{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LMK61A2-644M53SIAR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LMK61A2-644M53SIAR","canonicalUrl":"https://icboms.com/texas-instruments/LMK61A2-644M53SIAR","factsUrl":"https://icboms.com/api/mcp/products/LMK61A2-644M53SIAR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LMK61A2-644M53SIAR Clock Oscillator, 644.53 MHz, 3.135 V ~ 3.465 V supply, 152 mA, -40°C~85°C, 6-SMD Module, 6-QFM (7x5), Tape & Reel.","salesMarkdown":"The LMK61A2-644M53SIAR: At this frequency it sits in the upper band of what a standard oscillator module can source directly — above the range of most crystal-based XOs — making it a fit for high-speed serial links, FPGA reference clocks, and networking PHY timing where the system needs a clean, single-frequency source without an external PLL. The 152 mA supply current at 3.3 V is the total power draw of the oscillator module itself — budget this into the 3.3 V clock rail alongside any fan-out buffers or clock dividers downstream. At 644.53 MHz, the output edge rate is fast enough that PCB trace impedance and termination matter; the oscillator expects a controlled 50 Ω environment on the output path. It does not carry an automotive-grade qualification (AEC-Q100 is not listed), so it is not specified for under-hood or engine-bay deployment. The 6-QFM package (7 mm × 5 mm) is a compact, surface-mount module with a 6-pin footprint. The supplier device package designation 6-QFM (7x5) matches the 6-SMD Module case code — the same land pattern serves both designators. The module's internal construction integrates the resonator and oscillator circuitry in a single sealed package, eliminating the need for external load capacitors or feedback resistors that a discrete crystal oscillator would require. ## Active lifecycle — current production status The base product number is LMK61A2, which covers the fixed-frequency oscillator family. The suffix 644M53SIAR encodes the frequency (644.53 MHz), the supply voltage option, and the tape-and-reel packaging. If the design requires a different frequency within the LMK61A2 family, the same footprint and supply voltage apply — only the frequency code changes.","metaTitle":"TI LMK61A2-644M53SIAR Clock Oscillator, 644.53 MHz","metaDescription":"Texas Instruments LMK61A2-644M53SIAR clock oscillator, 644.53 MHz, 3.135-3.465 V supply, 152 mA, -40 to 85°C, 6-QFM. Active production, available to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Clock & Timing ICs"],"specifications":{"Mfr":"Texas Instruments","Type":"Clock Oscillator","Count":"-","Series":"-","Package":"Tape & Reel (TR)","Frequency":"644.53MHz","Mounting Type":"Surface Mount","Package / Case":"6-SMD Module","Product Status":"Active","lifecycle_stage":"eol_hot","Current - Supply":"152 mA","Voltage - Supply":"3.135V ~ 3.465V","Base Product Number":"LMK61A2","Operating Temperature":"-40°C~85°C","Supplier Device Package":"6-QFM (7x5)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$7.9860","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/4f79d073177f07fede4fe798bc432227.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LMK61A2-644M53SIAR/alternatives.json"},"ai":{"faq":[{"question":"What package does the LMK61A2-644M53SIAR use?","answer":"It comes in a 6-SMD Module package, specifically a 6-QFM (7x5) — 7 mm × 5 mm footprint, 6 pins. The package is a sealed oscillator module; no external components are needed for the resonator circuit."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LMK61A2-644M53SIAR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LMK61A2-644M53SIAR 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}}