{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DSC1124CI5-156.2578","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"DSC1124CI5-156.2578","canonicalUrl":"https://icboms.com/microchip/DSC1124CI5-156.2578","factsUrl":"https://icboms.com/api/mcp/products/DSC1124CI5-156.2578","rawCanonicalId":null},"summary":{"shortDescription":"Microchip Technology DSC1124 series XO (Standard), 156.2578 MHz, HCSL output, MEMS base, 6-SMD No Lead 3.2mm x 2.5mm, ±10 ppm, -40°C to 85°C, Enable/Disable.","salesMarkdown":"## 156.2578 MHz HCSL clock source for PCIe reference The DSC1124CI5-156.2578: HCSL is the differential signaling standard for PCIe reference clocks — this oscillator is a direct fit for a PCIe Gen 1/2/3 root complex or switch where the 100 MHz reference is multiplied up, or for any 156.2578 MHz SerDes clock requiring the low-swing, 0.7 Vpp typical swing of HCSL. ## Supply voltage and temperature envelope The 42 mA max supply current at 156.2578 MHz is the figure to budget in the clock-tree power calculation; the disable current of 22 mA confirms the Enable pin is worth routing. Because it is a standard MEMS XO with a common package and output logic, second-sourcing is straightforward: any DSC1124-series oscillator programmed to 156.2578 MHz with HCSL output and ±10 ppm stability is a drop-in. The base product number DSC1124 covers the full family, and the specific code CI5-156.2578 encodes the stability, temperature range, and frequency.","metaTitle":"Microchip DSC1124CI5-156.2578 XO, 156.2578 MHz, HCSL","metaDescription":"Microchip DSC1124CI5-156.2578 MEMS XO, 156.2578 MHz, HCSL output, ±10 ppm stability, -40°C to 85°C. Active production. Request a quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Crystals & Oscillators"],"specifications":{"Mfr":"Microchip Technology","Type":"XO (Standard)","Output":"HCSL","Series":"DSC1124","Package":"Tube","Ratings":"-","Function":"Enable/Disable","Frequency":"156.2578 MHz","Mounting Type":"Surface Mount","Base Resonator":"MEMS","Package / Case":"6-SMD, No Lead","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":"DSC1124","Frequency Stability":"±10ppm","Height - Seated (Max)":"0.035\\\" (0.90mm)","Operating Temperature":"-40°C~85°C","Current - Supply (Max)":"42mA","Absolute Pull Range (APR)":"-","Spread Spectrum Bandwidth":"-","Current - Supply (Disable) (Max)":"22mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$4.1700","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/11b93dcf3fe2344432ea2f214a7ea724.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the output logic of the DSC1124CI5-156.2578?","answer":"The output is HCSL (High-Speed Current Steering Logic), a differential standard with a typical swing of 0.7 Vpp. It is the reference clock format specified for PCIe interfaces and is also used in some SerDes and networking applications. The oscillator does not have an LVCMOS or LVPECL output option — the HCSL output is fixed by the order code."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/DSC1124CI5-156.2578","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/DSC1124CI5-156.2578 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}}