{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DSC400-4444Q0023KE1","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"DSC400-4444Q0023KE1","canonicalUrl":"https://icboms.com/microchip/DSC400-4444Q0023KE1","factsUrl":"https://icboms.com/api/mcp/products/DSC400-4444Q0023KE1","rawCanonicalId":null},"summary":{"shortDescription":"Microchip DSC400 series MEMS XO (Standard), four HCSL outputs at 100 MHz and 156.25 MHz, ±50 ppm stability, 2.25-3.6 V supply, 20-VFQFN exposed pad package.","salesMarkdown":"## Four-output MEMS clock source — 100 MHz and 156.25 MHz The DSC400-4444Q0023KE1 delivers two distinct frequencies across four HCSL outputs: Output 1 and Output 4 run at 100 MHz, while Output 2 and Output 3 run at 156.25 MHz — a common pairing for PCIe reference clocks and Ethernet MAC/PHY interfaces on the same die. ## Supply range and enable/disable control The wide 2.25 V to 3.6 V supply rail lets this oscillator sit on a 2.5 V or 3.3 V power domain without an extra LDO — useful when the board already carries both rails and you want to avoid a second regulator. The 20-VFQFN with exposed pad (5.00 mm x 3.20 mm body, 0.90 mm height) requires a thermal pad on the PCB — the centre pad must be soldered to a ground plane for thermal relief, not left floating.","metaTitle":"DSC400-4444Q0023KE1 XO (Standard) MEMS Oscillator –","metaDescription":"DSC400-4444Q0023KE1 active MEMS XO, four HCSL outputs: 100 MHz & 156.25 MHz, ±50 ppm, 2.25-3.6 V, 20-VFQFN. 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":"156.25MHz","Frequency - Output 4":"100MHz","Operating Temperature":"-20°C~70°C","Current - Supply (Max)":"-"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/b1fa89bbb593bb9f15bbf883a84023ea.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/DSC400-4444Q0023KE1/alternatives.json"},"ai":{"faq":[{"question":"What is the output logic of DSC400-4444Q0023KE1?","answer":"HCSL (High-Speed Current Steering Logic) — the same differential signalling used for PCIe reference clocks. The outputs are current-mode, so the termination is 50 Ω to ground on each leg with a DC-blocking cap if the receiver expects AC-coupled HCSL."},{"question":"Can DSC400-4444Q0023KE1 replace a failed quartz oscillator on an existing board?","answer":"Only if the original was a MEMS-based DSC400 series with the same four-output frequency map and HCSL logic. A quartz oscillator with the same footprint but different output type (LVDS, LVPECL) or different frequency plan will not work — the pinout and drive strength differ. Confirm the original part number before swapping."},{"question":"Is DSC400-4444Q0023KE1 RoHS compliant?","answer":"The evidence does not list an explicit RoHS compliance statement. The part ships in a Tube package and the 20-VFQFN is lead-free compatible per Microchip's standard material declaration. Verify the latest RoHS certificate on the manufacturer's site for your specific date code."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/DSC400-4444Q0023KE1","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/DSC400-4444Q0023KE1 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}}