{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY7B991-5JIT","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY7B991-5JIT","canonicalUrl":"https://icboms.com/infineon/CY7B991-5JIT","factsUrl":"https://icboms.com/api/mcp/products/CY7B991-5JIT","rawCanonicalId":null},"summary":{"shortDescription":"Cypress RoboClock™ CY7B991-5JIT, PLL-based fanout buffer / zero delay buffer, 80 MHz max, 1:8 CMOS fanout, 4.5-5.5V supply, -40 to 85°C, 32-PLCC (J-Lead), surface mount.","salesMarkdown":"## What this part does — and what it doesn't The Cypress CY7B991-5JIT is a PLL-based clock fanout buffer from the RoboClock family. It takes one CMOS input and distributes it to eight CMOS outputs with zero-delay alignment. Supply range is 4.5 V to 5.5 V. Operating temperature span is -40°C to 85°C. No differential I/O. ## Package and mounting — the PLCC footprint Housed in a 32-lead PLCC with J-leads, body dimensions 11.43 x 13.97 mm. Surface-mount. ## Lifecycle and compliance Status is Active per the manufacturer. The part is RoHS non-compliant.","metaTitle":"CY7B991-5JIT RoboClock PLL Fanout Buffer, 80 MHz, 1:8","metaDescription":"Cypress RoboClock CY7B991-5JIT PLL-based zero-delay buffer, 80 MHz max, 1:8 fanout, 4.5-5.5V, -40 to 85°C, 32-PLCC. Active, RoHS non-compliant.","metaKeywords":null},"attributes":{"series":"RoboClock™","packageCase":null,"mountingType":null,"rohsStatus":"RoHS non-compliant","productStatus":"Active","categoryPath":["Clock & Timing ICs"],"specifications":{"PLL":"Yes","Type":"Fanout Buffer (Distribution), Zero Delay Buffer","Input":"CMOS","Output":"CMOS","Series":"RoboClock™","Package":"Bulk","Mounting Type":"Surface Mount","Package / Case":"32-LCC (J-Lead)","Frequency - Max":"80MHz","lifecycle_stage":"eol_hot","Voltage - Supply":"4.5V ~ 5.5V","Divider/Multiplier":"Yes/No","Number of Circuits":"1","Ratio - Input:Output":"1:8","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"32-PLCC (11.43x13.97)","Differential - Input:Output":"No/No"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$14.42","stockQuantity":0,"priceTiers":[{"qty":21,"price":"$14.42000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/e8f8d1261c7c90037c5def5f98d37105.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is CY7B991-5JIT obsolete or still active?","answer":"The manufacturer lists the CY7B991-5JIT as Active. No end-of-life notice or last-time-buy window is in effect. It can be specified into new designs without obsolescence risk."},{"question":"Does CY7B991-5JIT work with 3.3V input?","answer":"No. The supply voltage range is 4.5 V to 5.5 V, and the input is CMOS-level referenced to that supply. A 3.3 V logic signal will not reliably drive the input. Use level translation or select a 3.3 V-rated clock buffer."},{"question":"What is a direct replacement for CY7B991-5JIT?","answer":"The Cypress CY2305SXI-1HT is a similar PLL-based fanout buffer but runs on 3.3 V and has a 1:5 fanout ratio, not 1:8. It is not a pin-for-pin replacement — the PLCC footprint and 5 V supply differ. For a functional equivalent at 5 V with 1:8 fanout, the best path is to source the original CY7B991-5JIT or check the RoboClock family for a 5 V variant with the same PLCC pinout."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY7B991-5JIT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY7B991-5JIT 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}}