V to 3.6 V. This allows direct interfacing with low-voltage peripherals like 1.2 V or 1.8 V sensors or FPGAs without level shifters-confirmed in Section 3.13 and Table 15 of DS11584 Rev 14.