{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ASEMB-33.330MHZ-LR","brand":"Abracon LLC","brandSlug":"abracon-llc","productSlug":"ASEMB-33.330MHZ-LR","canonicalUrl":"https://icboms.com/abracon-llc/ASEMB-33.330MHZ-LR","factsUrl":"https://icboms.com/api/mcp/products/ASEMB-33.330MHZ-LR","rawCanonicalId":null},"summary":{"shortDescription":"Abracon LLC ASEMB Pure Silicon™ XO oscillator, 33.33 MHz, CMOS output, 1.8–3.3 V, ±25ppm, MEMS resonator, 4-SMD 3.20×2.50mm, standby function, -40°C~85°C.","salesMarkdown":"## What the MEMS resonator changes for your clock tree The ASEMB-33.330MHZ-LR is a CMOS-output XO (Standard) using a MEMS resonator rather than an AT-cut crystal — the base resonator entry lists MEMS as the source. This shifts the shock and vibration profile decisively: MEMS resonators have no piezoceramic fracture risk and maintain frequency under mechanical stress that would stress-grain a crystal. For portable or industrial equipment where the board sees >50 g shock, the MEMS base is the primary selection driver, not a footnote. The tradeoff is that MEMS oscillators typically carry slightly higher phase noise floor than high-Q crystal XOs at offsets beyond 1 MHz — if the 33.33 MHz clock feeds a PLL or clock cleaner, verify the phase-noise mask against the MEMS plot before committing the BOM line. ## 33.33 MHz and the supply rails — what fits this clock The 33.33 MHz frequency is a non-trivial clock choice — 33.333... MHz is the 5th submultiple of the 166.666... MHz USB High-Speed reference, and it also appears as a divide-down target in Ethernet PHY clock trees and some CAN FD designs. The ±25ppm frequency stability meets Ethernet 100BASE-TX tolerance (±50 ppm total) and satisfies most UART and sensor bus clock requirements without a trim register. ## Standby pin and the power budget The standby (power-down) function is the key power-management feature on this part. When asserted, the oscillator draws ≤15 µA maximum, compared to 16 mA maximum in normal operation — roughly a 1000× reduction. A battery-powered node that needs the clock only during active sampling or burst transmission can gate the ASEMB rather than letting a continuously-running crystal oscillator burn 16 mA between events. The 15 µA disable figure is the floor to design against; the actual current in a powered-off state is what the downstream logic sees as load, so verify the upstream rail can tolerate that residual draw if the supply stays energized during standby. ## Footprint and the 3.2 × 2.5 mm package for dense layouts The ultra-low profile makes it viable under daughtercards or alongside tall connectors; the no-lead frame calls out a thermal pad land pattern — confirm the layout uses the manufacturer-recommended landing pad and solder mask opening, because MEMS oscillator paste reflow profiles are more sensitive to voiding than standard crystal packages. Standard surface-mount pick-and-place handling applies — no special co-planarity concerns with this package style.","metaTitle":"Abracon ASEMB-33.330MHZ-LR XO","metaDescription":"Abracon ASEMB-33.330MHZ-LR: MEMS-based XO oscillator, CMOS output, 33.33 MHz, ±25ppm stability, 1.8–3.3 V supply, -40°C to 85°C, standby function.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Crystals & Oscillators"],"specifications":{"Mfr":"Abracon LLC","Type":"XO (Standard)","Output":"CMOS","Series":"ASEMB, Pure Silicon™","Package":"Tape & Reel (TR)","Ratings":"-","Function":"Standby (Power Down)","Frequency":"33.33 MHz","Mounting Type":"Surface Mount","Base Resonator":"MEMS","Package / Case":"4-SMD, No Lead","Product Status":"Active","lifecycle_stage":"unknown","Size / Dimension":"0.126\\\" L x 0.098\\\" W (3.20mm x 2.50mm)","Voltage - Supply":"1.8V ~ 3.3V","Frequency Stability":"±25ppm","Height - Seated (Max)":"0.035\\\" (0.90mm)","Operating Temperature":"-40°C~85°C","Current - Supply (Max)":"16mA","Absolute Pull Range (APR)":"-","Current - Supply (Disable) (Max)":"15µA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/da42cc497332e05d18ecc76e65f6b660.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/ASEMB-33.330MHZ-LR/alternatives.json"},"ai":{"faq":[{"question":"What is the ASEMB-33.330MHZ-LR used for in a typical design?","answer":"The 33.33 MHz output typically serves as a reference clock for USB High-Speed PHY divide-down paths, Ethernet PHY subsystems, or CAN FD controllers — anywhere a sub-50 ppm clock at CMOS levels fits the rail. The standby function makes it equally viable for battery-scheduled nodes where the clock is gated between measurement or transmission bursts."},{"question":"Does the ASEMB-33.330MHZ-LR require any external support components beyond supply decoupling?","answer":"No additional external components are listed as required — the oscillator is a self-contained clock source. Standard practice is a 100 nF bypass cap as close as possible to the supply pins, and keeping the output trace short enough that the CMOS edge does not couple into adjacent high-impedance nodes. The 1.8–3.3 V supply range is single-rail; no negative bias or dual-rail staging is needed."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/abracon-llc/ASEMB-33.330MHZ-LR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/abracon-llc/ASEMB-33.330MHZ-LR 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}}