{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DSC400-4444Q0059KI2","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"DSC400-4444Q0059KI2","canonicalUrl":"https://icboms.com/microchip/DSC400-4444Q0059KI2","factsUrl":"https://icboms.com/api/mcp/products/DSC400-4444Q0059KI2","rawCanonicalId":null},"summary":{"shortDescription":"Microchip DSC400-4444Q0059KI2, XO (Standard) MEMS oscillator, quad HCSL outputs at 100 MHz and 125 MHz, ±25 ppm stability, 2.25V–3.6V supply, -40°C to 85°C, 20-VFQFN exposed pad package.","salesMarkdown":"## Quad HCSL clock source for PCIe and Ethernet reference HCSL is the standard output type for PCIe reference clocks, and the 100/125 MHz frequencies cover PCIe Gen1-3 and 1GbE/10GbE reference requirements from a single device. Operating from 2.25V to 3.6V, the oscillator can run on a 2.5V or 3.3V rail without an external LDO, simplifying the power tree. ## Package footprint and thermal pad planning The 20-VFQFN Exposed Pad package measures 5.00mm x 3.20mm with a 0.90mm height. The 0.50mm pitch QFN footprint requires a solder-paste stencil aperture that matches the pad size to avoid bridging.","metaTitle":"DSC400-4444Q0059KI2 XO HCSL 100/125 MHz Quad Output","metaDescription":"Microchip DSC400-4444Q0059KI2 XO (Standard) with HCSL output, quad 100/125 MHz, ±25 ppm stability, -40°C to 85°C, 20-VFQFN. Active production. Request quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Crystals & Oscillators"],"specifications":{"Mfr":"Microchip Technology","Type":"XO (Standard)","Height":"0.035\\\" (0.90mm)","Output":"HCSL","Series":"DSC400","Package":"Tube","Function":"Enable/Disable","Base Resonator":"MEMS","Package / Case":"20-VFQFN Exposed Pad","Product Status":"Active","lifecycle_stage":"eol_hot","Size / Dimension":"0.197\\\" L x 0.126\\\" W (5.00mm x 3.20mm)","Voltage - Supply":"2.25V ~ 3.6V","Base Product Number":"DSC400","Frequency Stability":"±25ppm","Frequency - Output 1":"100MHz, 125MHz","Frequency - Output 2":"100MHz, 125MHz","Frequency - Output 3":"100MHz, 125MHz","Frequency - Output 4":"100MHz, 125MHz","Operating Temperature":"-40°C~85°C","Current - Supply (Max)":"-"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/b1fa89bbb593bb9f15bbf883a84023ea.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/DSC400-4444Q0059KI2/alternatives.json"},"ai":{"faq":[{"question":"What is the output type of the DSC400-4444Q0059KI2?","answer":"The output type is HCSL (High-Speed Current Steering Logic), which is the standard for PCIe reference clocks. It is not a CMOS or LVDS output."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/DSC400-4444Q0059KI2","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/DSC400-4444Q0059KI2 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}