{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY28349OC","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY28349OC","canonicalUrl":"https://icboms.com/infineon/CY28349OC","factsUrl":"https://icboms.com/api/mcp/products/CY28349OC","rawCanonicalId":null},"summary":{"shortDescription":"Cypress CY28349OC, PLL Clock Synthesizer and Driver, LVTTL/Crystal Input, 1:20 Fanout, 3.135V-3.465V Supply, 0°C to 70°C, 48-BSSOP.","salesMarkdown":"## Chipset-specific clock tree in a single package The Cypress CY28349OC is a PLL-based clock synthesizer and driver designed specifically for Intel 830M and 845 chipset platforms. It accepts a single LVTTL or crystal input and distributes up to 20 clock outputs, covering the full clock tree for those chipset generations — CPU, PCI, AGP, and SDRAM reference frequencies — without external fanout buffers. The 1:20 fanout ratio means one input drives twenty outputs, which simplifies board layout and reduces component count in multi-load clock distribution. Operating from a 3.135 V to 3.465 V supply and rated for 0°C to 70°C, this part fits indoor, commercial-temperature equipment. ## Lifecycle and compliance — active but not RoHS The CY28349OC is listed as Active in production status. It is marked RoHS non-compliant. ## What the 1:20 ratio and 1 MHz max frequency mean for your design The 1:20 input-to-output ratio eliminates the need for multiple clock buffers when distributing a reference to many loads. The maximum frequency is 1 MHz. The single PLL circuit handles the multiplication and skew management for all outputs. There is no divider on the output path (Divider/Multiplier: Yes/No). ## Package and footprint — 48-BSSOP (7.50 mm width) The part comes in a 48-lead BSSOP package with a 7.50 mm body width (0.295 inch). The supplier device package is 48-SSOP.","metaTitle":"CY28349OC Clock Synthesizer, PLL, 1:20 Fanout, 48-SSOP","metaDescription":"CY28349OC PLL clock synthesizer and driver for Intel 830M/845 chipsets. 1:20 fanout, LVTTL/crystal input, 3.3V supply, 48-SSOP.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"RoHS non-compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"PLL":"Yes","Type":"Clock Synthesizer, Driver","Input":"LVTTL, Crystal","Output":"Clock","Package":"Bulk","Mounting Type":"Surface Mount","Package / Case":"48-BSSOP (0.295\\\", 7.50mm Width)","Frequency - Max":"1MHz","lifecycle_stage":"eol_hot","Voltage - Supply":"3.135V ~ 3.465V","Divider/Multiplier":"Yes/No","Number of Circuits":"1","Ratio - Input:Output":"1:20","Operating Temperature":"0°C ~ 70°C (TA)","Supplier Device Package":"48-SSOP","Differential - Input:Output":"No/No"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.13","stockQuantity":0,"priceTiers":[{"qty":141,"price":"$2.13000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/554e9c5fd0ad11921a7b07707a62775d.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is CY28349OC compatible with Intel 830M and 845 chipsets?","answer":"Yes, the CY28349OC is explicitly designed as a frequency timing generator for Intel 830M and 845 chipsets. It generates the required clock frequencies for those platform memory controller hubs."},{"question":"Does CY28349OC support differential output?","answer":"No, both the input and output are single-ended (Differential - Input:Output is No/No). All 20 outputs are standard LVTTL-level clock signals."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY28349OC","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY28349OC 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}}