STMicroelectronics STM32L4S9VIT6

Overview

STM32L4S9VIT6 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 for embedded graphics applications. It delivers 150 DMIPS, supports -40 °C to 125 °C operation, and achieves 420 nA Standby mode with RTC - enabling long-life battery-powered HMI and industrial display systems.

For engineers reviewing the STM32L4S9VIT6 datasheet, STM32L4S9VIT6 pinout, STM32L4S9VIT6 application, or STM32L4S9VIT6 equivalent, key selection criteria include its dual-bank Flash with read-while-write capability, hardware-accelerated Chrom-ART (DMA2D) and GFXMMU (Chrom-GRC), AES-256/HASH-256 crypto engine, and 136 fast I/Os (most 5 V-tolerant) supporting complex peripheral routing in space-constrained designs.

Technical Context

The STM32L4S9VIT6 integrates an adaptive real-time accelerator (ART Accelerator) enabling zero-wait-state execution from Flash at 120 MHz, alongside a multi-AHB interconnect matrix that decouples CPU, DMA, and peripheral bus access to sustain high throughput under mixed workloads. Its FlexPowerControl architecture implements seven low-power modes - including Shutdown (33 nA), Standby with RTC (420 nA), and Stop 2 with RTC (2.8 µA) - managed via dedicated power control registers and hardware event triggers.

It features dual Octo-SPI interfaces supporting XIP and memory-mapped execution from external flash, a 14-channel DMA controller with DMAMux routing, and advanced analog subsystems: two 12-bit DACs with sample-and-hold, two op-amps with programmable gain, and a 12-bit 5 Msps ADC with hardware oversampling up to 16-bit resolution - all operating from independent analog supplies for noise isolation.

Key Specifications

Pinout & Package

STM32L4S9VIT6 is housed in a LQFP100 (14 × 14 mm) package with 100 pins, 136 fast I/Os (most 5 V-tolerant), and independent supply domains for analog, digital, and USB sections. Pin functions support flexible peripheral remapping via 16 alternate function sets (AF0–AF15).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L4R9VIT6, the STM32L4S9VIT6 provides double Flash/SRAM and dual Octo-SPI for scalable firmware and external memory - critical for feature-rich HMIs; versus STM32U585VIT6, it retains native MIPI DSI/LTDC but trades some security and ultra-low-power efficiency for display integration.

Availability

STM32L4S9VIT6 is available at Aetrix Electronics and suitable for industrial HMI, portable medical monitors, smart energy meters, and automotive infotainment subsystems requiring stable component supply across extended product lifecycles.

Supply support for STM32L4S9VIT6 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 analog chips for industrial, automotive, and consumer markets.

The STM32L4 Series targets ultra-low-power embedded applications demanding rich graphics, cryptographic security, and extended battery life - optimized for intelligent edge devices with display, sensing, and connectivity.

FAQ

What is the maximum operating temperature range for STM32L4S9VIT6?

The STM32L4S9VIT6 is rated for industrial operation from -40 °C to +125 °C ambient temperature, validated per ST's qualification standards (AEC-Q100 Grade 2 available in VIT6 suffix variants). This enables deployment in harsh environments such as motor control cabinets, outdoor energy meters, and under-hood automotive subsystems where thermal margin is critical.

Does STM32L4S9VIT6 support hardware-accelerated graphics rendering?

Yes - it integrates the Chrom-ART Accelerator (DMA2D) for hardware-accelerated 2D graphics operations including memory copy, alpha blending, and pixel format conversion, plus Chrom-GRC (GFXMMU) for graphics memory optimization. These blocks reduce CPU load during GUI rendering and enable smoother animations at lower power than software-only solutions.

Can STM32L4S9VIT6 drive a display directly without external bridge ICs?

Yes - it features a full MIPI DSI Host controller (2 lanes, 500 Mbit/s each) and LCD-TFT controller (LTDC) with 24-bit RGB output, allowing direct connection to MIPI DSI or parallel RGB TFT panels. No external timing controller or bridge IC is required for standard display interfaces, simplifying PCB layout and reducing BOM count.

What debug interfaces are supported on STM32L4S9VIT6?

The device supports Serial Wire Debug (SWD) and JTAG via dedicated SWJ-DP port, plus Embedded Trace Macrocell (ETM) for instruction-level tracing. SWD is the recommended interface for production programming and debugging due to its 2-pin footprint and robustness; ETM enables real-time code flow analysis for performance tuning and certification evidence.