{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DSC400-4444Q0031KE1T","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"DSC400-4444Q0031KE1T","canonicalUrl":"https://icboms.com/microchip/DSC400-4444Q0031KE1T","factsUrl":"https://icboms.com/api/mcp/products/DSC400-4444Q0031KE1T","rawCanonicalId":null},"summary":{"shortDescription":"Microchip DSC400 series MEMS XO, 20-VFQFN, quad 156.25 MHz HCSL outputs, ±50 ppm stability, 2.25-3.6 V supply, -20 to 70 °C","salesMarkdown":"## Quad 156.25 MHz HCSL clock generator The DSC400-4444Q0031KE1T is a MEMS-based XO (standard) from Microchip's DSC400 series, delivering four identical 156.25 MHz outputs in HCSL logic levels — a direct fit for PCIe Gen3 reference clock trees that require four copies of the same frequency. Housed in a 20-VFQFN exposed-pad package measuring 5.00 mm x 3.20 mm with a 0.90 mm profile, it suits dense line cards and switch designs where board height is constrained. ## Supply range and enable control Wide supply range of 2.25 V to 3.6 V covers common 2.5 V and 3.3 V rails without an external regulator, simplifying power distribution on multi-voltage boards.","metaTitle":"DSC400-4444Q0031KE1T Microchip MEMS XO, Quad 156.25MHz HCSL","metaDescription":"Active Microchip DSC400 MEMS XO, quad 156.25MHz HCSL outputs, ±50ppm stability, -20°C~70°C, 20-VFQFN. Sourced per RFQ.","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":"Tape & Reel (TR)","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":"156.25MHz","Frequency - Output 2":"156.25MHz","Frequency - Output 3":"156.25MHz","Frequency - Output 4":"156.25MHz","Operating Temperature":"-20°C~70°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/DSC400-4444Q0031KE1T/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy DSC400-4444Q0031KE1T and what is the lead time?","answer":"This active Microchip part is available through independent distribution. We source it per your RFQ — lead time and lot-specific pricing are confirmed at quote time, not on a static page. No stock-holding claim; we quote against your BOM quantity."},{"question":"What output frequency does DSC400-4444Q0031KE1T provide?","answer":"All four outputs are 156.25 MHz HCSL — a standard PCIe Gen3 reference clock frequency. The ±50 ppm stability covers the ±300 ppm total tolerance required by the PCIe Base Spec, with margin for temperature drift."},{"question":"Is DSC400-4444Q0031KE1T RoHS compliant?","answer":"The evidence does not explicitly list RoHS status. Confirm compliance with the datasheet or your supplier at RFQ time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/DSC400-4444Q0031KE1T","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/DSC400-4444Q0031KE1T 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}}