{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"71V3558S166PFG","brand":"Renesas Electronics","brandSlug":"renesas","productSlug":"71V3558S166PFG","canonicalUrl":"https://icboms.com/renesas/71V3558S166PFG","factsUrl":"https://icboms.com/api/mcp/products/71V3558S166PFG","rawCanonicalId":null},"summary":{"shortDescription":"SRAM - Synchronous, SDR (ZBT), 4.5 Mbit, Parallel, 3.5 ns, 166 MHz, 100-LQFP, 3.135V ~ 3.465V, 0°C ~ 70°C.","salesMarkdown":"## 166 MHz clock, 3.5 ns access — the speed-cost tradeoff on a ZBT bus The 71V3558S166PFG is a 4.5 Mbit synchronous SRAM organised as 256K x 18 bits, clocked at 166 MHz with a 3.5 ns access time. The ZBT (Zero Bus Turnaround) architecture eliminates the dead cycle between read and write on the same port — the bus stays active across direction changes, which matters for shared-memory designs where the controller alternates access every cycle. The parallel memory interface uses 18 data lines and 18 address lines (256K depth), so the PCB fan-out on a two-layer board is tight; four-layer is the practical minimum for signal integrity at 166 MHz. ## Active production — no end-of-life signal The product status is Active.","metaTitle":"71V3558S166PFG ZBT SRAM, 4.5 Mbit, 166 MHz, 3.5 ns","metaDescription":"71V3558S166PFG synchronous SRAM, 4.5 Mbit, 166 MHz clock, 3.5 ns access, 3.135-3.465 V, 100-TQFP. Active production. Request a quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Memory (DRAM / SRAM / Flash / EEPROM)"],"specifications":{"Package":"Bulk","Technology":"SRAM - Synchronous, SDR (ZBT)","Access Time":"3.5 ns","Memory Size":"4.5Mbit","Memory Type":"Volatile","Memory Format":"SRAM","Mounting Type":"Surface Mount","Package / Case":"100-LQFP","Clock Frequency":"166 MHz","lifecycle_stage":"eol_hot","Memory Interface":"Parallel","Voltage - Supply":"3.135V ~ 3.465V","Memory Organization":"256K x 18","Operating Temperature":"0°C ~ 70°C (TA)","Supplier Device Package":"100-TQFP (14x14)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$4.26","stockQuantity":16,"priceTiers":[{"qty":71,"price":"$4.26000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/f215e63550592a192ce1bb04318c59ff.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the memory organisation of 71V3558S166PFG?","answer":"The memory is organised as 256K words x 18 bits, giving a total density of 4.5 Mbit. The 18-bit word width (16 data + 2 parity or byte-control bits) is typical for cache-tag or packet-buffer applications."},{"question":"What package does 71V3558S166PFG use?","answer":"The package is surface-mount and RoHS-compliant per the standard lead-free finish."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/renesas/71V3558S166PFG","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/renesas/71V3558S166PFG when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:45:10.375Z","lastPublished":"2026-07-22T19:45:10.375Z","indexable":true}}