{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY22381FXI","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY22381FXI","canonicalUrl":"https://icboms.com/infineon/CY22381FXI","factsUrl":"https://icboms.com/api/mcp/products/CY22381FXI","rawCanonicalId":null},"summary":{"shortDescription":"Infineon CY22381FXI, Clock Generator with Fanout Distribution, PLL Yes with Bypass, 166 MHz max, 1:3 LVTTL/Crystal-in to CMOS-out, 3.135V–3.465V supply, -40°C to 85°C, 8-SOIC.","salesMarkdown":"## What this clock generator does and who specifies it The CY22381FXI is a single-circuit PLL clock generator with fanout distribution — it takes a low-frequency LVTTL or crystal input and synthesizes up to three CMOS outputs at frequencies up to 166 MHz. The PLL includes a bypass mode, which lets you feed the input straight through for test or low-jitter paths without reconfiguring the board. Design engineers reach for this part when they need a clean, programmable clock from a simple crystal on a 3.3V rail and want to distribute it to three loads without adding a separate fanout buffer. The industrial temperature range means it can live in a motor drive or outdoor telecom enclosure without a commercial-grade workaround. The 166 MHz ceiling covers most MCU, FPGA, and Ethernet PHY reference clocks. The 1:3 input-to-output ratio means one crystal feeds three clock loads. Supply voltage tolerance is 3.135V to 3.465V — a 3.3V rail with ±5% regulation. If your board's 3.3V bus droops below 3.135V under load, the PLL may lose lock and the output frequency drifts. Budget a regulator with tight line/load regulation for this rail. The PLL bypass mode is useful during board bring-up: you can feed a known-good reference clock directly to the outputs and isolate the PLL as a variable. No differential I/O — all signals are single-ended CMOS, which keeps the layout simple but limits noise immunity on long traces. ## Package and board-fit note The 8-SOIC package (0.154-inch width, 3.90 mm body) is a standard footprint — no fine-pitch alignment, no hidden thermal pad. Rework is straightforward with a hot-air pencil; no moisture-bake required for typical floor life.","metaTitle":"CY22381FXI Clock Generator","metaDescription":"CY22381FXI from Infineon: PLL clock generator with fanout distribution, 166 MHz max output, 1:3 ratio, industrial temp -40°C to 85°C, 8-SOIC package.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Clock & Timing ICs"],"specifications":{"PLL":"Yes with Bypass","Type":"Clock Generator, Fanout Distribution","Input":"LVTTL, Crystal","Output":"CMOS","Package":"Tube","Mounting Type":"Surface Mount","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","Frequency - Max":"166MHz","lifecycle_stage":"eol_hot","Voltage - Supply":"3.135V ~ 3.465V","Divider/Multiplier":"Yes/No","Number of Circuits":"1","Ratio - Input:Output":"1:3","Operating Temperature":"-40°C ~ 85°C","Supplier Device Package":"8-SOIC","Differential - Input:Output":"No/No"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$15.05","stockQuantity":0,"priceTiers":[{"qty":100,"price":"$9.09000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/70d3575e84ea1c4d484f245a001243c2.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the maximum output frequency of CY22381FXI?","answer":"The maximum output frequency is 166 MHz. That is the ceiling for the synthesized CMOS outputs."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY22381FXI","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY22381FXI 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}}