{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY28349BOC","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY28349BOC","canonicalUrl":"https://icboms.com/infineon/CY28349BOC","factsUrl":"https://icboms.com/api/mcp/products/CY28349BOC","rawCanonicalId":null},"summary":{"shortDescription":"Cypress CY28349BOC, Clock Synthesizer / Driver, PLL Yes, Input LVTTL/Crystal, Output Clock, 1:20 Ratio, 1 Circuit, 48-BSSOP, 0°C–70°C, 3.135V–3.465V Supply.","salesMarkdown":"## PLL clock synthesizer with a 1:20 fanout — what it means for the board The CY28349BOC is a Cypress clock synthesizer and driver built around an integrated PLL. It accepts a single LVTTL or crystal input and distributes up to twenty clock outputs, making it a central clock-tree device for a motherboard, baseband card, or networking line card that needs to fan a clean reference to multiple PLLs, ASICs, or FPGAs. The 1:20 ratio means one reference oscillator feeds twenty loads — a significant fanout that saves multiple buffer stages but also places a premium on the PLL's jitter performance and the board's decoupling scheme. The supply is tightly specified at 3.135 V to 3.465 V, so the 3.3 V rail needs to stay inside ±5 % under transient load. Operating temperature is limited to 0 °C to 70 °C — a commercial-grade part intended for indoor, temperature-controlled equipment such as servers, telecom racks, and test gear. Not rated for the -40 °C to 85 °C industrial range that a motor drive or outdoor radio would require. ## Package and footprint — 48-BSSOP considerations Housed in a 48-lead SSOP (7.50 mm body width), surface-mount only. The 0.635 mm pitch is fine enough that a standard wave-solder profile may bridge adjacent pins — reflow is the recommended assembly method. No exposed thermal pad, so the package relies on the leadframe and PCB copper for heat dissipation; keep the surrounding ground plane continuous under the part. ## Active production, but RoHS non-compliant That said, it is marked RoHS non-compliant, meaning it contains lead (Pb) in the solder finish or die-attach. This is a hard stop for any design that must meet EU RoHS or similar directives. For legacy assemblies that are RoHS-exempt or already use tin-lead solder, it is a valid, fully qualified drop-in.","metaTitle":"CY28349BOC Clock Synthesizer, PLL, 1:20 Fanout, 48-SSOP","metaDescription":"Cypress CY28349BOC clock synthesizer with PLL, 1:20 input-to-output ratio, 3.135V–3.465V supply, 0°C–70°C. Active, RoHS non-compliant.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"RoHS non-compliant","productStatus":"Active","categoryPath":["Clock & Timing ICs"],"specifications":{"PLL":"Yes","Type":"Clock Synthesizer, Driver","Input":"LVTTL, Crystal","Output":"Clock","Package":"Bulk","Mounting Type":"Surface Mount","Package / Case":"48-BSSOP (0.295\\\", 7.50mm Width)","Frequency - Max":"1MHz","lifecycle_stage":"eol_hot","Voltage - Supply":"3.135V ~ 3.465V","Divider/Multiplier":"Yes/No","Number of Circuits":"1","Ratio - Input:Output":"1:20","Operating Temperature":"0°C ~ 70°C (TA)","Supplier Device Package":"48-SSOP","Differential - Input:Output":"No/No"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.57","stockQuantity":0,"priceTiers":[{"qty":117,"price":"$2.57000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/4b8f63be182bb78a59077674564c8482.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is CY28349BOC RoHS compliant?","answer":"No, it is listed as RoHS non-compliant. The part contains lead and is intended for legacy or RoHS-exempt assemblies."},{"question":"What is the maximum frequency of CY28349BOC?","answer":"The maximum output frequency is 1 MHz. This is a low-frequency clock synthesizer, not suited for high-speed serial or memory interfaces that need tens or hundreds of megahertz."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY28349BOC","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY28349BOC 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}}