{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY8C3866AXI-039","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY8C3866AXI-039","canonicalUrl":"https://icboms.com/infineon/CY8C3866AXI-039","factsUrl":"https://icboms.com/api/mcp/products/CY8C3866AXI-039","rawCanonicalId":null},"summary":{"shortDescription":"Infineon Technologies PSoC® 3 CY8C38xx series, CY8C3866AXI-039, 8-bit 8051 MCU, 67 MHz, 64KB Flash, 8K x 8 RAM, 100-TQFP, -40°C to 85°C.","salesMarkdown":"## Active production, no last-time-buy pressure The CY8C3866AXI-039: RoHS3 compliant, no lead or restricted substances that would trip up global shipping or end-of-life recycling mandates. ## 8051 core at 67 MHz with mixed-signal muscle An 8-bit 8051 core clocked at 67 MHz — that is the throughput ceiling for the CPU, but the real story is the analog front-end. A 16-channel, 20-bit delta-sigma ADC array lets you read multiple sensors without an external multiplexer or precision reference; the 4-channel 8-bit DAC handles analog output loops. On-chip CapSense means you can implement touch buttons or sliders without a separate controller, and the LCD drive peripheral drives a segment display directly — both save board space and BOM cost.","metaTitle":"CY8C3866AXI-039 PSoC 3 MCU, 8-bit 8051, 67 MHz, 64KB Flash","metaDescription":"Infineon CY8C3866AXI-039 PSoC 3 MCU: 8-bit 8051 core at 67 MHz, 64KB Flash, 20-bit ADC array, CapSense, USB. Active production, RoHS3. Sourced to order.","metaKeywords":null},"attributes":{"series":"PSOC® 3 CY8C38xx","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Speed":"67MHz","Series":"PSOC® 3 CY8C38xx","Package":"Tray","RAM Size":"8K x 8","Core Size":"8-Bit","EEPROM Size":"2K x 8","Peripherals":"CapSense, DMA, LCD, POR, PWM, WDT","Connectivity":"EBI/EMI, I²C, LINbus, SPI, UART/USART, USB","Mounting Type":"Surface Mount","Number of I/O":"62","Core Processor":"8051","Package / Case":"100-LQFP","Data Converters":"A/D 16x20b; D/A 4x8b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Program Memory Size":"64KB (64K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"100-TQFP (14x14)","Voltage - Supply (Vcc/Vdd)":"1.71V ~ 5.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$23.06","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$23.06000","currency":"USD"},{"qty":10,"price":"$21.26800","currency":"USD"},{"qty":25,"price":"$20.31200","currency":"USD"},{"qty":90,"price":"$18.16144","currency":"USD"},{"qty":270,"price":"$17.32504","currency":"USD"},{"qty":450,"price":"$16.48864","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/bce109168f5bfb1a2b6d3f9ab94fe849.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy CY8C3866AXI-039 and what is the lead time?","answer":"Submit an RFQ for a firm lead-time estimate."},{"question":"What is the closest pin-compatible alternative to CY8C3866AXI-039?","answer":"Within the PSoC 3 CY8C38xx family, the CY8C3866AXI-039 is the 64KB Flash, 67 MHz variant. A lower-memory sibling (CY8C3856AXI, 32KB Flash) shares the same 100-TQFP footprint and pinout, but the Flash size is halved — check your code size before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY8C3866AXI-039","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY8C3866AXI-039 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:45:10.375Z","lastPublished":"2026-07-22T19:45:10.375Z","indexable":true}}