{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DSC400-0444Q0009KE1T","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"DSC400-0444Q0009KE1T","canonicalUrl":"https://icboms.com/microchip/DSC400-0444Q0009KE1T","factsUrl":"https://icboms.com/api/mcp/products/DSC400-0444Q0009KE1T","rawCanonicalId":null},"summary":{"shortDescription":"Microchip DSC400 series MEMS XO, 100 MHz HCSL output, 2.25 V to 3.6 V supply, ±50 ppm stability, 20-VFQFN exposed pad, -20°C to 70°C","salesMarkdown":"## Three 100 MHz HCSL lanes from a MEMS resonator HCSL is the differential signalling standard used for PCIe reference clocks — the 100 MHz frequency matches the PCIe Gen 1/2/3 base clock rate, so this part can serve as the common clock source for multiple PCIe lanes or SerDes channels on a board. The supply voltage range of 2.25 V to 3.6 V lets it run off either a 2.5 V or 3.3 V rail without an intermediate regulator. ## Temperature grade and package constraints It fits indoor telecom switches, server motherboards, and office networking gear — not outdoor base stations or under-hood automotive. The 20-VFQFN exposed-pad package (5.00 mm x 3.20 mm, 0.90 mm height) requires a thermal pad on the PCB for heat sinking; the pad also provides a low-inductance ground return for the HCSL outputs.","metaTitle":"DSC400-0444Q0009KE1T MEMS XO 100 MHz HCSL Quad Output","metaDescription":"Microchip DSC400-0444Q0009KE1T MEMS XO, 100 MHz HCSL output, 2.25-3.6 V supply, ±50 ppm stability, -20 to 70°C. Active production. Request quote.","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":"100MHz","Frequency - Output 2":"100MHz","Frequency - Output 3":"100MHz","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/b247d1214c1ba7a1d3d65d986154f631.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the output frequency of DSC400-0444Q0009KE1T?","answer":"All three outputs are 100 MHz HCSL. The part is configured for three identical lanes — there is no programmable divider on the outputs."},{"question":"What supply voltage does DSC400-0444Q0009KE1T need?","answer":"It accepts 2.25 V to 3.6 V, covering both 2.5 V and 3.3 V rails. The same part can be used across boards with different core voltages without a BOM change."},{"question":"Does DSC400-0444Q0009KE1T have an enable/disable function?","answer":"Yes, the part includes an Enable/Disable pin. When disabled, the outputs go into a high-impedance state, which allows sharing the clock net with a redundant oscillator or powering down the clock tree during sleep modes."},{"question":"What package does DSC400-0444Q0009KE1T come in?","answer":"It is supplied in a 20-VFQFN exposed-pad package measuring 5.00 mm x 3.20 mm with a 0.90 mm height. The exposed pad must be soldered to a thermal land on the PCB for proper heat dissipation and ground return."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/DSC400-0444Q0009KE1T","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/DSC400-0444Q0009KE1T 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}}