{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DSC1121AI5-041.5000T","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"DSC1121AI5-041.5000T","canonicalUrl":"https://icboms.com/microchip/DSC1121AI5-041.5000T","factsUrl":"https://icboms.com/api/mcp/products/DSC1121AI5-041.5000T","rawCanonicalId":null},"summary":{"shortDescription":"Microchip DSC1121AI5-041.5000T, XO (Standard) MEMS oscillator, 41.5 MHz CMOS output, ±10 ppm frequency stability, 2.25-3.6V supply, -40 to 85°C, 6-VDFN exposed pad package, tape and reel.","salesMarkdown":"## MEMS oscillator at 41.5 MHz — why it replaces quartz The DSC1121AI5-041.5000T is a MEMS-based XO (Standard) from Microchip's DSC1121 series, delivering a fixed 41.5 MHz CMOS output with ±10 ppm frequency stability across the full -40 to 85°C industrial range. Unlike a quartz crystal oscillator, the MEMS resonator is immune to vibration-induced frequency shifts and has no start-up reliability issues — a common failure mode in high-shock environments like motor drives or portable instrumentation. The 2.25V to 3.6V supply range means the same BOM line works on a 2.5V or 3.3V rail without a separate regulator; the Enable/Disable function lets the system shut the oscillator off when the clock tree is idle, drawing 22 mA max in disable. Because it is a standard XO from a broad MEMS oscillator family, supply continuity is better than a niche quartz part. The MEMS die is sourced from a single Microchip fab, so there is no multi-source qualification risk — but the wide voltage range and CMOS output make it straightforward to cross-reference against other 41.5 MHz XOs if a second source is required. ## Package and footprint — 6-VDFN with exposed pad The 6-VDFN Exposed Pad package measures 7.00 mm x 5.00 mm with a seated height of 0.90 mm max. The 35 mA max supply current at 41.5 MHz is low enough that the thermal pad is more about mechanical stability than heat dissipation — but skipping the pad solder joint can cause intermittent clock loss under vibration, especially in the -40°C cold corner where solder contracts.","metaTitle":"DSC1121AI5-041.5000T MEMS XO 41.5 MHz CMOS ±10 ppm -40 to","metaDescription":"Microchip DSC1121AI5-041.5000T — MEMS-based XO, 41.5 MHz, CMOS output, ±10 ppm stability, 2.25-3.6V supply, -40 to 85°C. 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)","Output":"CMOS","Series":"DSC1121","Package":"Tape & Reel (TR)","Ratings":"-","Function":"Enable/Disable","Frequency":"41.5 MHz","Mounting Type":"Surface Mount","Base Resonator":"MEMS","Package / Case":"6-VDFN Exposed Pad","Product Status":"Active","lifecycle_stage":"eol_hot","Size / Dimension":"0.276\\\" L x 0.197\\\" W (7.00mm x 5.00mm)","Voltage - Supply":"2.25V ~ 3.6V","Base Product Number":"DSC1121","Frequency Stability":"±10ppm","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":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/4ad75d2f22fe92055f4a953b00c76a2c.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Can DSC1121AI5-041.5000T be used with a 1.8V supply?","answer":"No — the supply range is 2.25V to 3.6V minimum. A 1.8V rail is below the minimum operating voltage; the oscillator will not start or maintain frequency lock. Use a 2.5V or 3.3V rail, or add a small boost regulator if only 1.8V is available on the board."},{"question":"Does DSC1121AI5-041.5000T have an equivalent from SiTime?","answer":"SiTime offers many 41.5 MHz MEMS XOs in similar 6-pin DFN packages (e.g., SiT8208 or SiT9121 series), but pin compatibility is not guaranteed — the Enable/Disable logic polarity and pad layout differ. Always compare the datasheet footprint and function table before substituting. The DSC1121 uses a standard CMOS output with active-high enable; verify the SiTime part matches that logic."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/DSC1121AI5-041.5000T","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/DSC1121AI5-041.5000T 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}}