{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY7C1543KV18-400BZI","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY7C1543KV18-400BZI","canonicalUrl":"https://icboms.com/infineon/CY7C1543KV18-400BZI","factsUrl":"https://icboms.com/api/mcp/products/CY7C1543KV18-400BZI","rawCanonicalId":null},"summary":{"shortDescription":"Infineon (Cypress) CY7C1543KV18-400BZI, 72Mbit synchronous QDR II+ SRAM, 400 MHz clock, 1.7–1.9V supply, 4M x 18 organization, 165-FBGA (13x15 mm) surface-mount, tray, -40°C to 85°C.","salesMarkdown":"## 400 MHz QDR II+ SRAM for high-throughput buffers The Infineon CY7C1543KV18-400BZI is a 72 Mbit synchronous SRAM built on the QDR II+ architecture, clocked at 400 MHz. Organized as 4M x 18, it uses a parallel interface and operates from a 1.7 V to 1.9 V supply. The industrial temperature range (-40°C to 85°C) suits it for controlled environments like central offices and lab racks, though the 165-FBGA package (13x15 mm) demands careful PCB layout and is not hand-solderable. The CY7C1543KV18-400BZI carries an EOL hot lifecycle stage, meaning Infineon has announced end-of-life for this device.","metaTitle":"Infineon CY7C1543KV18-400BZI 72Mbit QDR II+ SRAM, 400 MHz","metaDescription":"Infineon (Cypress) CY7C1543KV18-400BZI 72Mbit synchronous QDR II+ SRAM, 400 MHz clock, 1.7-1.9V supply, 4M x 18, 165-FBGA, -40°C to 85°C. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Memory (DRAM / SRAM / Flash / EEPROM)"],"specifications":{"title":"CY7C1543KV18-400BZI","Package":"Tray","Technology":"SRAM - Synchronous, QDR II+","Memory Size":"72Mbit","Memory Type":"Volatile","description":"IC SRAM 72MBIT PARALLEL 165FBGA","Memory Format":"SRAM","Mounting Type":"Surface Mount","Package / Case":"165-LBGA","Clock Frequency":"400 MHz","lifecycle_stage":"eol_hot","Memory Interface":"Parallel","Voltage - Supply":"1.7V ~ 1.9V","Base Product Number":"CY7C1543","Memory Organization":"4M x 18","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"165-FBGA (13x15)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$347.3060","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/b39f5a64178bda89935882d8448a00c2.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/CY7C1543KV18-400BZI/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for the CY7C1543KV18-400BZI?","answer":"Submit an RFQ through this listing. We source this part via independent distribution and confirm availability and current pricing at quote time — no stock or price figures are published here because the supply position changes with each inquiry."},{"question":"What is the closest functional alternative to the CY7C1543KV18-400BZI?","answer":"The CY7C1513KV18-250BZI is a 72 Mbit QDR II+ SRAM with the same 4M x 18 organization, but clocked at 250 MHz instead of 400 MHz. It is a lower-speed sibling that could serve as a second source if your design can tolerate the reduced bandwidth. The CY7C1545KV18-450BZXI offers a higher 450 MHz clock but uses a 2M x 36 organization, which changes the data bus width."},{"question":"Will the CY7C1543KV18-400BZI drop into a board designed for the CY7C1513KV18-250BZI?","answer":"Both parts share the same 72 Mbit density, 4M x 18 organization, and 165-FBGA package footprint, so the mechanical fit is identical. However, the 400 MHz clock requires tighter PCB signal integrity — trace length matching and decoupling that worked at 250 MHz may not be adequate at 400 MHz. Verify the board's layout before assuming a direct swap."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY7C1543KV18-400BZI","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY7C1543KV18-400BZI 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}}