{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DSC400-4444Q0015KE2","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"DSC400-4444Q0015KE2","canonicalUrl":"https://icboms.com/microchip/DSC400-4444Q0015KE2","factsUrl":"https://icboms.com/api/mcp/products/DSC400-4444Q0015KE2","rawCanonicalId":null},"summary":{"shortDescription":"Microchip DSC400 series MEMS XO (Standard), 20-VFQFN exposed pad, HCSL outputs, enable/disable function, ±25 ppm stability, 2.25V–3.6V supply","salesMarkdown":"## Multi-output HCSL clock source for dense timing trees The DSC400-4444Q0015KE2 is a MEMS-based XO (Standard) that delivers four HCSL outputs from a single 20-VFQFN package — two banks at 25/50/125/150 MHz and a second pair at 100/156.25 MHz. That covers a typical networking reference set (PCIe Gen3 100 MHz, 1GbE 125 MHz, SATA 150 MHz) without separate oscillators for each rail. The ±25 ppm frequency stability holds across the full -20°C to +70°C commercial range and the 2.25V–3.6V supply window, so a 2.5V or 3.3V rail feeds it directly without an LDO. MEMS oscillators start up in under 5 ms typical (vs 10–20 ms for a quartz XO) and survive 50,000 g shock — useful if the board sees handling in assembly or vibration in a fan-cooled chassis. The 20-VFQFN with exposed pad (5.00 mm × 3.20 mm, 0.90 mm height) needs a thermal via array under the paddle for the pad solder joint reliability — the datasheet landing pattern is the reference, not a generic QFN footprint. If a second-source is needed, the closest functional match would be another MEMS XO with the same output format and frequency plan — but the pinout and supply range must be verified against the target socket.","metaTitle":"DSC400-4444Q0015KE2 MEMS XO – 4-Output HCSL, ±25 ppm, Active","metaDescription":"Microchip DSC400-4444Q0015KE2 XO (Standard) with HCSL outputs at 25/50/125/150 MHz and 100/156.25 MHz. ±25 ppm stability, 2.25V–3.6V supply, 20-VFQFN.","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":"25MHz, 50MHz, 125MHz, 150MHz","Frequency - Output 2":"100MHz, 156.25MHz","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":"What is the frequency stability of the DSC400-4444Q0015KE2?","answer":"±25 ppm total frequency stability over the operating temperature range and supply voltage variation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/DSC400-4444Q0015KE2","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/DSC400-4444Q0015KE2 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}}