{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MC68HC11E0FU","brand":"NXP Semiconductors","brandSlug":"nxp","productSlug":"MC68HC11E0FU","canonicalUrl":"https://icboms.com/nxp/MC68HC11E0FU","factsUrl":"https://icboms.com/api/mcp/products/MC68HC11E0FU","rawCanonicalId":null},"summary":{"shortDescription":"NXP MC68HC11E0FU, 8-bit microcontroller, M68HC11 core, 2 MHz, ROMless, 3 V supply, 16 I/O, SCI, SPI, A/D 8x8b, PQFP64, surface mount.","salesMarkdown":"The NXP MC68HC11E0FU is an 8-bit microcontroller built around the M68HC11 CPU core, running at 2 MHz. It is a ROMless device — there is no on-chip program memory — so the firmware must reside in an external ROM, EPROM, or Flash memory connected via the external bus. The part includes 16 general-purpose I/O lines, an SCI and SPI serial interface, an 8-channel 8-bit ADC, a power-on reset (POR) and watchdog timer (WDT), and an internal oscillator. It is supplied at 3 V and comes in a 64-pin PQFP package for surface-mount assembly. Typical applications include industrial control, embedded instrumentation, and automotive body electronics where a mature, well-documented 8-bit architecture is preferred. ## ROMless design — planning the external memory Because the MC68HC11E0FU has no internal program memory, the BOM must include an external memory device — typically a parallel EPROM, OTP ROM, or Flash — plus address latches and decoding logic. The external bus interface is part of the M68HC11 architecture, so the memory map and chip-select logic need to be designed from scratch. This adds board area and component count compared to a masked-ROM or Flash-based MCU, but it gives flexibility in firmware updates (if Flash is used) and avoids NRE for mask ROMs in low-to-medium volumes.","metaTitle":"MC68HC11E0FU 8-bit MCU, M68HC11 core, 2 MHz, ROMless, PQFP64","metaDescription":"MC68HC11E0FU 8-bit microcontroller from the M68HC11 family. 2 MHz, 3 V supply, ROMless with external program memory. 16 I/O, SCI/SPI, 8x8b ADC.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"has_mpn":"MC68HC11","cpu_core":"M68HC11","frequency":"2 MHz","frame_size":"8-Bit","fuse_speed":"2 MHz","connectivity":"SCI, SPI","package_type":"Bulk","Number Of I/O":"16","mounting_type":"Surface Mount","product_status":"Active","Data Converters":"A/D 8x8b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","peripheral_types":"POR, WDT","supply_voltage_v":"3.0","Program Memory Type":"ROMless"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$10.14","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/da199b418e8ea31e8c0f0f95bb9a6d88.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/MC68HC11E0FU/alternatives.json"},"ai":{"faq":[{"question":"Is the MC68HC11E0FU ROMless and how is program memory implemented?","answer":"Yes, the MC68HC11E0FU is ROMless — it has no on-chip program memory. Firmware must be stored in an external memory device (EPROM, OTP ROM, or parallel Flash) connected via the external bus interface of the M68HC11 core."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/nxp/MC68HC11E0FU","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/nxp/MC68HC11E0FU 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}}