{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DSC1121CI2-066.6660","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"DSC1121CI2-066.6660","canonicalUrl":"https://icboms.com/microchip/DSC1121CI2-066.6660","factsUrl":"https://icboms.com/api/mcp/products/DSC1121CI2-066.6660","rawCanonicalId":null},"summary":{"shortDescription":"Microchip DSC1121 series MEMS XO, 66.666 MHz CMOS output, ±25 ppm stability, 2.25V–3.6V supply, -40°C to +85°C, 6-SMD no-lead package","salesMarkdown":"## 66.666 MHz MEMS XO with ±25 ppm stability Frequency is 66.666 MHz, a common multiple for Ethernet PHYs, USB controllers, and some ARM Cortex-M clock trees — the ±25 ppm stability (Frequency Stability ±25ppm) keeps the jitter budget tight enough for 100BASE-TX or USB full-speed without a separate TCXO. ## Supply voltage range 2.25V–3.6V The supply voltage range of 2.25V–3.6V (Voltage - Supply 2.25V~3.6V) covers both 2.5V and 3.3V rails without a separate regulator — a single BOM line works across boards with different core voltages, which simplifies inventory if you build multiple variants. At 3.3V the max supply current is 35 mA (Current - Supply (Max) 35mA); when the output is disabled via the Enable/Disable pin the current drops to 22 mA max (Current - Supply (Disable) (Max) 22mA) — the disable current is still non-zero because the MEMS oscillator core stays powered, but it saves 13 mA when the clock is gated. ## Active lifecycle — no last-time-buy risk","metaTitle":"DSC1121CI2-066.6660 MEMS XO 66.666 MHz CMOS 2.25V–3.6V","metaDescription":"Microchip DSC1121CI2-066.6660 MEMS oscillator, 66.666 MHz CMOS output, ±25 ppm stability, -40°C to +85°C, 6-SMD no-lead. Active production, sourced per RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Crystals & Oscillators"],"specifications":{"Mfr":"Microchip Technology","Type":"XO (Standard)","Output":"CMOS","Series":"DSC1121","Package":"Tube","Ratings":"-","Function":"Enable/Disable","Frequency":"66.666 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":"DSC1121","Frequency Stability":"±25ppm","Height - Seated (Max)":"0.035\\\" (0.90mm)","Operating Temperature":"-40°C~85°C","Current - Supply (Max)":"35mA","Absolute Pull Range (APR)":"-","Spread Spectrum Bandwidth":"-","Current - Supply (Disable) (Max)":"22mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.0500","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/4ad75d2f22fe92055f4a953b00c76a2c.pdf","sourceUrl":null},"ai":{"faq":[{"question":"How does the enable/disable function work on the DSC1121CI2-066.6660?","answer":"The Enable/Disable pin gates the CMOS output. When disabled, the output is tri-stated (high-impedance) and the supply current drops from 35 mA max to 22 mA max — the MEMS oscillator core remains powered, so the disable current is not zero."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/DSC1121CI2-066.6660","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/DSC1121CI2-066.6660 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}}