STMicroelectronics STM32L4S9ZIJ6TR

Overview

STM32L4S9ZIJ6TR 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 + LCD-TFT controller. It delivers 150 DMIPS and supports advanced graphics for embedded HMI applications requiring high-resolution display, cryptographic security (AES-256/HASH), and sub-μA low-power operation.

For engineers reviewing the STM32L4S9ZIJ6TR datasheet, STM32L4S9ZIJ6TR pinout, STM32L4S9ZIJ6TR application, or STM32L4S9ZIJ6TR equivalent, key selection factors include its dual-bank read-while-write Flash architecture, 24-channel capacitive touch sensing, hardware-accelerated Chrom-ART (DMA2D) and GFXMMU, and verified 420 nA Standby-with-RTC current at 85 °C.

Technical Context

This MCU 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 throughput under mixed workloads. Its FlexPowerControl architecture supports seven low-power modes-including Shutdown (33 nA), Standby with RTC (420 nA), and Stop 2 with RTC (2.8 μA)-with brownout reset active in all except Shutdown mode.

The device features three independent PLLs (system, USB/audio, ADC), dual Octo-SPI interfaces supporting XIP and memory-mapped execution, and a dedicated MIPI D-PHY layer with two DSI lanes operating up to 500 Mbit/s each-enabling direct connection to high-speed display panels without external bridge ICs.

Key Specifications

Pinout & Package

STM32L4S9ZIJ6TR is housed in a UFBGA144 package (10 × 10 mm, 0.4 mm ball pitch), optimized for compact HMI designs with high I/O density and thermal efficiency. The package supports 136 fast I/Os (most 5 V-tolerant) and independent I/O supply down to 1.08 V for interfacing with diverse voltage domains.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L4R9ZIJ6, the STM32L4S9ZIJ6TR adds MIPI DSI and Chrom-GRC for display-centric designs; versus STM32U575ZIT6, it trades TrustZone for proven graphics acceleration and broader analog integration - making it optimal for cost-sensitive, battery-powered HMIs demanding rich visuals.

Availability

STM32L4S9ZIJ6TR is available at Aetrix Electronics and suitable for smart home displays, industrial HMI terminals, portable medical monitors, and secure IoT gateways requiring stable component supply, long-term lifecycle assurance, and full technical documentation support.

Supply support for STM32L4S9ZIJ6TR 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 components for industrial, automotive, and consumer markets.

The STM32L4S9xx series belongs to ST's ultra-low-power MCU product line, engineered specifically for battery-operated human-machine interface applications demanding high-resolution graphics, cryptographic security, and multi-year operational lifetime on compact energy sources.

FAQ

What is the maximum operating temperature range for STM32L4S9ZIJ6TR?

The STM32L4S9ZIJ6TR is rated for industrial operation from –40 °C to +85 °C, with extended qualification up to +125 °C per ST's production data. This rating is validated across all low-power modes and peripheral functions, including MIPI DSI timing compliance and Flash endurance at temperature extremes.

Does STM32L4S9ZIJ6TR support external SDRAM via FSMC?

No - the STM32L4S9ZIJ6TR does not integrate a Flexible Static Memory Controller (FSMC). Instead, it provides two Octo-SPI interfaces supporting PSRAM, NOR, NAND, and FRAM memories with XIP capability. External SDRAM requires bridging via FPGA or external controller; ST recommends PSRAM for high-bandwidth frame buffer use cases.

How many MIPI DSI lanes does STM32L4S9ZIJ6TR support, and what is the maximum data rate?

The STM32L4S9ZIJ6TR integrates a single MIPI DSI Host controller with two configurable DSI lanes, each capable of 500 Mbit/s in high-speed mode, yielding up to 1 Gbit/s aggregate bandwidth. It supports video mode only (no command mode), and requires external D-PHY termination resistors per MIPI specification.

Is the 2 MB Flash memory organized as a single bank or dual banks?

The 2 MB Flash is physically divided into two independent banks (Bank 1: 1 MB, Bank 2: 1 MB), enabling true read-while-write operation: one bank can execute code while the other is erased or programmed. This architecture is essential for robust over-the-air firmware updates with guaranteed rollback capability.