{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY28347ZC","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY28347ZC","canonicalUrl":"https://icboms.com/infineon/CY28347ZC","factsUrl":"https://icboms.com/api/mcp/products/CY28347ZC","rawCanonicalId":null},"summary":{"shortDescription":"Cypress CY28347ZC, processor-specific clock generator, PLL Yes, Input Clock, Output Clock, Main Purpose DDR, 200 MHz max, 1:18 ratio, differential I/O, 56-TSSOP, 0°C to 70°C, Surface Mount.","salesMarkdown":"## DDR clock generator with 200 MHz PLL and 1:18 fanout The Cypress CY28347ZC is a processor-specific PLL clock generator designed for DDR memory subsystems. It accepts a single clock input and distributes up to 18 clock outputs at frequencies up to 200 MHz, with differential signaling on both input and output sides — the signal type DDR controllers and DIMMs expect for clean edge rates at that speed. The 1:18 fanout means one part can clock an entire multi-rank DDR memory array or a multi-core processor cluster, reducing the number of clock buffers on the board. The single-circuit PLL locks to the reference and delivers low-jitter copies across the 18 outputs. Operating temperature is rated 0°C to 70°C, which covers commercial equipment — servers, workstations, networking gear, and office electronics. Not rated for industrial or automotive under-hood environments. ## Differential I/O — what it means for signal integrity Both input and output are differential (Yes/Yes). That tells you the part expects a differential reference clock — typically from an oscillator or another PLL — and delivers differential pairs to each DDR DRAM or controller. At 200 MHz, differential routing keeps common-mode noise out of the clock tree and maintains the tight skew budget DDR requires. ## Lifecycle and supply posture That removes the urgency for a last-time-buy or a hasty redesign — the part can be specified into new BOMs with confidence. RoHS non-compliant per the listing — factor that into any EU or RoHS-mandated BOM review.","metaTitle":"CY28347ZC DDR Clock Generator, PLL, 200 MHz, 1:18 Fanout","metaDescription":"CY28347ZC processor-specific clock generator for DDR memory. PLL-based, 200 MHz max, 1:18 differential I/O. 56-TSSOP, active.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"RoHS non-compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"PLL":"Yes","Input":"Clock","Output":"Clock","Package":"Bulk","Main Purpose":"DDR","Mounting Type":"Surface Mount","Package / Case":"56-TFSOP (0.240\\\", 6.10mm Width)","Frequency - Max":"200MHz","lifecycle_stage":"eol_hot","Voltage - Supply":"2.375V ~ 2.625V, 3.135V ~ 3.465V","Number of Circuits":"1","Ratio - Input:Output":"1:18","Operating Temperature":"0°C ~ 70°C (TA)","Supplier Device Package":"56-TSSOP II","Differential - Input:Output":"Yes/Yes"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.13","stockQuantity":0,"priceTiers":[{"qty":96,"price":"$3.13000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/e52d3ff8cde6be94a996c11a58e5f64f.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the maximum frequency of CY28347ZC?","answer":"The maximum output frequency is 200 MHz, which covers DDR1 and DDR2 clock rates and many DDR3 base clocks."},{"question":"Does CY28347ZC have differential outputs?","answer":"Yes — both the input and output are differential (Yes/Yes), supporting the differential clocking standard for DDR memory interfaces."},{"question":"What is the function of CY28347ZC?","answer":"It is a processor-specific PLL clock generator for DDR memory. It takes one clock input and produces 18 clock outputs at up to 200 MHz, all differential."},{"question":"What is the replacement or equivalent for CY28347ZC?","answer":"No direct replacement or second-source alternate is listed in the available records. The part is active, so no substitution is required for production continuity."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY28347ZC","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY28347ZC when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}