{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DS80C320-MEL","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"DS80C320-MEL","canonicalUrl":"https://icboms.com/analog-devices/DS80C320-MEL","factsUrl":"https://icboms.com/api/mcp/products/DS80C320-MEL","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices 80C series high-speed microcontroller, DS80C320-MEL, 8-bit 8051 core, 256 x 8 RAM, ROMless, through-hole, 4.5V-5.5V supply.","salesMarkdown":"## Core architecture and memory fit The DS80C320-MEL is an 8-bit microcontroller built around the 8051 core, running at the high-speed architecture of the 80C series from Analog Devices. It carries 256 x 8 bytes of on-chip RAM and is ROMless — program memory must be supplied externally via the EBI/EMI bus. ## Supply rail and peripheral set On-chip peripherals include a power-fail reset and a watchdog timer. The power-fail reset asserts the reset pin when Vcc drops below the trip threshold, protecting the external memory from corrupted writes during a brownout. The WDT guards against firmware lock-ups in unattended or safety-critical loops. Connectivity is handled by a serial I/O (SIO) and a full-duplex UART/USART — enough for a debug console, a Modbus RTU link, or a simple sensor poll over RS-232 or RS-485 with an external transceiver. ## Package and board integration The DS80C320-MEL is a through-hole part — the MEL suffix indicates a specific package variant. Through-hole mounting simplifies hand-assembly and rework, and the pin spacing is wide enough that a two-layer board can route the address/data bus without vias. Because the part is ROMless, the external memory bus (EBI/EMI) must be routed to a separate flash or SRAM — the trace length matching and decoupling on the bus lines matter more for signal integrity at high clock speeds than the MCU package itself.","metaTitle":"DS80C320-MEL 8-Bit 8051 MCU, ROMless, 256x8 RAM","metaDescription":"DS80C320-MEL high-speed 8051 MCU from Analog Devices. 8-bit core, 256 x 8 RAM, ROMless, 4.5-5.5V. Active production. Quoted to order.","metaKeywords":null},"attributes":{"series":"80C","packageCase":null,"mountingType":null,"rohsStatus":"Not applicable","productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Series":"80C","Package":"Bulk","RAM Size":"256 x 8","Core Size":"8-Bit","Peripherals":"Power-Fail Reset, WDT","Connectivity":"EBI/EMI, SIO, UART/USART","Mounting Type":"Through Hole","Core Processor":"8051","lifecycle_stage":"eol_hot","Program Memory Type":"ROMless","Voltage - Supply (Vcc/Vdd)":"4.5V ~ 5.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$30.67","stockQuantity":0,"priceTiers":[{"qty":10,"price":"$30.67000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/71f26e53aa7d8879515e1a8cf92f8708.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the DS80C320-MEL's core and memory architecture?","answer":"It is an 8-bit 8051 core with 256 x 8 bytes of on-chip RAM. The program memory type is ROMless, so all firmware must be stored in an external memory device accessed through the EBI/EMI bus."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/DS80C320-MEL","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/DS80C320-MEL when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}