{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"HD407A4669H","brand":"Renesas Electronics","brandSlug":"renesas","productSlug":"HD407A4669H","canonicalUrl":"https://icboms.com/renesas/HD407A4669H","factsUrl":"https://icboms.com/api/mcp/products/HD407A4669H","rawCanonicalId":null},"summary":{"shortDescription":"HD407A4669H, 4-bit OTPROM microcontroller, 8 MHz, Bulk packaging, Active lifecycle.","salesMarkdown":"## What this 4-bit OTPROM microcontroller is The HD407A4669H: It is a one-time-programmable device — the program memory is written at the factory or during board-level programming and cannot be electrically erased or rewritten in the field. This makes it a fit for cost-sensitive, high-volume embedded control applications where firmware is locked early in production and no field updates are needed. Typical environments include appliance controllers, remote controls, and simple industrial timers where the 4-bit architecture handles basic I/O and logic tasks without the overhead of a larger MCU. ## OTP memory — no field updates possible Because the HD407A4669H uses OTPROM (one-time programmable read-only memory), the firmware is permanent after programming. This is a deliberate design choice for applications where the code is stable, the volume justifies a one-time mask or programming step, and the cost of a reprogrammable Flash MCU is not warranted. For a BOM line, this means the firmware revision must be final before the part is programmed — any bug fix or feature change after that point requires a new device. The 8 MHz clock is sufficient for polling I/O, driving small displays, or managing simple state machines, but not for high-speed data processing or complex protocol stacks.","metaTitle":"HD407A4669H 4-bit OTPROM Microcontroller, 8 MHz, Active","metaDescription":"HD407A4669H is a 4-bit OTPROM microcontroller rated at 8 MHz. Ideal for legacy embedded control where field updates are not required.","metaKeywords":null},"attributes":{"series":"*","packageCase":null,"mountingType":null,"rohsStatus":"Not applicable","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Series":"*","Package":"Bulk","lifecycle_stage":"eol_hot"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$11.32","stockQuantity":0,"priceTiers":[{"qty":27,"price":"$11.32000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/976e9fe7958f71480ca7a3e90482f9c6.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Can HD407A4669H be programmed again or is it one-time programmable?","answer":"It is programmed once and cannot be erased or reprogrammed. Firmware must be finalized before programming."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/renesas/HD407A4669H","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/renesas/HD407A4669H 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}}