{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"HD4074318S","brand":"Renesas Electronics","brandSlug":"renesas","productSlug":"HD4074318S","canonicalUrl":"https://icboms.com/renesas/HD4074318S","factsUrl":"https://icboms.com/api/mcp/products/HD4074318S","rawCanonicalId":null},"summary":{"shortDescription":"Renesas HD4074318S, 4-bit OTPROM microcontroller, OTPROM program memory, Bulk package, active lifecycle.","salesMarkdown":"## 4-bit OTPROM controller — what it is and where it fits The Renesas HD4074318S is a 4-bit microcontroller with OTPROM program memory, designed for cost-sensitive embedded control applications where firmware is factory-programmed and locked for the product lifetime. The OTPROM means no field updates — the code is written once during manufacturing. Typical uses include appliance controllers, remote controls, and simple industrial timers where the program is stable and the unit volume justifies a one-time mask. ## OTPROM memory — no field updates possible Because the program memory is OTPROM, every HD4074318S leaves the factory with the firmware permanently written. There is no erase cycle, no reprogramming path. This is the right choice when the code is finalised before production and the BOM must avoid the cost of a Flash or EEPROM MCU. For prototyping, a UV-erasable windowed version or a Flash-based sibling in the same family would be needed — but that is a different order code.","metaTitle":"Renesas HD4074318S 4-Bit OTPROM Microcontroller, Active","metaDescription":"Renesas HD4074318S 4-bit OTPROM microcontroller. Active production.","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/8590a14daebe8ef2162e17145775effa.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the HD4074318S microcontroller used for?","answer":"The HD4074318S is a 4-bit OTPROM microcontroller used in cost-sensitive embedded control applications such as appliance controllers, remote controls, and simple industrial timers where firmware is factory-programmed and never updated in the field."},{"question":"Is HD4074318S an OTPROM?","answer":"Yes, the HD4074318S uses OTPROM (one-time programmable read-only memory) for its program store. The code is written once during manufacturing and cannot be erased or reprogrammed."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/renesas/HD4074318S","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/renesas/HD4074318S 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}}