{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"X28HC64S-15","brand":"Renesas Electronics","brandSlug":"renesas","productSlug":"X28HC64S-15","canonicalUrl":"https://icboms.com/renesas/X28HC64S-15","factsUrl":"https://icboms.com/api/mcp/products/X28HC64S-15","rawCanonicalId":null},"summary":{"shortDescription":"Renesas / Intersil X28HC64S-15, 64Kbit Parallel EEPROM, 8K x 8 organization, 150 ns access time, 4.5V supply, 0°C to 70°C, 28-SOIC surface mount.","salesMarkdown":"## 64Kbit parallel EEPROM — the legacy non-volatile workhorse The Renesas / Intersil X28HC64S-15 is a 64Kbit parallel EEPROM organized as 8K x 8 bits, with a 150 ns access time and a 4.5V supply rail. It uses a full parallel address and data bus — 13 address lines and 8 data lines — which makes it a direct drop-in for designs that already have a memory controller or an MCU with an external bus interface. The 28-pin SOIC package keeps the board footprint compact for a parallel memory of this density. ## Write cycle timing — 5 ms per word or page The write cycle time is 5 ms for a word or a page write. That is slow compared to SRAM or Flash — you cannot stream data into this EEPROM at bus speed. The 5 ms write window means the host must poll the device's ready/busy status (or wait a fixed 5 ms) before attempting the next write. For storing calibration constants, serial numbers, or configuration tables that change infrequently, this is fine. For high-frequency data logging, a serial EEPROM with a faster page-write cycle or an FRAM would be a better fit. This is a mature part with a stable supply — not a niche or obsolete component that forces a redesign down the line.","metaTitle":"X28HC64S-15 64Kbit Parallel EEPROM, 150 ns, 28-SOIC","metaDescription":"X28HC64S-15 64Kbit (8K x 8) parallel EEPROM with 150 ns access time, 4.5V supply, 0°C to 70°C. Active lifecycle.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Memory (DRAM / SRAM / Flash / EEPROM)"],"specifications":{"frame_size":"64Kbit","Access Time":"150 ns","memory_type":"Non-Volatile","package_type":"Bulk","Memory Format":"EEPROM","mounting_type":"Surface Mount","interface_type":"Parallel","product_status":"Active","lifecycle_stage":"eol_hot","supply_voltage_v":"4.5","Memory Organization":"8K x 8","Operating Temperature High":"0°C to 70°C(TA)","Write Cycle Time - Word, Page":"5ms"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$6.42","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://rocelec.widen.net/view/pdf/laradidc79/INSLS08072-1.pdf?t.download=true&u=5oefqw","sourceUrl":null},"ai":{"faq":[{"question":"What is the equivalent of X28HC64S-15?","answer":"The X28HC64S-15 is a 64Kbit parallel EEPROM in a 28-SOIC package. A functional equivalent would need the same 8K x 8 organization, 150 ns or faster access time, 4.5V supply, and parallel interface. The peer parts listed (M5M5W816WG-70HI#BT and M5M5V5636GP-16I#B0) are from different families and are not direct drop-in equivalents — verify pin compatibility and timing before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/renesas/X28HC64S-15","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/renesas/X28HC64S-15 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}}