{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"71321SA55JG8","brand":"Renesas Electronics","brandSlug":"renesas","productSlug":"71321SA55JG8","canonicalUrl":"https://icboms.com/renesas/71321SA55JG8","factsUrl":"https://icboms.com/api/mcp/products/71321SA55JG8","rawCanonicalId":null},"summary":{"shortDescription":"Renesas 71321SA55JG8, 16Kbit (2K x 8) Dual-Port Asynchronous SRAM, 55 ns access time, Parallel interface, 4.5V–5.5V supply, 0°C–70°C, 52-PLCC (19.13x19.13 mm), Surface Mount, Tape & Reel.","salesMarkdown":"## Dual-port asynchronous SRAM in a 52-PLCC — what you get The Renesas 71321SA55JG8 is a 16Kbit (2K x 8) dual-port asynchronous SRAM. Unlike a single-port memory, the dual-port architecture gives two independent controllers simultaneous read/write access to the same memory array through separate address, data, and control buses. The 55 ns access time and 55 ns write cycle time are matched, so the bus timing is symmetric. At 5V nominal (4.5V–5.5V supply,) this part sits comfortably in legacy 5V systems — think industrial PLCs, telecom line cards, or older test equipment that still run on 5V logic and haven't migrated to 3.3V or 1.8V domains. The 52-PLCC package with J-leads is a surface-mount footprint that is noticeably larger than modern fine-pitch packages (19.13 mm square,), but it is straightforward to hand-solder and inspect under a microscope. That makes it a practical choice for low-volume production runs, prototype boards, or field-service rework where a BGA or QFN would be impractical. ## 55 ns access — timing margin on a 5V bus At 55 ns, the access time is the slowest rating on this part and the one that decides whether it can interface with your controller without wait states. A 5V microcontroller running at 20 MHz has a 50 ns clock period — this SRAM's 55 ns access means the controller will need at least one wait state for a read cycle. For a 10 MHz bus (100 ns period), the 55 ns access fits with 45 ns of margin, so zero-wait-state operation is possible. Check your controller's memory-cycle timing against the 55 ns access and 55 ns write cycle before committing the BOM line. For a BOM that needs multi-year supply assurance, this part does not carry the obsolescence flag that some older dual-port SRAMs do. It is also RoHS3 compliant, which keeps it usable in new designs bound for EU or RoHS-regulated markets without an exemption.","metaTitle":"71321SA55JG8 16Kbit Dual-Port SRAM, 55 ns, 52-PLCC","metaDescription":"71321SA55JG8 is a 16Kbit (2K x 8) dual-port asynchronous SRAM with 55 ns access time, 4.5V–5.5V supply, 0°C–70°C, in a 52-PLCC. Active, RoHS3 compliant.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Memory (DRAM / SRAM / Flash / EEPROM)"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","Technology":"SRAM - Dual Port, Asynchronous","Access Time":"55 ns","Memory Size":"16Kbit","Memory Type":"Volatile","Memory Format":"SRAM","Mounting Type":"Surface Mount","Package / Case":"52-LCC (J-Lead)","lifecycle_stage":"eol_hot","Memory Interface":"Parallel","Voltage - Supply":"4.5V ~ 5.5V","Memory Organization":"2K x 8","Operating Temperature":"0°C ~ 70°C (TA)","Supplier Device Package":"52-PLCC (19.13x19.13)","Write Cycle Time - Word, Page":"55ns"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$10.30208","priceTiers":[{"qty":400,"price":"$10.30208","currency":"USD"},{"qty":800,"price":"$9.95968","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/079c4ce326e82aa3134fb03e4207d629.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/71321SA55JG8/alternatives.json"},"ai":{"faq":[{"question":"What is the closest alternative — 71321LA20PFG?","answer":"The 71321LA20PFG is a faster sibling in the same 16Kbit dual-port SRAM family, with a 20 ns access time versus the 71321SA55JG8's 55 ns. The trade-off is speed versus cost — the 20 ns part commands a premium and is typically supplied in tray packaging rather than tape and reel. If your bus timing requires zero wait states at a higher clock rate, the LA20PFG is the right cross-shop candidate; if 55 ns is sufficient, the SA55JG8 is the lower-cost choice."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/renesas/71321SA55JG8","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/renesas/71321SA55JG8 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}}