{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DSC1502AI3A-156M2500T","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"DSC1502AI3A-156M2500T","canonicalUrl":"https://icboms.com/microchip/DSC1502AI3A-156M2500T","factsUrl":"https://icboms.com/api/mcp/products/DSC1502AI3A-156M2500T","rawCanonicalId":null},"summary":{"shortDescription":"Microchip DSC1502AI3A-156M2500T, DSC150X series, XO (Standard) MEMS oscillator, 156.25 MHz, LVCMOS output, ±20 ppm stability, 2.5 V to 3.3 V supply, -40 to +85 °C, 4-VDFN exposed pad.","salesMarkdown":"## 156.25 MHz MEMS XO – why the silicon resonator matters The DSC1502AI3A-156M2500T is a MEMS-based XO (Standard) that outputs a fixed 156.25 MHz LVCMOS clock — the common reference for 1Gb/10Gb Ethernet PHYs, SerDes framers, and FPGA transceiver banks. Unlike a quartz crystal oscillator, the MEMS resonator is immune to vibration-induced frequency jumps and start-up reliability issues tied to load-capacitance mismatch. Supply voltage spans 2.5 V to 3.3 V, so the same part serves 3.3 V and 2.5 V clock domains without a separate level translator. ## 7.5 mA at 156.25 MHz – power budget fit Maximum supply current is 7.5 mA at 156.25 MHz. For comparison, a quartz-based oscillator at this frequency typically draws 15–25 mA. The MEMS core cuts the clock power budget roughly in half, which matters when the oscillator runs continuously and the system has a tight thermal or battery envelope. This is adequate for most Ethernet and general-purpose clocking; precision timing applications (e.g., IEEE 1588 grandmaster) would require a tighter TCXO or OCXO. Product status is Active per Microchip. The 4-VDFN exposed-pad package (7.0 mm × 5.0 mm, 0.90 mm seated height) is a standard MEMS oscillator footprint.","metaTitle":"DSC1502AI3A-156M2500T MEMS XO – 156.25 MHz, LVCMOS","metaDescription":"Microchip DSC1502AI3A-156M2500T MEMS oscillator: 156.25 MHz, ±20 ppm, LVCMOS, 2.5-3.3 V, -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":"LVCMOS","Series":"DSC150X","Package":"Tape & Reel (TR)","Ratings":"-","Function":"Standby (Power Down)","Frequency":"156.25 MHz","Mounting Type":"Surface Mount","Base Resonator":"MEMS","Package / Case":"4-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":"2.5V ~ 3.3V","Frequency Stability":"±20ppm","Height - Seated (Max)":"0.035\\\" (0.90mm)","Operating Temperature":"-40°C~85°C","Current - Supply (Max)":"7.5mA","Absolute Pull Range (APR)":"-","Spread Spectrum Bandwidth":"-","Current - Supply (Disable) (Max)":"1.8µA (Typ)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/d9dca5041ca10c8cda7b15a6499a28d5.pdf","sourceUrl":null},"ai":{"faq":[{"question":"How does the DSC1502AI3A-156M2500T compare to a standard quartz crystal oscillator?","answer":"The key difference is the MEMS resonator vs a quartz blank. MEMS oscillators have no start-up reliability issues tied to load-capacitance matching, are more resistant to vibration and shock, and typically draw lower supply current — 7.5 mA max at 156.25 MHz vs 15–25 mA for a quartz oscillator at the same frequency. The trade-off is that MEMS oscillators have slightly higher phase noise close to carrier than a good quartz oscillator, though for Ethernet and SerDes clocking the difference is not meaningful."},{"question":"What is the typical power consumption of the DSC1502AI3A-156M2500T?","answer":"In standby (power-down) mode the disable current drops to 1.8 µA typical. Actual power consumption depends on the output load capacitance and the supply voltage — at 3.3 V and a 15 pF load, typical current is lower than the max rating."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/DSC1502AI3A-156M2500T","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/DSC1502AI3A-156M2500T 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}}