{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY7B9940V-2AC","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY7B9940V-2AC","canonicalUrl":"https://icboms.com/infineon/CY7B9940V-2AC","factsUrl":"https://icboms.com/api/mcp/products/CY7B9940V-2AC","rawCanonicalId":null},"summary":{"shortDescription":"Cypress RoboClockII™ Junior, PLL-based clock buffer/zero-delay buffer, 200 MHz max frequency, 4:10 input:output ratio, LVPECL/LVTTL input, LVTTL output, 2.97 V to 3.63 V supply, 44-TQFP, 0°C to 70°C.","salesMarkdown":"## PLL-based clock distribution for 200 MHz trees The Cypress CY7B9940V-2AC is a PLL-based clock buffer from the RoboClockII Junior family. It accepts LVPECL or LVTTL inputs and delivers LVTTL outputs across a 4:10 input-to-output ratio, with a maximum operating frequency of 200 MHz. ## 4:10 fanout — what it means for the clock tree The 4:10 ratio means this buffer can accept up to four independent clock inputs and distribute them to ten outputs. In practice, that lets a designer fan out a single master clock to multiple destination ICs (FPGAs, PHYs, ASICs) while keeping skew low across the bank. The differential input (LVPECL) option is useful when the reference clock arrives over a twisted pair or a long board trace; the single-ended LVTTL input works for local on-board oscillators. All ten outputs are LVTTL, so the downstream logic must accept that logic level — no CML or HCSL on the output side. ## Supply and temperature — deployment context The supply range is 2.97 V to 3.63 V. The operating temperature range is 0°C to 70°C. ## Lifecycle and sourcing reality Note that this part is marked RoHS non-compliant, so it is not suitable for new designs requiring RoHS exemption-free assembly. For RoHS-compliant builds, a lead-free variant or a different buffer should be selected.","metaTitle":"CY7B9940V-2AC RoboClockII Junior PLL Clock Buffer, 200 MHz","metaDescription":"Cypress RoboClockII Junior PLL-based zero-delay clock buffer. 200 MHz max, 4:10 fanout, LVPECL/LVTTL in, LVTTL out. 44-TQFP, 0-70°C.","metaKeywords":null},"attributes":{"series":"RoboClockII™ Junior","packageCase":null,"mountingType":null,"rohsStatus":"RoHS non-compliant","productStatus":"Active","categoryPath":["Clock & Timing ICs"],"specifications":{"PLL":"Yes","Type":"Clock Buffer, Zero Delay Buffer","Input":"LVPECL, LVTTL","Output":"LVTTL","Series":"RoboClockII™ Junior","Package":"Bulk","Mounting Type":"Surface Mount","Package / Case":"44-LQFP","Frequency - Max":"200MHz","lifecycle_stage":"eol_hot","Voltage - Supply":"2.97V ~ 3.63V","Divider/Multiplier":"Yes/No","Number of Circuits":"1","Ratio - Input:Output":"4:10","Operating Temperature":"0°C ~ 70°C (TA)","Supplier Device Package":"44-TQFP (10x10)","Differential - Input:Output":"Yes/No"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$15.81","stockQuantity":0,"priceTiers":[{"qty":19,"price":"$15.81000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/9838fc76849e4981fdfd814a077ea74d.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the equivalent or replacement for CY7B9940V-2AC?","answer":"A functional peer is the CY2305SXI-1HT, also a zero-delay buffer, but with a 1:5 fanout ratio (vs 4:10), no differential input, and a maximum frequency of 133.33 MHz. The CY7B9940V-2AC offers higher fanout and differential input capability, so the CY2305 is not a direct pin-compatible substitute — it fits simpler, lower-speed clock trees."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY7B9940V-2AC","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY7B9940V-2AC 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}}