{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY7C144-55JC","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY7C144-55JC","canonicalUrl":"https://icboms.com/infineon/CY7C144-55JC","factsUrl":"https://icboms.com/api/mcp/products/CY7C144-55JC","rawCanonicalId":null},"summary":{"shortDescription":"Infineon Technologies CY7C144 series, 64Kbit dual-port asynchronous SRAM, 55 ns access time, 4.5V–5.5V supply, 8K×8 organization, 68-PLCC J-lead surface-mount package, commercial temperature range.","salesMarkdown":"## 55 ns access time — what it means for shared-memory throughput The CY7C144-55JC is a 64Kbit dual-port asynchronous SRAM organized as 8K×8, with a 55 ns access time from address valid to data valid on either port. That 55 ns window sets the read/write cycle ceiling: the bus master must hold the address stable for the full access time before latching data, so the effective throughput is one read or write every 55 ns minimum — about 18 million accesses per second per port. ## Dual-port architecture — independent port operation without arbitration logic Both ports share the same 8K×8 memory array but each has its own address, data, and control lines. The asynchronous interface means no clock is needed — each port operates at its own pace, with the internal arbitration handling simultaneous writes to the same address via the BUSY flag. This eliminates external arbitration logic in designs where two processors or a processor and an FPGA need a shared mailbox or buffer. ## 68-PLCC package — reflow and socket considerations The 68-lead PLCC with J-leads (24.23×24.23 mm body) is a surface-mount package but the J-lead geometry makes visual inspection of the solder joint difficult — X-ray or a PLCC socket is the practical choice for prototyping or field service. The J-lead coplanarity tolerance is typically 0.10 mm; a stencil aperture that matches the lead footprint and a reflow profile with a 210–220 °C peak (SnPb) or 245–260 °C peak (SAC) are needed to avoid opens. ## Obsolete — sourcing through independent surplus channels Infineon (formerly Cypress) has marked the CY7C144-55JC as obsolete. No pin-compatible drop-in replacement from Infineon exists, so a board spin is required for any alternative part. ## 4.5V–5.5V supply — compatibility with legacy 5V buses The 4.5V–5.5V supply range matches legacy 5V TTL/CMOS logic families. The commercial temperature grade (0°C–70°C) limits deployment to indoor, temperature-controlled equipment — not suitable for automotive, industrial, or outdoor environments without active thermal management.","metaTitle":"CY7C144-55JC Infineon 64Kbit Dual-Port SRAM, 55 ns","metaDescription":"CY7C144-55JC Infineon 64Kbit dual-port asynchronous SRAM, 55 ns access time, 4.5V–5.5V, 68-PLCC. Obsolete — sourced to order against an RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Memory (DRAM / SRAM / Flash / EEPROM)"],"specifications":{"title":"CY7C144-55JC","Technology":"SRAM - Dual Port, Asynchronous","Access Time":"55 ns","Memory Size":"64Kbit","Memory Type":"Volatile","Memory Format":"SRAM","Mounting Type":"Surface Mount","Package / Case":"68-LCC (J-Lead)","lifecycle_stage":"eol_hot","Memory Interface":"Parallel","Voltage - Supply":"4.5V ~ 5.5V","Base Product Number":"CY7C144","Memory Organization":"8K x 8","Operating Temperature":"0°C~70°C(TA)","Supplier Device Package":"68-PLCC (24.23x24.23)","Write Cycle Time - Word, Page":"55ns"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/8dd97de2c060a1d7b25f36619d6625aa.pdf","sourceUrl":null},"ai":{"faq":[{"question":"How can I order the CY7C144-55JC or check availability?","answer":"The CY7C144-55JC is obsolete and sourced through independent surplus channels."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY7C144-55JC","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY7C144-55JC when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T02:09:46.065Z","lastPublished":"2026-07-21T02:09:46.065Z","indexable":true}}