{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DSC6121HI2A-0090T","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"DSC6121HI2A-0090T","canonicalUrl":"https://icboms.com/microchip/DSC6121HI2A-0090T","factsUrl":"https://icboms.com/api/mcp/products/DSC6121HI2A-0090T","rawCanonicalId":null},"summary":{"shortDescription":"Microchip Technology DSC61XX series, XO (Standard) MEMS oscillator, order code DSC6121HI2A-0090T, dual output 6.1298MHz & 6.1679MHz, CMOS, ±25ppm, 4-VFLGA package.","salesMarkdown":"## Obsolete but findable — the sourcing reality for DSC6121HI2A-0090T Microchip officially lists the DSC6121HI2A-0090T as Obsolete. No successor part number is provided in the record, so the only path to this exact order code is through surplus or broker inventory — not a last-time-buy from the factory. ## Dual-frequency output — what the 6.1298 MHz and 6.1679 MHz mean This XO (Standard) generates two independent CMOS clock outputs: 6.1298 MHz and 6.1679 MHz. That pair is unusual — it is not a common base frequency like 25 MHz or 50 MHz — which suggests it was designed for a specific chipset or SoC that requires two slightly offset reference clocks, possibly for a SerDes or a dual-core timing domain. ## Package and temperature — board-fit and deployment That is a tiny land-grid array — the footprint is smaller than a 0805 resistor. Replacing it on a board requires a hot-air station with a fine nozzle; the pad pitch is not specified but at this body size it is likely 0.50 mm or tighter. No exposed thermal pad to worry about, but the solder paste volume needs to be precise to avoid bridging.","metaTitle":"Microchip DSC6121HI2A-0090T MEMS XO, 6.1298/6.1679MHz","metaDescription":"Microchip DSC6121HI2A-0090T MEMS XO, dual output 6.1298MHz & 6.1679MHz, CMOS, ±25ppm, 4-VFLGA, -40°C~85°C. Obsolete — sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Crystals & Oscillators"],"specifications":{"Mfr":"Microchip Technology","Type":"XO (Standard)","Height":"0.035\\\" (0.89mm)","Output":"CMOS","Series":"DSC61XX","Package":"Tape & Reel (TR); Cut Tape (CT)","Function":"-","Base Resonator":"MEMS","Package / Case":"4-VFLGA","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Size / Dimension":"0.063\\\" L x 0.047\\\" W (1.60mm x 1.20mm)","Voltage - Supply":"1.71V ~ 3.63V","Frequency Stability":"±25ppm","Frequency - Output 1":"6.1298MHz, 6.1679MHz","Frequency - Output 2":"-","Frequency - Output 3":"-","Frequency - Output 4":"-","Operating Temperature":"-40°C~85°C","Current - Supply (Max)":"3mA (Typ)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.1700","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/1228b1baf388c49094d52b76abcfca61.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to the DSC6121HI2A-0090T?","answer":"No official pin-compatible successor is listed in the record. The DSC61XX family includes many MEMS XOs in the same 4-VFLGA package, but none are confirmed as a direct drop-in with the same dual-frequency pair. A parametric search for a dual-output MEMS XO in 4-VFLGA with a similar supply range and temperature grade would be the next step — but that requires a board spin or at least a timing validation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/DSC6121HI2A-0090T","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/DSC6121HI2A-0090T when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-19T21:29:41.326Z","lastPublished":"2026-07-19T21:29:41.326Z","indexable":true}}