{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MAX3509EUP+","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"MAX3509EUP","canonicalUrl":"https://icboms.com/analog-devices/MAX3509EUP","factsUrl":"https://icboms.com/api/mcp/products/MAX3509EUP%2B","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices MAX3509EUP+, Variable Gain Amplifier, CATV upstream application, 20-TSSOP (0.173\", 4.40mm Width) Exposed Pad, Surface Mount, ROHS3 compliant.","salesMarkdown":"It is the amplifier that boosts the upstream QPSK/QAM signal before it hits the cable plant, and its gain adjustability lets the system compensate for cable loss and temperature variation across the subscriber drop. Packaged in a 20-TSSOP with an exposed pad (20-TSSOP-EP), the part is surface-mount and intended for the dense PCB layouts typical of cable-access equipment. The exposed thermal pad is not optional — it must be soldered to a ground-plane copper island with thermal vias to keep the die temperature within limits under sustained upstream burst transmission. ## Package and thermal — the exposed-pad reality The 20-TSSOP (0.173\", 4.40 mm width) with exposed pad is the only package variant for this part. The exposed pad is the primary heat path; without a proper thermal-land pattern and via array to the ground plane, the junction temperature will rise well above the datasheet limits during the upstream burst duty cycle. The pad is also the ground return for the amplifier — layout should connect it directly to the low-impedance ground plane, not through a thermal-relief spoke that adds inductance. For a CATV infrastructure product with a multi-year service life, that means no forced redesign from a sudden EOL notice.","metaTitle":"MAX3509EUP+ Variable Gain Amplifier, CATV Upstream","metaDescription":"MAX3509EUP+ upstream CATV VGA from Analog Devices. Active lifecycle, ROHS3 compliant, 20-TSSOP exposed pad.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Logic ICs"],"specifications":{"Type":"Variable Gain Amplifier","Package":"Bulk","Applications":"CATV","Mounting Type":"Surface Mount","Package / Case":"20-TSSOP (0.173\\\", 4.40mm Width) Exposed Pad","lifecycle_stage":"eol_hot","Supplier Device Package":"20-TSSOP-EP"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$10.67","stockQuantity":0,"priceTiers":[{"qty":29,"price":"$10.67000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/ac333f329629bb0e4b0ff80bfd8b17be.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the MAX3509EUP+ used for?","answer":"It is a Variable Gain Amplifier designed for CATV upstream applications — the return-path amplifier in cable modems, set-top boxes, and cable-access infrastructure that boosts the subscriber's upstream signal before it reaches the headend."},{"question":"What package does the MAX3509EUP+ come in?","answer":"It is supplied in a 20-TSSOP (0.173\", 4.40 mm width) with an exposed pad, also referred to as 20-TSSOP-EP."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/MAX3509EUP","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/MAX3509EUP 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}}