{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"71V3556S166PFGI","brand":"Renesas Electronics","brandSlug":"renesas","productSlug":"71V3556S166PFGI","canonicalUrl":"https://icboms.com/renesas/71V3556S166PFGI","factsUrl":"https://icboms.com/api/mcp/products/71V3556S166PFGI","rawCanonicalId":null},"summary":{"shortDescription":"Renesas Electronics 71V3556S166PFGI ZBT SRAM, 4.5 Mbit, 166 MHz, 3.5 ns, 128K x 36, 3.3 V, industrial temp, 100-TQFP.","salesMarkdown":"## 166 MHz ZBT SRAM for high-throughput data paths The 71V3556S166PFGI is a 4.5 Mbit synchronous SRAM using Zero Bus Turnaround (ZBT) architecture, meaning the memory bus never inserts idle cycles between read and write operations — a critical feature for packet buffers and FIFO emulation in networking gear where every clock cycle carries data. Organized as 128K words by 36 bits, the wide data bus maps directly to a 36-bit FPGA or ASIC interface without external muxing. The 166 MHz clock rate delivers a peak bandwidth of 5.97 Gbit/s (166 MHz × 36 bits), which is the actual throughput a designer budgets into the pipeline timing closure. The 100-TQFP (14x14 mm) package has a 0.5 mm pitch that routes cleanly on a 4-layer PCB with standard via fan-out. ## Active lifecycle — no end-of-life pressure for new designs Because the part is active, sourcing is straightforward through authorized distribution channels.","metaTitle":"Renesas 71V3556S166PFGI ZBT SRAM, 166 MHz, 4.5 Mbit","metaDescription":"71V3556S166PFGI from Renesas: 4.5 Mbit synchronous ZBT SRAM, 166 MHz clock, 3.5 ns access, 128K x 36, industrial temp, 100-TQFP.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Discrete Semiconductors"],"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":"128K x 36","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"100-TQFP (14x14)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$5.74","priceTiers":[{"qty":53,"price":"$5.74000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/f215e63550592a192ce1bb04318c59ff.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/71V3556S166PFGI/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/renesas/71V3556S166PFGI","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/renesas/71V3556S166PFGI 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}}