{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DSC400-4444Q0023KE2","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"DSC400-4444Q0023KE2","canonicalUrl":"https://icboms.com/microchip/DSC400-4444Q0023KE2","factsUrl":"https://icboms.com/api/mcp/products/DSC400-4444Q0023KE2","rawCanonicalId":null},"summary":{"shortDescription":"Microchip Technology DSC400 series, XO (Standard) MEMS oscillator, dual output 100 MHz & 156.25 MHz, HCSL logic, ±25 ppm stability, 2.25 V ~ 3.6 V supply, 20-VFQFN exposed pad package, tube","salesMarkdown":"## Dual-frequency MEMS clock source for PCIe and Ethernet The DSC400-4444Q0023KE2 is a MEMS-based XO that outputs two fixed frequencies: 100 MHz on output 1 and 156.25 MHz on output 2, both in HCSL logic level — a differential standard common to PCIe reference clocks and 10GbE SerDes. The base resonator is MEMS rather than quartz, which gives better shock and vibration tolerance — useful if the board lives in a portable instrument or a fan-cooled chassis where quartz can micro-fracture over time. Supply voltage spans 2.25 V to 3.6 V, so it runs off a 2.5 V or 3.3 V rail without an extra LDO. Rated for -20°C to 70°C, so it belongs in an indoor PCB or office equipment, not an engine bay or outdoor telecom cabinet. Frequency stability is ±25 ppm across the full temperature range — tight enough for most 1GbE and PCIe Gen 3 links without needing a TCXO. Microchip lists the DSC400-4444Q0023KE2 as Active — no last-time-buy window or NRND flag, so it can go into a new design without worrying about a sudden EOL notice. Sourced through independent distribution; quoted to order against the BOM quantity.","metaTitle":"DSC400-4444Q0023KE2 MEMS XO – 100 MHz & 156.25 MHz HCSL","metaDescription":"Active Microchip DSC400 MEMS XO, dual output 100 MHz & 156.25 MHz, HCSL logic, ±25 ppm stability, 2.25-3.6 V supply, 20-VFQFN. Quoted to order.","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","Frequency - Output 2":"156.25MHz","Frequency - Output 3":"-","Frequency - Output 4":"-","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/17298f21a67a7945826b04ab2911ec92.pdf","sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/DSC400-4444Q0023KE2","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/DSC400-4444Q0023KE2 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}}