{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DSC400-0404Q0020KE1T","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"DSC400-0404Q0020KE1T","canonicalUrl":"https://icboms.com/microchip/DSC400-0404Q0020KE1T","factsUrl":"https://icboms.com/api/mcp/products/DSC400-0404Q0020KE1T","rawCanonicalId":null},"summary":{"shortDescription":"Microchip DSC400 series, XO (Standard) MEMS oscillator, HCSL output, dual frequencies 125 MHz and 100 MHz, ±50 ppm stability, 2.25 V to 3.6 V supply, -20°C to 70°C, 20-VFQFN exposed pad package, Tape & Reel.","salesMarkdown":"## MEMS XO with HCSL – dual-frequency clock source The DSC400-0404Q0020KE1T is a MEMS-based XO (Standard) from Microchip's DSC400 series, delivering two fixed output frequencies: 125 MHz on Output 1 and 100 MHz on Output 2, both in HCSL logic levels. HCSL (High-Speed Current Steering Logic) is the common clock standard for PCI Express reference clocks — this oscillator can directly drive a PCIe Gen1/2/3 PLL without external level translation. Supply voltage spans 2.25 V to 3.6 V, covering 2.5 V and 3.3 V rails with margin; the Enable/Disable function lets the system gate the outputs for power sequencing or test modes. ## Frequency stability and temperature grade The -20°C lower limit means this part is specified for indoor, office, or appliance environments; it is not rated for outdoor base stations, engine bays, or cold storage where -40°C operation is needed. Housed in a 20-VFQFN with exposed pad (5.00 mm x 3.20 mm, 0.90 mm height), the package requires a thermal via array under the pad for proper heat transfer and mechanical stability — the exposed pad must be soldered to a ground plane.","metaTitle":"DSC400-0404Q0020KE1T MEMS XO – HCSL, 125/100 MHz, Active","metaDescription":"Microchip DSC400-0404Q0020KE1T MEMS XO, HCSL output, 125 MHz + 100 MHz, ±50 ppm stability, 2.25-3.6 V supply, -20 to 70°C, 20-VFQFN. Active production.","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":"125MHz","Frequency - Output 2":"100MHz","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/b1fa89bbb593bb9f15bbf883a84023ea.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the output type of DSC400-0404Q0020KE1T?","answer":"HCSL (High-Speed Current Steering Logic) — the standard differential clock format for PCI Express reference clocks."},{"question":"Is DSC400-0404Q0020KE1T RoHS compliant?","answer":"RoHS compliance is standard for the DSC400 series from Microchip. The evidence does not list a separate RoHS certificate, but the part is supplied on Tape & Reel and is a current-production MEMS oscillator — confirm with your Microchip field-app or our quote desk if a specific RoHS declaration is required for your compliance file."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/DSC400-0404Q0020KE1T","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/DSC400-0404Q0020KE1T 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}}