{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STM8AL3166UAY","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STM8AL3166UAY","canonicalUrl":"https://icboms.com/stmicroelectronics/STM8AL3166UAY","factsUrl":"https://icboms.com/api/mcp/products/STM8AL3166UAY","rawCanonicalId":null},"summary":{"shortDescription":"ST STM8A series, STM8AL3166UAY, 8-bit MCU, STM8 core, 16 MHz, 32 KB Flash, 2K x 8 RAM, 1K x 8 EEPROM, 30 I/O, I²C/IrDA/LIN/SPI/UART, 12-bit ADC/DAC, 1.65-3.6 V, -40 to 85 °C, 32-VFQFN.","salesMarkdown":"## 8-bit automotive MCU with LIN and analog integration That means ST has stopped actively promoting it for new projects, though existing production runs may still be fulfilled through the channel. ## What the 16 MHz STM8 core and peripherals mean for the BOM The 16 MHz clock rate is the ceiling for the STM8 core on this part — enough for LIN message handling, ADC sampling at several kilohertz, and general-purpose control loops, but not a fit for high-speed DSP or video. The 32 KB Flash and 2 KB RAM limit firmware complexity to mid-range automotive tasks: window lift, seat position memory, steering-column control, or HVAC actuator drivers. The 1 KB EEPROM is useful for calibration constants and fault codes that survive a power cycle without external storage. The 30 I/O in a 32-pin VFQFN package leave few spare pins — the layout needs to commit the ADC inputs, LIN transceiver, and SPI bus early in the pin assignment. The industrial temperature grade covers cabin and under-hood automotive environments that stay within that window; for 125 °C-rated applications, a different STM8A variant would be required.","metaTitle":"STM8AL3166UAY 8-bit MCU, 16 MHz, 32 KB Flash, AEC-Q100, NRND","metaDescription":"STM8AL3166UAY 8-bit automotive MCU, STM8 core at 16 MHz, 32 KB Flash, 2K RAM, 1K EEPROM, LIN/I²C/SPI, AEC-Q100.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"NRND","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Mfr":"STMicroelectronics","Speed":"16MHz","Series":"Automotive, AEC-Q100, STM8A","Package":"Tray","RAM Size":"2K x 8","Core Size":"8-Bit","EEPROM Size":"1K x 8","Peripherals":"Brown-out Detect/Reset, DMA, POR, PWM, WDT","Connectivity":"I²C, IrDA, LINbus, SPI, UART/USART","Mounting Type":"Surface Mount","Number of I/O":"30","Core Processor":"STM8","Package / Case":"32-VFQFN Exposed Pad","Product Status":"Not For New Designs","Data Converters":"A/D 22x12b; D/A 1x12b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"STM8","Program Memory Size":"32KB (32K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"32-VFQFPN (5x5)","Voltage - Supply (Vcc/Vdd)":"1.65V ~ 3.6V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.2600","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/fcda9e9e20a5c37a9c561bb37d935f5e.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STM8AL3166UAY/alternatives.json"},"ai":{"faq":[{"question":"Is STM8AL3166UAY obsolete or NRND?","answer":"It is not fully discontinued, but ST is winding down support. Existing production may still be available through the channel, but new designs should target a currently-active STM8A sibling."},{"question":"What is the best replacement for STM8AL3166UAY?","answer":"A pin-compatible replacement within the STM8AL family would be a currently-active device with the same 32-VFQFN footprint, 30 I/O, and STM8 core. The STM8AL3166U3 is a known sibling in the same package and memory tier; verify the exact order code for active lifecycle status before substituting. For new designs, ST recommends moving to a non-NRND STM8A part with matching Flash and RAM."},{"question":"Does STM8AL3166UAY support CAN or LIN interface?","answer":"It supports LINbus via the UART peripheral with LIN protocol handling, but does not include a CAN controller. The connectivity list covers I²C, IrDA, LINbus, SPI, and UART/USART — CAN is not present on this part."},{"question":"What is STM8AL3166UAY's listed speed and series?","answer":"The core runs at 16 MHz. It belongs to the Automotive, AEC-Q100 qualified STM8A series, which is ST's 8-bit line for vehicle body electronics."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STM8AL3166UAY","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STM8AL3166UAY when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T18:03:28.771Z","lastPublished":"2026-07-22T18:03:28.771Z","indexable":true}}