{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DSC1122CI1-155.5200T","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"DSC1122CI1-155.5200T","canonicalUrl":"https://icboms.com/microchip/DSC1122CI1-155.5200T","factsUrl":"https://icboms.com/api/mcp/products/DSC1122CI1-155.5200T","rawCanonicalId":null},"summary":{"shortDescription":"Microchip DSC1122 series MEMS XO, 155.52 MHz LVPECL output, ±50 ppm stability, 2.25–3.6 V supply, -40 to 85°C, 6-SMD no-lead package.","salesMarkdown":"The DSC1122CI1-155.5200T is a MEMS-based XO (standard oscillator) from Microchip, delivering a 155.52 MHz LVPECL output with ±50 ppm frequency stability. That frequency is a standard telecom rate — 155.52 MHz is the line rate for OC-3/STM-1 optical transport and the reference for many 10/25 GbE SerDes PLLs. The LVPECL output provides a differential, low-jitter clock with typical sub-1 ps phase noise, which keeps the signal eye open across backplane traces and high-speed connectors. For a board that sees vibration in a fan tray or a portable instrument, the MEMS construction is a reliability upgrade — no crystal to crack or detune. The supply voltage spans 2.25 V to 3.6 V, covering both 2.5 V and 3.3 V rails without an external regulator. At 3.3 V the oscillator draws 58 mA max (supply current), which is typical for a 155 MHz LVPECL driver — the differential output pair is always on, so the current is load-independent. It suits outdoor telecom cabinets, base stations, and industrial controllers that see seasonal thermal swings. The ±50 ppm stability holds across that range — no frequency drift compensation needed in the downstream PLL. ## Package and footprint – 6-SMD no-lead, 3.2 × 2.5 mm The 6-SMD no-lead package measures 3.20 mm × 2.50 mm with a seated height of 0.90 mm. That is a compact footprint for a high-frequency oscillator — it fits under a mezzanine card or next to a SerDes transceiver without crowding the routing channel. The no-lead (LCC) style has flat contacts on the bottom; rework is straightforward with a hot-air station if the pad layout has a thermal relief to the ground plane.","metaTitle":"DSC1122CI1-155.5200T MEMS Oscillator – 155.52 MHz LVPECL","metaDescription":"Microchip DSC1122CI1-155.5200T: MEMS XO, 155.52 MHz LVPECL output, ±50 ppm stability, -40 to 85°C, 6-SMD. 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":"LVPECL","Series":"DSC1122","Package":"Tape & Reel (TR)","Ratings":"-","Function":"Enable/Disable","Frequency":"155.52 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":"±50ppm","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":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/9eb455e34e1b4ad4aed847bfc84d48fa.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the output type of DSC1122CI1-155.5200T?","answer":"LVPECL (Low-Voltage Positive Emitter-Coupled Logic) — a differential, 3.3 V / 2.5 V compatible output standard. It requires 50-ohm termination to VCC – 2 V, typical for driving a SerDes reference clock or a clock fanout buffer."},{"question":"Is DSC1122CI1-155.5200T compatible with a 3.3 V supply?","answer":"Yes. The supply range is 2.25 V to 3.6 V, so 3.3 V is within spec. At 3.3 V the maximum supply current is 58 mA."},{"question":"Does DSC1122CI1-155.5200T have a pin-compatible alternative?","answer":"No pin-compatible alternative is listed by Microchip. The DSC1122 series is the only MEMS LVPECL oscillator in this 6-SMD footprint at 155.52 MHz. If you need a quartz-based LVPECL XO, the footprint and pinout differ — a board spin would be required."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/DSC1122CI1-155.5200T","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/DSC1122CI1-155.5200T 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}}