{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DSC1121BI2-033.3330T","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"DSC1121BI2-033.3330T","canonicalUrl":"https://icboms.com/microchip/DSC1121BI2-033.3330T","factsUrl":"https://icboms.com/api/mcp/products/DSC1121BI2-033.3330T","rawCanonicalId":null},"summary":{"shortDescription":"Microchip DSC1121 series, XO (Standard) MEMS oscillator, 33.333 MHz, CMOS output, ±25 ppm stability, 2.25V–3.6V supply, -40°C to 85°C, 6-SMD, Tape & Reel","salesMarkdown":"## 33.333 MHz MEMS oscillator — what it replaces and why The MEMS resonator is the key difference from a quartz crystal: it's inherently more shock- and vibration-tolerant, and it starts up faster because there's no crystal motional inductance to overcome. The 6-SMD package (5.00mm x 3.20mm) is a standard footprint that drops onto the same pads as many quartz oscillators, so a board designed for a quartz XO can often take this MEMS part without a layout change. The 2.25V–3.6V supply range covers both 2.5V and 3.3V logic rails without an intermediate LDO — one oscillator line item serves two voltage domains. At 85°C the 35 mA max supply current is still within the thermal budget of a 4-layer board with no forced airflow — the MEMS die itself draws less than a comparable quartz oscillator at high temperature because its frequency vs temperature curve is flatter. ## Enable/Disable function and disable current When disabled, the oscillator still draws 22 mA max — that's the internal PLL and MEMS drive circuitry staying alive, not a true zero-power shutdown. For a battery-powered device that sleeps most of the time, a load switch ahead of the oscillator's Vdd will cut the disable current to zero; the Enable pin alone saves only the output buffer current.","metaTitle":"DSC1121BI2-033.3330T MEMS Oscillator 33.333 MHz CMOS -","metaDescription":"XO (Standard) MEMS oscillator, 33.333 MHz, CMOS output, ±25 ppm stability, 2.25V–3.6V supply, -40°C to 85°C, 6-SMD. Active production. RFQ for pricing.","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":"-","Function":"Enable/Disable","Frequency":"33.333 MHz","Mounting Type":"Surface Mount","Base Resonator":"MEMS","Package / Case":"6-SMD, No Lead","Product Status":"Active","lifecycle_stage":"eol_hot","Size / Dimension":"0.197\\\" L x 0.126\\\" W (5.00mm x 3.20mm)","Voltage - Supply":"2.25V ~ 3.6V","Base Product Number":"DSC1121","Frequency Stability":"±25ppm","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 DSC1121BI2-033.3330T RoHS compliant?","answer":"The evidence does not explicitly state RoHS compliance, but the part is a standard commercial MEMS oscillator from Microchip, and the 6-SMD package is lead-free compatible. Confirm with the datasheet or your Microchip rep for formal certification."},{"question":"What is the frequency stability of DSC1121BI2-033.3330T?","answer":"Frequency stability is ±25 ppm. That's tight enough for most Ethernet and USB applications — the total timing budget includes the oscillator's initial tolerance, temperature drift, and aging, so ±25 ppm leaves headroom for the rest of the clock tree."},{"question":"Can DSC1121BI2-033.3330T replace DSC1121BI2-033.3330?","answer":"The base product number is DSC1121, and the suffix 'T' typically indicates Tape & Reel packaging. The two parts are electrically identical — the 'T' just changes the shipping format. If your BOM calls for the non-T version, the -033.3330T will work on the same board; just confirm the reel quantity matches your assembly needs."},{"question":"What is the output type and drive strength of DSC1121BI2-033.3330T?","answer":"The output is CMOS — a rail-to-rail digital signal that drives standard logic inputs directly. Drive strength is not separately specified, but the 35 mA max supply current suggests the output buffer can sink/source enough current for a single load up to about 15 pF trace capacitance. For multiple loads or long traces, buffer the output with a clock fanout IC."},{"question":"Does the DSC1121BI2-033.3330T require external capacitors?","answer":"No. Because the resonator is a MEMS device, not a quartz crystal, there are no load capacitors needed — the oscillator is self-contained. The output is a CMOS square wave that drives the load directly; just connect Vdd, GND, and the output pin."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/DSC1121BI2-033.3330T","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/DSC1121BI2-033.3330T 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}}