STMicroelectronics STM32L4S7VIT6

Overview

STM32L4S7VIT6 from STMicroelectronics is an ultra-low-power Arm® Cortex®-M4 32-bit MCU with FPU, 120 MHz max frequency, 2 MB Flash, 640 KB SRAM, and integrated MIPI DSI host controller + LCD-TFT controller. It delivers 150 DMIPS and supports capacitive touch sensing (24 channels), hardware AES-256/SHA-256 encryption, and dual Octo-SPI interfaces - deployed in portable medical monitors requiring high-resolution color display, secure data logging, and battery life exceeding 7 days on a single charge.

For engineers reviewing the STM32L4S7VIT6 datasheet, STM32L4S7VIT6 pinout, STM32L4S7VIT6 application, or STM32L4S7VIT6 equivalent, key selection criteria include its 120 MHz real-time performance with ART Accelerator, sub-μA low-power modes (e.g., 420 nA Stop 2 with RTC), 5 V-tolerant I/Os (up to 136 pins), and dual-bank Flash for robust firmware updates in field-deployed IoT edge nodes.

Technical Context

The device integrates an adaptive real-time memory accelerator (ART) enabling zero-wait-state execution from Flash at 120 MHz, alongside a multi-AHB interconnect matrix that decouples CPU, DMA, and peripheral bus traffic to sustain concurrent high-bandwidth operations - such as simultaneous MIPI DSI video streaming, AES-encrypted sensor data processing, and SDMMC-based logging.

Its power architecture features FlexPowerControl with five distinct low-power modes, including Shutdown (33 nA), Standby with RTC (420 nA), and Stop 2 (2.8 μA), all supported by independent voltage regulation, brownout reset (BOR) in all active modes, and hardware calendar-driven wake-up - critical for energy-constrained wearable health devices operating across -40 °C to 125 °C.

Key Specifications

Pinout & Package

STM32L4S7VIT6 is housed in LQFP100 (14 × 14 mm, 0.5 mm pitch) package with 100 leads, supporting full I/O remapping and 5 V-tolerant operation on most pins. The package includes dedicated VBAT, VREF+, VREF-, VSSA/VDDA analog supplies, and separate VSS/VDD domains for digital core, I/O, and USB.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L4S7VIT6, STM32L4R9AII6 trades MIPI DSI for extended temperature and GFXMMU enhancements, while STM32U575ZIT6 replaces display peripherals with TrustZone security and lower active power - making the L4S7VIT6 uniquely suited for cost-sensitive, display-rich ultra-low-power applications where MIPI DSI and LTDC are mandatory.

Availability

STM32L4S7VIT6 is available at Aetrix Electronics and suitable for portable medical monitors, industrial HMI gateways, smart energy meters, and wireless sensor nodes requiring stable component supply across long-lifecycle deployments.

Supply support for STM32L4S7VIT6 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 analog products for automotive, industrial, and consumer markets.

The STM32L4 series targets ultra-low-power embedded applications demanding high performance-per-milliwatt, featuring integrated graphics acceleration, hardware crypto, and flexible power management for battery-operated and energy-harvesting systems.

FAQ

What is the maximum operating frequency and associated performance metric?

The STM32L4S7VIT6 operates at up to 120 MHz with the ART Accelerator enabled, delivering 150 DMIPS (1.25 DMIPS/MHz) per Dhrystone 2.1 benchmark. Its CoreMark score is 409.20 (3.41 CoreMark/MHz), validated under full-speed Flash execution with prefetch disabled and cache enabled - confirming deterministic real-time throughput for motor control and audio processing.

Does this MCU support hardware-accelerated graphics and display interfaces?

Yes - it integrates both Chrom-ART Accelerator (DMA2D) for 2D graphics composition and Chrom-GRC (GFXMMU) for dynamic graphics memory mapping. It also features a full MIPI DSI Host controller (2 lanes, 500 Mbit/s each) and LCD-TFT controller supporting RGB888 up to XGA resolution - enabling direct drive of high-fidelity color displays without external display controllers.

What low-power modes are available and what are their typical current draws?

It offers five low-power modes: Shutdown (33 nA), Standby (125 nA), Standby with RTC (420 nA), Stop 2 with RTC (2.8 μA), and Run mode (110 μA/MHz). All modes retain SRAM content except Shutdown; Stop 2 wakes in 5 µs. These values are measured at 3.3 V, 25 °C, with ART enabled and code executing from Flash - verified per DS12024 Rev 4 Table 25.

Which security features are implemented in hardware?

Hardware security includes AES-128/256 and SHA-256 accelerators, 96-bit unique ID, true random number generator (TRNG) compliant with NIST SP800-90B, firewall for memory protection, and readout protection (ROP) with three levels. These features enable secure boot, firmware authentication, and encrypted data storage - confirmed in Sections 3.7, 3.30, and 3.31 of the datasheet.