{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DSC1121AI1-155.5200T","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"DSC1121AI1-155.5200T","canonicalUrl":"https://icboms.com/microchip/DSC1121AI1-155.5200T","factsUrl":"https://icboms.com/api/mcp/products/DSC1121AI1-155.5200T","rawCanonicalId":null},"summary":{"shortDescription":"Microchip DSC1121AI1-155.5200T, XO (Standard) MEMS oscillator, 155.52 MHz, CMOS output, ±50 ppm stability, 2.25 V to 3.6 V supply, -40°C to 85°C, AEC-Q100 qualified, 6-SMD package, tape & reel.","salesMarkdown":"That frequency is a standard telecom/data-com rate used in 1 GbE, SONET/SDH, and PCIe Gen 1/2 reference clocks, so it drops straight into the clock tree without a PLL multiplier. ## Supply flexibility and output control The enable/disable pin tri-states the output — useful for power-down sequencing or in-circuit test isolation without cycling the supply. For a 155.52 MHz clock, that translates to a maximum frequency error of about ±7.8 kHz — tight enough for most 1 GbE and PCIe Gen 1/2 links without a separate VCXO or PLL cleanup stage. The 6-SMD package with no-lead exposed pad measures 7.00 mm × 5.00 mm with a seated height of 0.90 mm. Reworking this package under hot air is straightforward: the pad pitch is wide enough that a standard fine-tip nozzle clears the adjacent components. The orientation mark is on the top surface — confirm pin 1 location before placement, because the exposed pad is symmetric and a 180° rotation will short the output to ground.","metaTitle":"DSC1121AI1-155.5200T – Microchip MEMS XO, 155.52 MHz, CMOS","metaDescription":"Microchip DSC1121AI1-155.5200T MEMS oscillator: 155.52 MHz, CMOS output, ±50 ppm stability, 2.25-3.6 V supply, -40°C to 85°C, AEC-Q100.","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":"AEC-Q100","Function":"Enable/Disable","Frequency":"155.52 MHz","Mounting Type":"Surface Mount","Base Resonator":"MEMS","Package / Case":"6-SMD, No Lead 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":"±50ppm","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":"Is the DSC1121AI1-155.5200T AEC-Q100 qualified?","answer":"Yes, it is rated AEC-Q100, which qualifies it for automotive applications including under-hood and chassis domains."},{"question":"Does the DSC1121AI1-155.5200T have an enable/disable function?","answer":"Yes, the part includes an enable/disable function that tri-states the CMOS output for power-down or test isolation."},{"question":"Can I use a 155.52 MHz oscillator for a PCIe reference clock?","answer":"Yes, 155.52 MHz is a standard reference frequency for PCIe Gen 1 and Gen 2. The ±50 ppm stability meets the ±300 ppm total tolerance requirement for most PCIe root complexes and switches. Confirm the jitter specification in your PCIe PHY datasheet before committing."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/DSC1121AI1-155.5200T","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/DSC1121AI1-155.5200T 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}}