{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DSC400-4444Q0023KI1","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"DSC400-4444Q0023KI1","canonicalUrl":"https://icboms.com/microchip/DSC400-4444Q0023KI1","factsUrl":"https://icboms.com/api/mcp/products/DSC400-4444Q0023KI1","rawCanonicalId":null},"summary":{"shortDescription":"Microchip DSC400 series MEMS XO (Standard), dual-output HCSL at 100 MHz and 156.25 MHz, ±50 ppm stability, 2.25 V–3.6 V supply, -40°C to 85°C, 20-VFQFN exposed pad package.","salesMarkdown":"## MEMS resonator, dual HCSL clock outputs The DSC400-4444Q0023KI1 is a MEMS-based XO (Standard) from Microchip's DSC400 series, delivering two fixed HCSL outputs at 100 MHz and 156.25 MHz — common reference frequencies for PCIe Gen3/4 and 10GbE SerDes clock trees. The supply voltage spans 2.25 V to 3.6 V, covering 2.5 V and 3.3 V rails commonly found in FPGAs and SoCs — no extra regulator needed if the rail is within this window. ## 20-VFQFN package and enable/disable function Housed in a 20-VFQFN with exposed pad (5.00 mm x 3.20 mm, 0.90 mm height), the package requires a thermal pad on the PCB for heat sinking — the exposed pad must be soldered to a ground plane to meet the datasheet thermal resistance. No stock-holding claim; sourced through independent distribution channels.","metaTitle":"DSC400-4444Q0023KI1 MEMS XO – 100 MHz & 156.25 MHz HCSL","metaDescription":"Microchip DSC400-4444Q0023KI1 MEMS XO, 100 MHz & 156.25 MHz HCSL outputs, ±50 ppm stability, -40°C to 85°C, 20-VFQFN. Active production, 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":"±50ppm","Frequency - Output 1":"100MHz","Frequency - Output 2":"156.25MHz","Frequency - Output 3":"-","Frequency - Output 4":"-","Operating Temperature":"-40°C~85°C","Current - Supply (Max)":"-"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/17298f21a67a7945826b04ab2911ec92.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/DSC400-4444Q0023KI1/alternatives.json"},"ai":{"faq":[{"question":"Can the DSC400-4444Q0023KI1 replace a standard quartz oscillator?","answer":"Yes, it is a drop-in functional replacement for a quartz XO with the same frequency and output type, but the MEMS resonator offers better shock/vibration tolerance and typically shorter lead times. Confirm the footprint matches the 20-VFQFN (5.00 mm x 3.20 mm) and the supply voltage is within 2.25 V–3.6 V."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/DSC400-4444Q0023KI1","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/DSC400-4444Q0023KI1 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}}