{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DSC400-4444Q0059KE1","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"DSC400-4444Q0059KE1","canonicalUrl":"https://icboms.com/microchip/DSC400-4444Q0059KE1","factsUrl":"https://icboms.com/api/mcp/products/DSC400-4444Q0059KE1","rawCanonicalId":null},"summary":{"shortDescription":"Microchip DSC400 series XO (Standard), MEMS-based, four HCSL outputs each configurable to 100MHz or 125MHz, ±50ppm stability, 2.25V–3.6V supply, -20°C to 70°C, 20-VFQFN exposed-pad package.","salesMarkdown":"## Quad HCSL clock source — 100MHz or 125MHz on all four lanes HCSL (High-Speed Current Steering Logic) is the common reference clock format for PCIe Gen1/2/3 interfaces — this oscillator directly drives the REFCLK inputs on a PCIe switch or endpoint without external level translation. ## Supply flexibility and stability for mixed-voltage boards Operates from 2.25V to 3.6V, covering both 2.5V and 3.3V rails — no separate LDO needed when the oscillator shares a rail with the downstream PCIe clock buffer. Frequency stability is ±50ppm over the -20°C to 70°C commercial range, sufficient for PCIe Gen3 reference clock jitter budgets (±300ppm total tolerance). ## MEMS resonator — shock tolerance and supply-chain advantage The MEMS base resonator replaces a quartz crystal — inherently more resistant to vibration and mechanical shock, which matters for equipment deployed in fan-cooled racks or near industrial motors. MEMS oscillators also avoid the long lead times and allocation cycles that quartz crystals sometimes see — the semiconductor fab flow is more predictable. ## 20-VFQFN package — layout and thermal notes Housed in a 20-VFQFN with exposed pad, 5.00mm x 3.20mm body, 0.90mm height — the exposed pad must be soldered to a ground-plane island with thermal vias to keep the junction temperature within the commercial range.","metaTitle":"DSC400-4444Q0059KE1 MEMS XO – 100MHz/125MHz HCSL Quad Output","metaDescription":"Microchip DSC400-4444Q0059KE1 XO (Standard), MEMS resonator, 4x HCSL outputs at 100MHz/125MHz, ±50ppm, -20°C~70°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":"±50ppm","Frequency - Output 1":"100MHz, 125MHz","Frequency - Output 2":"100MHz, 125MHz","Frequency - Output 3":"100MHz, 125MHz","Frequency - Output 4":"100MHz, 125MHz","Operating Temperature":"-20°C~70°C","Current - Supply (Max)":"-"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/b1fa89bbb593bb9f15bbf883a84023ea.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is the DSC400-4444Q0059KE1 RoHS compliant?","answer":"The evidence does not list a RoHS compliance statement for this specific order code. Confirm with the datasheet or request a RoHS certificate of compliance at RFQ time."},{"question":"Can the DSC400-4444Q0059KE1 replace the DSC400-4444Q0059KE1T?","answer":"The 'T' suffix typically indicates tape-and-reel packaging versus tube. The electrical specifications are identical — the only difference is the shipping medium. Confirm with the datasheet that the pinout and marking match."},{"question":"What are the alternative frequencies available in the DSC400 series?","answer":"The DSC400 series offers a wide range of output frequencies, but this specific order code (4444Q0059KE1) is factory-programmed to 100MHz and 125MHz on all four outputs. Other order codes in the series cover different frequency combinations."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/DSC400-4444Q0059KE1","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/DSC400-4444Q0059KE1 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}}