{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"HN58C257AT85E","brand":"Renesas Electronics","brandSlug":"renesas","productSlug":"HN58C257AT85E","canonicalUrl":"https://icboms.com/renesas/HN58C257AT85E","factsUrl":"https://icboms.com/api/mcp/products/HN58C257AT85E","rawCanonicalId":null},"summary":{"shortDescription":"HN58C257AT85E, Parallel 256Kbit EEPROM, 32K x 8 organization, Bulk package, Active lifecycle.","salesMarkdown":"The HN58C257AT85E is a parallel-interface 256Kbit EEPROM from the HN58C257 series, organized as 32K x 8 bits. It is designed for nonvolatile storage in applications that need byte-level rewritability without battery backup — think configuration parameters, calibration constants, or firmware patches in industrial controllers, telecom line cards, and metering equipment. The parallel interface gives it a straightforward bus connection to most MCUs and FPGAs, with no SPI or I2C protocol overhead. ## Bulk delivery — practical for low-volume or repair That suits small-batch production runs, prototype builds, or MRO repair where you need a handful of devices rather than a full reel.","metaTitle":"HN58C257AT85E Parallel 256Kbit EEPROM, Active Lifecycle","metaDescription":"HN58C257AT85E is a parallel 256Kbit EEPROM from the HN58C257 series. Active lifecycle status.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Memory (DRAM / SRAM / Flash / EEPROM)"],"specifications":{"series":"*","package_type":"Bulk","product_status":"Active","lifecycle_stage":"eol_hot"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$15.14","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/94d2c98eef6d17494b2f2a08729d8cfe.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is HN58C257AT85E equivalent to or a replacement for other 256Kbit parallel EEPROMs like AT28C256?","answer":"The HN58C257AT85E is a 256Kbit parallel EEPROM in the same functional class as the AT28C256. Both are 32K x 8 devices with a parallel bus interface. Pin compatibility depends on the specific package variant — verify the footprint against your board's socket or solder pattern before substitution."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/renesas/HN58C257AT85E","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/renesas/HN58C257AT85E 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}}