{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STM8AL3166UCX","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STM8AL3166UCX","canonicalUrl":"https://icboms.com/stmicroelectronics/STM8AL3166UCX","factsUrl":"https://icboms.com/api/mcp/products/STM8AL3166UCX","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STM8A series STM8AL3166UCX, 8-bit STM8 core MCU, 16MHz, 32KB (32K x 8) FLASH, 2K x 8 RAM, 1K x 8 EEPROM, 30 I/O, 22x12b ADC, 1x12b DAC, 1.65V-3.6V, -40°C to 125°C, 32-VFQFN Exposed Pad.","salesMarkdown":"## NRND — last-time-buy window is the procurement reality This is the official lifecycle flag that tells procurement and engineering the part is in its phase-out trajectory — it remains available for existing production through the last-time-buy window, but no new design should commit to this order code. For a BOM line already using it, the immediate action is to secure final buys or qualify a replacement before the LTB closes. ## AEC-Q100 and 125°C — built for under-hood automotive That temperature grade puts it squarely in under-hood and engine-bay environments — powertrain control modules, transmission controllers, brake systems, and any ECU that lives near the engine block. The 1.65V to 3.6V supply range lets it run from a single lithium cell or a regulated 3.3V rail, which simplifies the power tree in space-constrained automotive modules. The EEPROM is useful for storing calibration constants and fault codes without wearing the Flash. The 30 I/O pins in a 32-VFQFN (5x5 mm) package give a good pin-to-footprint ratio for compact ECU designs. ## Brown-out detect and DMA for reliable operation On-chip brown-out detect/reset and a POR (power-on reset) keep the MCU from running in undefined low-voltage states — critical for automotive safety. The internal oscillator means no external crystal is needed for many applications, saving two pins and board space.","metaTitle":"STM8AL3166UCX STM8 8-bit MCU, 16MHz, 32KB Flash, AEC-Q100","metaDescription":"STM8AL3166UCX is an NRND automotive 8-bit MCU from STMicroelectronics. 16MHz core, 32KB Flash, 2K x 8 RAM, 1K x 8 EEPROM, -40°C to 125°C.","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~125°C(TA)","Supplier Device Package":"32-VFQFPN (5x5)","Voltage - Supply (Vcc/Vdd)":"1.65V ~ 3.6V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.9548","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/fcda9e9e20a5c37a9c561bb37d935f5e.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STM8AL3166UCX/alternatives.json"},"ai":{"faq":[{"question":"Can STM8AL3166UCX be used in new automotive designs?","answer":"No. The NRND status means STMicroelectronics does not recommend it for new designs. For a new automotive ECU, look at the current-production STM8A variants that share the same AEC-Q100 qualification and peripheral set."},{"question":"What is the replacement for STM8AL3166UCX?","answer":"The evidence does not list an official STMicroelectronics successor order code for STM8AL3166UCX. For a pin-compatible alternative within the STM8A family, review the current-production STM8AL3Lx or STM8AF52xx series — they share the same 32-VFQFN footprint and automotive qualification, though peripheral mix and memory sizes vary. Confirm exact compatibility against the target application's requirements."},{"question":"What are the complete specifications and pinout of STM8AL3166UCX?","answer":"Key specifications: 8-bit STM8 core at 16 MHz, 32 KB Flash, 2K x 8 RAM, 1K x 8 EEPROM, 30 I/O, 22-channel 12-bit ADC, 12-bit DAC, I²C/SPI/UART/LIN/IrDA connectivity, internal oscillator, brown-out detect, DMA, -40°C to 125°C, 1.65V to 3.6V supply, in a 32-VFQFN (5x5 mm) package. Pinout details are in the STM8AL3166 datasheet — the 32-VFQFN pin mapping is standard across the STM8AL3Lx density options."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STM8AL3166UCX","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STM8AL3166UCX 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}}