{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DS80C390-FNR+","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"DS80C390-FNR","canonicalUrl":"https://icboms.com/analog-devices/DS80C390-FNR","factsUrl":"https://icboms.com/api/mcp/products/DS80C390-FNR%2B","rawCanonicalId":null},"summary":{"shortDescription":"Maxim Integrated DS80C390-FNR+, 8-bit 8051 MCU, 40MHz, 4K x 8 RAM, ROMless, CANbus, UART, 32 I/O, 3.85V–5.5V, -40°C to 85°C, 64-LQFP.","salesMarkdown":"## What this 8051-based MCU brings to the board The Maxim Integrated DS80C390-FNR+ is an 8-bit microcontroller built around the 8051 core, clocked at 40 MHz. It's a ROMless device — there's no internal program memory — so you pair it with external Flash or ROM via the external bus interface (EBI/EMI). The 4K x 8 internal RAM handles scratchpad and stack. This part is aimed at industrial control, automotive networking, and any application needing a proven 8051 architecture with CANbus on-chip. ## Package and mounting The 40 MHz clock is the maximum internal operating frequency. For a standard 8051 core, most instructions execute in 4 clocks. ## Peripheral set for control and comms 32 general-purpose I/O pins are available. The supply range is 3.85 V to 5.5 V. ## Package, temperature, and environment Housed in a 64-LQFP (10x10 mm) surface-mount package, the DS80C390-FNR+ operates from -40°C to 85°C. ## Lifecycle and compliance The DS80C390-FNR+ is listed as Active in production. That means no last-time-buy clock is ticking, and you can plan for ongoing builds without worrying about a sudden EOL. It is RoHS3 compliant, so it meets the latest EU restriction requirements for lead and other substances.","metaTitle":"DS80C390-FNR+ 8-bit MCU, 8051 core, 40MHz, 64-LQFP","metaDescription":"Maxim Integrated DS80C390-FNR+ 8-bit microcontroller, 8051 core at 40MHz, 4K x 8 RAM, ROMless, CANbus, -40°C to 85°C, 64-LQFP. Active, RoHS3.","metaKeywords":null},"attributes":{"series":"80C","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["DC-DC Power Modules"],"specifications":{"Speed":"40MHz","Series":"80C","Package":"Tray","RAM Size":"4K x 8","Core Size":"8-Bit","Peripherals":"Power-Fail Reset, WDT","Connectivity":"CANbus, EBI/EMI, SIO, UART/USART","Mounting Type":"Surface Mount","Number of I/O":"32","Core Processor":"8051","Package / Case":"64-LQFP","Oscillator Type":"External","lifecycle_stage":"eol_hot","Program Memory Type":"ROMless","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"64-LQFP (10x10)","Voltage - Supply (Vcc/Vdd)":"3.85V ~ 5.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$38.73","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$38.73000","currency":"USD"},{"qty":10,"price":"$35.72200","currency":"USD"},{"qty":25,"price":"$34.11680","currency":"USD"},{"qty":160,"price":"$30.50444","currency":"USD"},{"qty":320,"price":"$29.09963","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/859f0c819f2d5be2c2e6d9cb64e54fda.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Does the DS80C390-FNR+ require external memory?","answer":"Yes, the DS80C390-FNR+ is ROMless, meaning it has no internal program memory. You must connect external Flash or ROM via the EBI/EMI interface to store and execute code."},{"question":"Is the DS80C390-FNR+ RoHS compliant?","answer":"Yes, the DS80C390-FNR+ is RoHS3 compliant, meeting the latest EU restriction requirements."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/DS80C390-FNR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/DS80C390-FNR when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}