{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LMX2531LQ1570E/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LMX2531LQ1570E-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LMX2531LQ1570E-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LMX2531LQ1570E%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LMX2531LQ1570E/NOPB, PLL frequency synthesizer (RF) with integrated VCO, 1.636 GHz max frequency, CMOS output, 2.8V–3.2V supply, 36-WQFN (6x6 mm) exposed-pad package, -40°C to 85°C.","salesMarkdown":"## 1.636 GHz PLL with integrated VCO — what the frequency rating means for the LO chain The Texas Instruments LMX2531LQ1570E/NOPB is a PLL-based frequency synthesizer (RF) that integrates the VCO and loop filter components into a single 36-WQFN package. It accepts a clock input and delivers a CMOS output up to 1.636 GHz, making it a direct fit for local-oscillator generation in wireless infrastructure, microwave backhaul, and test equipment where a clean, programmable RF carrier is needed without an external VCO module. ## Supply and temperature — sizing the rail and the environment The supply range is 2.8V to 3.2V, a tighter window than a generic 3.3V rail — the designer should plan a dedicated low-noise LDO or regulator to keep the synthesizer's phase noise clean, especially when the 1.636 GHz output is used as a reference for a mixer or upconverter. The operating temperature range of -40°C to 85°C covers outdoor telecom cabinets, base-station shelters, and industrial RF test racks; the industrial grade means no derating concerns for equipment that sees seasonal thermal cycling. ## Package and layout — the exposed pad is part of the RF ground Housed in a 36-WFQFN with an exposed pad (supplier device package 36-WQFN 6x6 mm), the thermal pad must be soldered to a ground plane with a via array for both heat dissipation and low-inductance RF return. The 2:2 input-to-output ratio means two clock inputs and two CMOS outputs are available, useful for fan-out or redundant reference distribution on the board. ## Lifecycle and sourcing — active production, no LTB risk The LMX2531LQ1570E/NOPB carries an active lifecycle status and is ROHS3 compliant. The NOPB suffix confirms lead-free / RoHS3 compliance, matching the majority of modern assembly lines.","metaTitle":"LMX2531LQ1570E/NOPB PLL Frequency Synthesizer, 1.636 GHz","metaDescription":"TI LMX2531LQ1570E/NOPB PLL frequency synthesizer with integrated VCO, 1.636 GHz max output, CMOS output, 36-WQFN package, -40°C to 85°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Clock & Timing ICs"],"specifications":{"PLL":"Yes","Type":"Frequency Synthesizer (RF)","Input":"Clock","Output":"CMOS","Package":"Tape & Reel (TR); Cut Tape (CT)","Mounting Type":"Surface Mount","Package / Case":"36-WFQFN Exposed Pad","Frequency - Max":"1.636GHz","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":"$11.31","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$11.31000","currency":"USD"},{"qty":10,"price":"$10.39700","currency":"USD"},{"qty":25,"price":"$9.96600","currency":"USD"},{"qty":100,"price":"$8.78070","currency":"USD"},{"qty":250,"price":"$8.34972","currency":"USD"},{"qty":500,"price":"$7.81104","currency":"USD"},{"qty":1250,"price":"$7.62300","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/fdd610e3e34ac7c680218100a27ac57e.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the frequency range of LMX2531LQ1570E/NOPB?","answer":"The maximum output frequency is 1.636 GHz. The part is a PLL frequency synthesizer with an integrated VCO, so the lower end of the range is determined by the VCO tuning range and the divider settings — the datasheet covers the full operating band."},{"question":"Is LMX2531LQ1570E/NOPB RoHS compliant?","answer":"Yes, it is ROHS3 compliant, as indicated by the NOPB suffix in the ordering code."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LMX2531LQ1570E-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/LMX2531LQ1570E-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}}