{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LMX2531LQ1515E/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LMX2531LQ1515E-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LMX2531LQ1515E-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LMX2531LQ1515E%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LMX2531LQ1515E/NOPB, PLL Frequency Synthesizer (RF), 1.58 GHz max, CMOS output, 2.8V–3.2V supply, -40°C to 85°C, 36-WFQFN Exposed Pad, Surface Mount.","salesMarkdown":"## 1.58 GHz PLL frequency synthesizer for RF local-oscillator chains The Texas Instruments LMX2531LQ1515E/NOPB is a high-performance PLL-based frequency synthesizer designed for RF applications. It accepts a clock input and delivers a CMOS output up to 1.58 GHz, making it a fit for local-oscillator generation in wireless infrastructure, test equipment, and satellite downconverters. The part integrates the PLL function (Yes) in a single 1-circuit device with a 2:2 input-to-output ratio, and operates from a 2.8V to 3.2V supply rail over the industrial temperature range of -40°C to 85°C. ## Supply and temperature — what the ratings mean for the BOM The 2.8V to 3.2V supply window is tighter than a typical 3.3V ±10% rail. If your board runs a 3.3V bus, you need a local LDO or a low-dropout regulator set to 3.0V to stay inside the operating range. The -40°C to 85°C rating covers outdoor telecom cabinets, base-station shelters, and automotive cabin environments — but not under-hood or engine-bay applications, which would require a 125°C-rated part. ## Package and footprint — 36-WQFN with exposed pad Housed in a 36-WFQFN Exposed Pad package (6x6 mm body per the supplier device package designation), this is a surface-mount part that requires a thermal pad on the PCB for heat sinking. The exposed pad must be soldered to a ground plane with adequate via stitching to carry dissipation. ## Lifecycle and sourcing The LMX2531LQ1515E/NOPB carries an Active product status per the manufacturer.","metaTitle":"LMX2531LQ1515E/NOPB PLL Frequency Synthesizer, 1.58 GHz","metaDescription":"Texas Instruments LMX2531LQ1515E/NOPB RF PLL frequency synthesizer, 1.58 GHz max, CMOS output, 2.8V–3.2V supply, -40°C to 85°C, 36-WQFN. Active lifecycle.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"PLL":"Yes","Type":"Frequency Synthesizer (RF)","Input":"Clock","Output":"CMOS","Package":"Bulk","Mounting Type":"Surface Mount","Package / Case":"36-WFQFN Exposed Pad","Frequency - Max":"1.58GHz","lifecycle_stage":"eol_hot","Voltage - Supply":"2.8V ~ 3.2V","Divider/Multiplier":"Yes/No","Number of Circuits":"1","Ratio - Input:Output":"2:2","Operating Temperature":"-40°C ~ 85°C","Supplier Device Package":"36-WQFN (6x6)","Differential - Input:Output":"No/No"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$7.53","stockQuantity":0,"priceTiers":[{"qty":40,"price":"$7.53000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/894547751e7c26bac78cfd4645d0942b.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the frequency range of LMX2531LQ1515E/NOPB?","answer":"The maximum output frequency is 1.58 GHz. The part is a PLL frequency synthesizer with a clock input and CMOS output; the divider/multiplier is Yes/No, so frequency multiplication is not supported internally."},{"question":"Is LMX2531LQ1515E/NOPB compatible with 3.3V logic?","answer":"The supply voltage range is 2.8V to 3.2V. A 3.3V rail exceeds the maximum rating; a regulator to 3.0V is required. The CMOS output is compatible with 3.3V logic families when the supply is within range."},{"question":"What are the alternatives to LMX2531LQ1515E/NOPB?","answer":"The CD74HCT7046AE is a PLL from a different series (74HCT) with a 38 MHz maximum frequency, through-hole package, and -55°C to 125°C range. It is not a functional replacement for a 1.58 GHz RF synthesizer — the LMX2531LQ1515E/NOPB operates in a different performance class and application space."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LMX2531LQ1515E-NOPB","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LMX2531LQ1515E-NOPB when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}