{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DSC2044FE1-H0003T","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"DSC2044FE1-H0003T","canonicalUrl":"https://icboms.com/microchip/DSC2044FE1-H0003T","factsUrl":"https://icboms.com/api/mcp/products/DSC2044FE1-H0003T","rawCanonicalId":null},"summary":{"shortDescription":"Microchip DSC2044FE1-H0003T, XO (Standard), MEMS resonator, dual HCSL outputs at 100 MHz and 125 MHz, ±50 ppm stability, 2.25V–3.6V supply, 14-VFQFN exposed-pad package","salesMarkdown":"## Dual-output HCSL clock generator for PCIe and Ethernet The DSC2044FE1-H0003T is a MEMS-based XO that generates two HCSL outputs simultaneously: 100 MHz on Output 1 and 125 MHz on Output 2, with an additional 156.25 MHz option on Output 2. HCSL (High-Speed Current Steering Logic) is the standard differential signalling for PCIe reference clocks — this part directly drives a PCIe Gen 1/2/3 PHY without an external level translator. The ±50 ppm frequency stability over -20°C to +70°C meets the ±50 ppm requirement for PCIe Gen 1/2/3 reference clocks, eliminating the need for external temperature compensation. ## Supply voltage and power management The 2.25V to 3.6V supply range covers both 2.5V and 3.3V rails — a single BOM line works across different voltage domains without a dedicated regulator. Maximum supply current is 60 mA typical; the enable/disable pin drops consumption to 23 mA in the disabled state, allowing power gating in sleep modes without an external load switch. The 0.50 mm pitch QFN footprint demands tight solder-paste stencil aperture control; a 0.125 mm stencil thickness with 1:1 aperture-to-pad ratio is typical for this class of package.","metaTitle":"DSC2044FE1-H0003T MEMS XO – 100 MHz / 125 MHz HCSL, Active","metaDescription":"Microchip DSC2044FE1-H0003T dual-output HCSL XO: 100 MHz and 125 MHz, ±50 ppm, 2.25V–3.6V, enable/disable. 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":"DSC2044","Package":"Tape & Reel (TR)","Function":"Enable/Disable","Base Resonator":"MEMS","Package / Case":"14-VFQFN Exposed Pad","Product Status":"Active","lifecycle_stage":"eol_hot","Size / Dimension":"0.126\\\" L x 0.098\\\" W (3.20mm x 2.50mm)","Voltage - Supply":"2.25V ~ 3.6V","Base Product Number":"DSC2044","Frequency Stability":"±50ppm","Frequency - Output 1":"100MHz, 125MHz","Frequency - Output 2":"100MHz, 125Mhz, 156.25MHz","Frequency - Output 3":"-","Frequency - Output 4":"-","Operating Temperature":"-20°C~70°C","Current - Supply (Max)":"60mA (Typ)","Current - Supply (Disable) (Max)":"23 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/961a0622be7bfe0860b322926ab30ab9.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the frequency stability of the DSC2044FE1-H0003T?","answer":"The DSC2044FE1-H0003T specifies ±50 ppm frequency stability over its -20°C to +70°C operating temperature range. This meets the ±50 ppm requirement for PCIe Gen 1/2/3 reference clocks without external compensation."},{"question":"Does the DSC2044FE1-H0003T have an enable/disable pin?","answer":"Yes, the DSC2044FE1-H0003T includes an enable/disable function. When disabled, the supply current drops to 23 mA maximum, allowing the oscillator to be shut down in sleep modes without a dedicated load switch."},{"question":"Is the DSC2044FE1-H0003T compatible with PCIe?","answer":"Yes. The part outputs HCSL differential signalling at 100 MHz and 125 MHz, which are standard PCIe reference clock frequencies. The ±50 ppm stability meets PCIe Gen 1/2/3 requirements. No external level translator is needed to drive a PCIe PHY."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/DSC2044FE1-H0003T","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/DSC2044FE1-H0003T 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}}