{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STM32L4S9AII6","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STM32L4S9AII6","canonicalUrl":"https://icboms.com/stmicroelectronics/STM32L4S9AII6","factsUrl":"https://icboms.com/api/mcp/products/STM32L4S9AII6","rawCanonicalId":null},"summary":{"shortDescription":"ST STM32L4S series, STM32L4S9AII6, ARM Cortex-M4 32-bit MCU, 120 MHz, 2 MB Flash, 640 KB RAM, 131 I/O, USB OTG, CAN, 169-UFBGA, -40 to 85 °C.","salesMarkdown":"## What this STM32L4S9AII6 brings to the board It packs 2 MB of Flash and 640 KB of RAM, giving firmware engineers room for complex code and large data buffers without external memory. At 120 MHz, this core runs DSP instructions and single-cycle MAC operations, which matters for real-time control loops or sensor fusion algorithms. The 640 KB RAM supports double-buffering for display or audio pipelines without thrashing. Compared to the STM32L151CBU6A — a Cortex-M3 at 32 MHz with 64 KB Flash — the STM32L4S9AII6 is in a different performance tier: more than triple the clock, 32x the Flash, and a much wider I/O count. For production buyers, that means the part is still in current manufacture and can be specified into new BOMs without an obsolescence risk window. ## 169-UFBGA — what the package means for assembly For PCB layout, that means via-in-pad or microvia fanout is typical; the 131 I/O signals will need at least four layers to route cleanly. For rework, the small body and tight pitch call for a pre-heat profile and X-ray inspection after placement.","metaTitle":"STM32L4S9AII6 MCU, ARM Cortex-M4, 120 MHz, 2 MB Flash","metaDescription":"STM32L4S9AII6 32-bit ARM Cortex-M4 MCU, 120 MHz, 2 MB Flash, 640 KB RAM, 131 I/O, USB OTG, CAN, -40 to 85 °C, 169-UFBGA.","metaKeywords":null},"attributes":{"series":"STM32L4S","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Mfr":"STMicroelectronics","Speed":"120MHz","Series":"STM32L4S","Package":"Tray","RAM Size":"640K x 8","Core Size":"32-Bit Single-Core","EEPROM Size":"-","Peripherals":"Brown-out Detect/Reset, DMA, LCD, POR, PWM, WDT","Connectivity":"CANbus, EBI/EMI, I²C, IrDA, LINbus, MMC/SD, SAI, SPI, UART/USART, USB OTG","Mounting Type":"Surface Mount","Number of I/O":"131","Core Processor":"ARM® Cortex®-M4","Package / Case":"169-UFBGA","Product Status":"Active","Data Converters":"A/D 14x12b; D/A 2x12b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"STM32L4S9","Program Memory Size":"2MB (2M x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"169-UFBGA (7x7)","Voltage - Supply (Vcc/Vdd)":"1.71V ~ 3.6V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$18.7400","priceTiers":[{"qty":1,"price":"$18.74000","currency":"USD"},{"qty":10,"price":"$17.22200","currency":"USD"},{"qty":25,"price":"$16.50840","currency":"USD"},{"qty":80,"price":"$14.54538","currency":"USD"},{"qty":416,"price":"$13.83151","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/801901ac73e8271122e5857a8f5a4736.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STM32L4S9AII6/alternatives.json"},"ai":{"faq":[{"question":"What is the maximum clock speed of STM32L4S9AII6?","answer":"The STM32L4S9AII6 runs at 120 MHz, which is the maximum core clock speed for this ARM Cortex-M4 device."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STM32L4S9AII6","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STM32L4S9AII6 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}