{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STM8AF5289TAY","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STM8AF5289TAY","canonicalUrl":"https://icboms.com/stmicroelectronics/STM8AF5289TAY","factsUrl":"https://icboms.com/api/mcp/products/STM8AF5289TAY","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STM8A series, STM8AF5289TAY, 8-bit MCU, 24MHz, 64KB Flash, 6K x 8 RAM, 2K x 8 EEPROM, 52 I/O, CAN/I²C/LIN/SPI/UART, 64-LQFP, -40°C to 85°C.","salesMarkdown":"## 8-bit MCU for automotive body control — now obsolete The STMicroelectronics STM8AF5289TAY is an 8-bit microcontroller from the STM8A automotive series, built around the STM8A core running at 24 MHz. Connectivity covers CAN, I²C, LIN, SPI, and UART — a fit for body-control modules, gateway nodes, and sensor interfaces in automotive and industrial environments. ## Obsolete — no direct replacement on record The STM8AF5289TAY carries an official lifecycle status of Obsolete. Availability and pricing vary; each lot should be quoted to order, with date code and condition confirmed before commitment. ## What the 24 MHz core and 64 KB Flash mean for fit At 24 MHz the STM8A core delivers enough throughput for CAN message handling, LIN master/slave scheduling, and local sensor polling without a coprocessor. The 64 KB Flash is sized for mid-complexity firmware — a bootloader, communication stack, and application logic — with the 2 KB EEPROM holding calibration or configuration data across resets. The 6K x 8 RAM supports moderate buffering for CAN frames and UART streams; if your application requires larger packet buffers or a real-time OS with multiple task stacks, check the memory footprint early in the porting effort. ## Sourcing this part for production or repair Because the STM8AF5289TAY is obsolete, it is not available through standard factory distribution. For a production BOM that cannot redesign, securing a last-time-buy buffer or a qualified broker lot is the practical path.","metaTitle":"STM8AF5289TAY 8-bit MCU, 64 KB Flash, 24 MHz, obsolete","metaDescription":"STMicroelectronics STM8AF5289TAY 8-bit MCU with 64 KB Flash, 6K x 8 RAM, 24 MHz core, -40°C to 85°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Mfr":"STMicroelectronics","Speed":"24MHz","Series":"STM8A","Package":"Tray","RAM Size":"6K x 8","Core Size":"8-Bit","EEPROM Size":"2K x 8","Peripherals":"Brown-out Detect/Reset, POR, PWM, WDT","Connectivity":"CANbus, I²C, LINbus, SPI, UART/USART","Mounting Type":"Surface Mount","Number of I/O":"52","Core Processor":"STM8A","Package / Case":"64-LQFP","Product Status":"Obsolete","Data Converters":"A/D 16x10b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"STM8","Program Memory Size":"64KB (64K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C ~ 85°C (TA)","Voltage - Supply (Vcc/Vdd)":"3V ~ 5.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.8169","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/a76a247b2d898b9b81fdf0b841467bbd.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STM8AF5289TAY/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy STM8AF5289TAY?","answer":"The STM8AF5289TAY is obsolete and not stocked by the factory."},{"question":"Is STM8AF5289TAY obsolete?","answer":"Yes, the STM8AF5289TAY carries an official obsolete lifecycle status. No factory successor is listed, so any replacement requires a redesign with a different part."},{"question":"What is the replacement for STM8AF5289TAY?","answer":"The STM8AF5289TAY is obsolete without a direct pin-compatible successor from ST. A redesign using a current STM8A or STM32 device would be needed to maintain supply."},{"question":"What is STM8AF5289TAY's core speed?","answer":"The STM8A core runs at 24 MHz, enough for CAN/LIN communication and sensor processing in body-control applications."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STM8AF5289TAY","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STM8AF5289TAY 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}}