{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DSC1122CI2-156.2500T","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"DSC1122CI2-156.2500T","canonicalUrl":"https://icboms.com/microchip/DSC1122CI2-156.2500T","factsUrl":"https://icboms.com/api/mcp/products/DSC1122CI2-156.2500T","rawCanonicalId":null},"summary":{"shortDescription":"Microchip DSC1122 series MEMS XO, 156.2500 MHz, LVPECL output, ±25 ppm stability, 2.25 V to 3.6 V supply, -40°C to +85°C, 6-SMD, tape and reel","salesMarkdown":"## 156.25 MHz LVPECL clock for high-speed interfaces The DSC1122CI2-156.2500T is a MEMS-based XO (standard oscillator) delivering a 156.25 MHz LVPECL output — a common reference frequency for 10GbE, Fibre Channel, and PCIe Gen 3/4 SerDes PLLs. ## Supply voltage tolerance and enable/disable control Operates from 2.25 V to 3.6 V — a single rail that covers 2.5 V and 3.3 V logic families without an external regulator. That 22 mA floor is the MEMS oscillator core still running; for a true zero-power state, the supply rail must be switched externally. ## 6-SMD footprint and layout considerations Packaged in a 6-SMD, no-lead ceramic package measuring 3.20 mm × 2.50 mm with a seated height of 0.90 mm. The 0.126\" × 0.098\" footprint is the same as a standard 3.2×2.5 mm quartz oscillator — a drop-in replacement for existing layouts. The LVPECL output requires 50 Ω termination to VCC - 2 V at the receiver; route the differential pair with controlled impedance and keep the trace length under 0.5\" to avoid reflections at 156.25 MHz. Listed as Active by Microchip.","metaTitle":"DSC1122CI2-156.2500T 156.25 MHz LVPECL MEMS Oscillator","metaDescription":"DSC1122CI2-156.2500T: 156.25 MHz LVPECL XO, MEMS resonator, ±25 ppm stability, -40°C to +85°C, 6-SMD. 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":"LVPECL","Series":"DSC1122","Package":"Tape & Reel (TR); Cut Tape (CT)","Ratings":"-","Function":"Enable/Disable","Frequency":"156.25 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":"DSC1122","Frequency Stability":"±25ppm","Height - Seated (Max)":"0.035\\\" (0.90mm)","Operating Temperature":"-40°C~85°C","Current - Supply (Max)":"58mA","Absolute Pull Range (APR)":"-","Spread Spectrum Bandwidth":"-","Current - Supply (Disable) (Max)":"22mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.9500","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/9eb455e34e1b4ad4aed847bfc84d48fa.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Does the DSC1122CI2-156.2500T have an enable/disable function?","answer":"Yes, the function is Enable/Disable. When disabled, the output enters a high-impedance state and the supply current drops from 58 mA max to 22 mA max. The MEMS oscillator core remains powered; for a full power-down, switch the VCC rail externally."},{"question":"What are the alternatives to the DSC1122CI2-156.2500T?","answer":"Within the same DSC1122 series, other frequency and stability variants are available. For a pin-compatible LVPECL MEMS oscillator at 156.25 MHz, the SiT9121 family from SiTime offers similar specs — confirm the supply voltage range and enable polarity before substituting. No direct second-source from Microchip is listed."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/DSC1122CI2-156.2500T","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/DSC1122CI2-156.2500T 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}}