STMicroelectronics STM32L4S5QII6

Overview

STM32L4S5QII6 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.

For engineers reviewing the STM32L4S5QII6 datasheet, STM32L4S5QII6 pinout, STM32L4S5QII6 application, or STM32L4S5QII6 equivalent, key selection criteria include ultra-low-power runtime (110 µA/MHz), dual-bank read-while-write Flash, hardware-accelerated graphics (Chrom-ART/DMA2D + GFXMMU), AES-256/HASH-256 crypto acceleration, and 136 fast I/Os with 5 V tolerance.

Technical Context

The STM32L4S5QII6 integrates an adaptive real-time memory accelerator (ART Accelerator) enabling zero-wait-state execution from Flash at 120 MHz, and a multi-AHB interconnect matrix supporting concurrent access to Flash, SRAM, and peripherals. Its FlexPowerControl architecture enables seven low-power modes - including 33 nA Shutdown and 420 nA Standby with RTC - managed via dedicated power control logic and brownout reset across all active modes.

It features dual Octo-SPI interfaces for external memory expansion, a 14-channel DMA controller with DMAMux routing, and a dedicated interconnect matrix for peripheral-to-peripheral transfers without CPU intervention. The device includes two independent analog domains with 12-bit ADC (5 Msps), dual 12-bit DACs, two op-amps with PGA, and two ultra-low-power comparators - all supported by separate analog supply pins.

Key Specifications

Pinout & Package

STM32L4S5QII6 is housed in a 132-pin Ultra-Fine-Pitch Ball Grid Array (UFBGA132) package with 0.4 mm ball pitch and 7 mm × 7 mm body size. This package supports high I/O density (136 fast I/Os) while maintaining thermal performance for extended industrial temperature operation (-40 °C to 125 °C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L4R9AIY6, the STM32L4S5QII6 offers identical graphics performance in a more manufacturable UFBGA package; versus STM32L562VEQ6, it trades security extensions for integrated display subsystems - making it optimal for cost-sensitive, graphics-rich industrial UIs rather than certified secure endpoints.

Availability

STM32L4S5QII6 is available at Aetrix Electronics and suitable for medical wearables, industrial HMI panels, smart energy meters, and portable diagnostic devices requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for STM32L4S5QII6 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 components for industrial, automotive, and consumer markets.

The STM32L4 series targets ultra-low-power embedded applications demanding rich peripherals, graphics capability, and energy efficiency - specifically engineered for battery-operated HMIs, portable medical devices, and intelligent IoT edge nodes.

FAQ

What is the maximum operating temperature range for STM32L4S5QII6?

The STM32L4S5QII6 is qualified for industrial and extended temperature operation from -40 °C to +125 °C, as confirmed in Section 6.3.1 of the DS12024 Rev 4 datasheet. This rating applies to all functional modes including Run, Stop, and Standby, and is validated under specified voltage and load conditions.

Does STM32L4S5QII6 support hardware-accelerated SHA-256?

Yes - the device integrates a dedicated HASH hardware accelerator supporting SHA-224 and SHA-256 algorithms, as documented in Section 3.31 of the datasheet. It operates independently of the CPU, processes data in 512-bit blocks, and provides completion interrupts and result registers accessible via APB bus.

How many MIPI DSI data lanes does STM32L4S5QII6 implement?

The STM32L4S5QII6 implements two MIPI DSI data lanes (DAT0 and DAT1) plus one clock lane (CLK), as specified in Section 3.26 and Table 2 of the datasheet. Each data lane supports up to 500 Mbit/s, enabling WVGA or HD resolution display links at 60 Hz refresh rates.

Is the UFBGA132 package of STM32L4S5QII6 compatible with standard reflow profiles?

Yes - the UFBGA132 package complies with JEDEC J-STD-020 moisture sensitivity level 3 (MSL3) and supports standard Pb-free reflow profiles (peak 260 °C, 10–30 sec above 217 °C), per Section 7.5 of DS12024 Rev 4. Recommended stencil aperture is 0.35 mm × 0.35 mm with 0.12 mm thickness for reliable solder joint formation.