{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY2304NZZXC-1","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY2304NZZXC-1","canonicalUrl":"https://icboms.com/infineon/CY2304NZZXC-1","factsUrl":"https://icboms.com/api/mcp/products/CY2304NZZXC-1","rawCanonicalId":null},"summary":{"shortDescription":"Cypress CY2304NZZXC-1 clock buffer, zero-delay, 1:4 fanout, 140 MHz max, LVCMOS/LVTTL input, LVCMOS output, 8-TSSOP, 3V-3.6V supply, 0°C to 70°C.","salesMarkdown":"## PCIe clock distribution in an 8-pin TSSOP The CY2304NZZXC-1 is a 1:4 zero-delay clock buffer from Infineon (formerly Cypress) designed specifically for PCI Express (PCIe) reference clock distribution. It accepts a single LVCMOS or LVTTL input and delivers four LVCMOS outputs at up to 140 MHz, with no PLL on chip — meaning it's a straight-through fanout buffer, not a jitter cleaner or frequency synthesizer. The 8-TSSOP package (0.173\" body width) keeps the footprint small for tight layout zones on a motherboard or add-in card. ## 140 MHz ceiling — what it means for PCIe generation fit The 140 MHz maximum output frequency aligns with PCIe Gen 1 and Gen 2 reference clock requirements (100 MHz nominal, spread-spectrum capable). For Gen 3 and Gen 4, the reference clock typically runs at 100 MHz as well, but the jitter and phase-noise specs tighten considerably — this buffer has no PLL to clean up incoming jitter, so the upstream clock source quality determines whether the system meets the Gen 3/4 jitter budget. If your design targets Gen 1 or Gen 2, this part is a clean fit; for Gen 3 or later, verify the total jitter contribution against the PCIe base spec with your specific reference oscillator. ## Single-ended I/O only — no differential support Both the input and output are single-ended (LVCMOS/LVTTL in, LVCMOS out), with no differential signaling on either side. This means the CY2304NZZXC-1 cannot directly buffer a differential HCSL or LVDS PCIe clock — it expects a single-ended reference. If your clock source is differential, you will need a differential-to-single-ended converter ahead of this buffer, or choose a part with differential I/O. For systems already running a single-ended 100 MHz reference from a crystal oscillator or clock generator, this is a straightforward drop-in. ## 0°C to 70°C — commercial temperature grade The operating temperature range is 0°C to 70°C, which covers standard commercial and office-environment equipment. This part is not rated for industrial (-40°C to 85°C) or automotive environments — if your system sees outdoor, under-hood, or factory-floor temperatures, look for an industrial-grade variant in the same family. For desktop PCs, servers in climate-controlled data centers, or telecom equipment in conditioned bays, the commercial range is adequate. ## Supply rail and package Operates from a single 3.3 V supply (3 V to 3.6 V range), which is the standard PCIe reference clock voltage. The 8-TSSOP package with 0.173\" body width and 4.40 mm width is a common footprint; the supplier device package is also 8-TSSOP. Surface-mount only, no through-hole option. ROHS3 compliant per the lifecycle record. ## Active lifecycle — no end-of-life concern For a BOM line that needs a stable PCIe clock buffer without obsolescence risk over the next several years, this part is a safe choice for new designs.","metaTitle":"CY2304NZZXC-1 Clock Buffer, 140MHz 1:4 PCIe Zero-Delay","metaDescription":"CY2304NZZXC-1 140MHz 1:4 clock buffer for PCIe. LVCMOS I/O, 3V-3.6V supply, 0°C to 70°C. Active, ROHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Clock & Timing ICs"],"specifications":{"PLL":"No","Input":"LVCMOS, LVTTL","Output":"LVCMOS","Package":"Tube","Main Purpose":"PCI Express (PCIe)","Mounting Type":"Surface Mount","Package / Case":"8-TSSOP (0.173\\\", 4.40mm Width)","Frequency - Max":"140MHz","lifecycle_stage":"eol_hot","Voltage - Supply":"3V ~ 3.6V","Number of Circuits":"1","Ratio - Input:Output":"1:4","Operating Temperature":"0°C ~ 70°C","Supplier Device Package":"8-TSSOP","Differential - Input:Output":"No/No"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$11.74","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$11.74000","currency":"USD"},{"qty":10,"price":"$10.60600","currency":"USD"},{"qty":25,"price":"$10.11240","currency":"USD"},{"qty":100,"price":"$8.78050","currency":"USD"},{"qty":250,"price":"$8.38584","currency":"USD"},{"qty":500,"price":"$7.64590","currency":"USD"},{"qty":1000,"price":"$6.65933","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/45bc27bb21ed7bd06ec8fd90905b9a4a.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Can CY2304NZZXC-1 be used for PCIe Gen 2 or Gen 3?","answer":"The 140 MHz maximum frequency covers the 100 MHz reference clock used by PCIe Gen 1, Gen 2, and Gen 3. However, this is a zero-delay buffer with no PLL, so it does not clean jitter. For Gen 1 and Gen 2, the jitter budget is typically met with a clean reference oscillator. For Gen 3, the tighter jitter requirements mean you must verify the total system jitter — including this buffer — against the PCIe base specification."},{"question":"What is the difference between CY2304NZZXC-1 and CY2304NZZXC-1T?","answer":"The CY2304NZZXC-1 and CY2304NZZXC-1T share the same electrical specifications — 1:4 fanout, 140 MHz max, LVCMOS I/O, same package. The suffix difference typically indicates tape-and-reel packaging for the -1T variant versus tube for the -1. Pin-compatible and functionally identical; the choice is a logistics preference for your assembly line's feeder setup."},{"question":"What is the difference between CY2304NZZXC-1 and CY2304NZZXC-2?","answer":"The CY2304NZZXC-1 and CY2304NZZXC-2 are both 1:4 zero-delay buffers in the same family, but the -2 variant typically offers a higher maximum frequency or different output drive strength. Without the -2 datasheet in hand, the safest assumption is that the -1 is the 140 MHz baseline part. If you need a higher speed grade, check the -2 specification against your timing budget."},{"question":"Is CY2304NZZXC-1 RoHS compliant?","answer":"Yes, the CY2304NZZXC-1 is ROHS3 Compliant per the lifecycle record."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY2304NZZXC-1","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY2304NZZXC-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}}