{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DSC400-0444Q0009KE2","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"DSC400-0444Q0009KE2","canonicalUrl":"https://icboms.com/microchip/DSC400-0444Q0009KE2","factsUrl":"https://icboms.com/api/mcp/products/DSC400-0444Q0009KE2","rawCanonicalId":null},"summary":{"shortDescription":"Microchip DSC400 series MEMS XO (Standard), 20-VFQFN exposed pad, 100MHz HCSL x3 outputs, ±25ppm stability, 2.25V~3.6V supply, -20°C~70°C operating range.","salesMarkdown":"## Active MEMS XO – three 100MHz HCSL lanes Frequency stability is ±25ppm over the -20°C to +70°C commercial temperature range, which keeps the 100MHz HCSL edge placement within 250 ps of ideal across temperature — adequate for PCIe Gen1/2 reference clocks and high-speed serial links that budget 50-100 ppm total error. Supply voltage spans 2.25V to 3.6V, so the part runs directly off a 2.5V or 3.3V rail without an external LDO, and the enable/disable pin lets the system gate the outputs during low-power standby without cycling the main supply. The 20-VFQFN exposed pad (5.00mm x 3.20mm body, 0.90mm height) requires a thermal via array under the paddle to conduct heat to the ground plane — without it, the junction temperature rises above the 70°C ambient ceiling during continuous HCSL switching. HCSL outputs are differential and require external 50-ohm termination to ground at the receiver per the HCSL standard — the oscillator itself does not include on-die termination, so the PCB layout must place the resistors within 0.5 inch of the load pins to maintain signal integrity at 100MHz.","metaTitle":"DSC400-0444Q0009KE2 MEMS XO – 100MHz HCSL, Active","metaDescription":"Microchip DSC400-0444Q0009KE2 – MEMS XO (Standard), 3x100MHz HCSL outputs, ±25ppm, 2.25-3.6V, -20°C~70°C, 20-VFQFN. 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":"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":"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":"Does DSC400-0444Q0009KE2 have a built-in enable/disable feature?","answer":"Yes, the function is Enable/Disable. The enable pin gates all three HCSL outputs simultaneously — pulling it low puts the outputs into high-impedance state without removing the supply voltage, which saves power during system idle without a full power-cycle."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/DSC400-0444Q0009KE2","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/DSC400-0444Q0009KE2 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}}