{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"71V3579S80PFGI","brand":"Renesas Electronics","brandSlug":"renesas","productSlug":"71V3579S80PFGI","canonicalUrl":"https://icboms.com/renesas/71V3579S80PFGI","factsUrl":"https://icboms.com/api/mcp/products/71V3579S80PFGI","rawCanonicalId":null},"summary":{"shortDescription":"71V3579S80PFGI SRAM - Synchronous, SDR, 4.5Mbit (256K x 18), 100 MHz, 8 ns access, 3.3V, -40 to +85°C, 100-TQFP (14x14), Bulk.","salesMarkdown":"## Active production, industrial temp range The 71V3579S80PFGI: Organised 256K x 18, the extra two bits per word are useful for parity or ECC storage on a 16-bit data bus — common in networking gear and industrial controllers where a single-bit error on a cache line stalls a conveyor. Industrial temperature range (-40 to +85 °C) means it lives in an unheated cabinet or a rooftop telecom enclosure without derating the access time. The 3.135 V to 3.465 V supply rail is a tight 3.3 V ±5 % — the core logic on the same rail must stay within that window or the SRAM's internal PLL (if any) may lose lock. ## Package and footprint for the board layout 100-TQFP (14x14 mm) with 0.5 mm pitch — the same footprint as many mid-density synchronous SRAMs and NOR flash parts. The 100-LQFP case code means the body is 14 mm square with a 1.4 mm height; the exposed pad is absent on TQFP, so all thermal dissipation goes through the leads. A four-layer board with a solid ground plane under the package is the safe bet for signal integrity at 100 MHz. Bulk packaging — tray or tube, not tape-and-reel — so this is a prototyping or low-volume production buy. No reel fee, but the pick-and-place feeder needs a tray shaker or tube handler. ## What the 8 ns access time means on the bench 8 ns access at 100 MHz is a 1-cycle latency on reads — the address is presented on clock edge N, data is valid on clock edge N+1. If the downstream FPGA or ASIC expects data on the same edge, the timing budget is tight: the 8 ns includes the clock-to-output delay plus the output hold time. A scope probe on the data lines with a 10 pF load will show the real edge rate; the datasheet's AC timing table is the reference, not the 100 MHz number alone.","metaTitle":"71V3579S80PFGI SRAM 4.5Mbit 100MHz 8ns 100-TQFP","metaDescription":"71V3579S80PFGI synchronous SRAM, 4.5Mbit, 100 MHz clock, 8 ns access, 3.3V, -40 to +85°C. Active production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Package":"Bulk","Technology":"SRAM - Synchronous, SDR","Access Time":"8 ns","Memory Size":"4.5Mbit","Memory Type":"Volatile","Memory Format":"SRAM","Mounting Type":"Surface Mount","Package / Case":"100-LQFP","Clock Frequency":"100 MHz","lifecycle_stage":"eol_hot","Memory Interface":"Parallel","Voltage - Supply":"3.135V ~ 3.465V","Memory Organization":"256K x 18","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"100-TQFP (14x14)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$5.93","priceTiers":[{"qty":51,"price":"$5.93000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/e92c84c29ece1cfa5c000f31d863a9a0.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/71V3579S80PFGI/alternatives.json"},"ai":{"faq":[{"question":"What is the memory organisation and interface of this SRAM?","answer":"The 71V3579S80PFGI is organised as 256K words by 18 bits (4.5 Mbit total) with a parallel memory interface. The 18-bit word width allows a 16-bit data bus plus two parity/ECC bits per word."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/renesas/71V3579S80PFGI","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/renesas/71V3579S80PFGI 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}}