{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY2305ESXI-1","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY2305ESXI-1","canonicalUrl":"https://icboms.com/infineon/CY2305ESXI-1","factsUrl":"https://icboms.com/api/mcp/products/CY2305ESXI-1","rawCanonicalId":null},"summary":{"shortDescription":"Cypress CY2305ESXI-1, PLL-based Zero Delay Buffer, 1:9 fanout, 133.33MHz max, 3V-3.6V supply, -40°C to 85°C, 8-SOIC.","salesMarkdown":"## What this PLL clock driver does on your board The Cypress CY2305ESXI-1 is a PLL-based zero delay buffer that takes a single clock input and distributes it to nine outputs with near-zero propagation delay between input and output. It integrates a phase-locked loop that aligns the output edges to the input, so the clock tree adds negligible skew — useful when multiple ICs on the same board need a synchronous clock without daisy-chaining through separate buffers. The PLL can be bypassed, which lets you run the device as a simple fanout buffer when the zero-delay alignment isn't needed or when the PLL's jitter would be a problem for a sensitive analog section. ## 133.33 MHz and 1:9 fanout — sizing the clock tree The maximum output frequency of 133.33 MHz covers most common bus clocks — PCI, Ethernet MAC/PHY reference, DDR memory controller interfaces, and general-purpose processor clocks. The 1:9 input-to-output ratio means a single CY2305ESXI-1 can feed nine loads, which often covers an entire board's clock distribution in a single device. If you need more than nine outputs, you cascade two devices or use a separate fanout buffer after this one; the zero-delay alignment holds as long as the feedback path is correctly routed. ## Supply rail and temperature grade — where it fits Rated for 3V to 3.6V supply, this part is designed for a nominal 3.3V rail. The 3V floor means it can run from a 3.0V LDO or a battery-backed rail that droops under load, which is relevant for telecom line cards or industrial controllers with a backup supply. The industrial temperature range of -40°C to 85°C qualifies it for outdoor base stations, factory-floor PLCs, and engine-bay-adjacent electronics where the ambient can swing well beyond commercial limits. ## Package and mounting — board-fit details Housed in an 8-SOIC package with 3.90 mm body width, surface-mount. The 8-pin SOIC is a standard footprint that routes easily on two-layer boards. No exposed thermal pad — the 133.33 MHz switching draws modest current, so the SOIC's junction-to-ambient thermal path is adequate for typical loads. Store the reels dry;. ## Lifecycle and compliance — no obsolescence worry Listed as Active with no NRND or last-time-buy notice. RoHS3 compliant, so it meets the latest EU restriction directive for lead-free assembly.","metaTitle":"Cypress CY2305ESXI-1 Zero Delay Buffer, 133.33MHz, 8-SOIC","metaDescription":"Cypress CY2305ESXI-1 PLL-based zero delay buffer, 1:9 fanout, 133.33MHz max, 3V-3.6V supply, -40°C to 85°C, 8-SOIC. Active, RoHS3 compliant.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Clock & Timing ICs"],"specifications":{"PLL":"Yes with Bypass","Type":"Zero Delay Buffer","Input":"Clock","Output":"Clock","Package":"Bulk","Mounting Type":"Surface Mount","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","Frequency - Max":"133.33MHz","lifecycle_stage":"eol_hot","Voltage - Supply":"3V ~ 3.6V","Divider/Multiplier":"No/No","Number of Circuits":"1","Ratio - Input:Output":"1:9","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"8-SOIC","Differential - Input:Output":"No/No"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.66","stockQuantity":0,"priceTiers":[{"qty":113,"price":"$2.66000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/5f5b65a7313071c9721748a9cffac01d.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is CY2305ESXI-1 a direct replacement for CY2305SXI-1HT?","answer":"The CY2305SXI-1HT is a close functional sibling — same Cypress PLL-based zero delay buffer family, same 133.33 MHz maximum frequency, same 3.0V to 3.6V supply range, and same industrial temperature grade. The key difference is the fanout ratio: CY2305ESXI-1 provides 1:9 outputs, while CY2305SXI-1HT provides 1:5 outputs. The package is the same 8-SOIC footprint, so the CY2305SXI-1HT can serve as a drop-in replacement if your design only needs five clock outputs instead of nine. Verify the output count against your clock tree before substituting."},{"question":"Is CY2305ESXI-1 RoHS compliant?","answer":"Yes, CY2305ESXI-1 is RoHS3 compliant, meeting the latest EU restriction directive for lead-free and restricted-substance compliance in electronic assemblies."},{"question":"Is CY2305ESXI-1 compatible with a 2.5V supply?","answer":"No. The supply voltage range is specified as 3V to 3.6V. Operating below 3V is outside the rated range and may cause the PLL to lose lock or the outputs to fail to meet timing specifications. For a 2.5V clock distribution application, look for a zero delay buffer or fanout buffer explicitly rated for 2.5V operation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY2305ESXI-1","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY2305ESXI-1 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}}