{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DS1878T+T","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"DS1878TT","canonicalUrl":"https://icboms.com/analog-devices/DS1878TT","factsUrl":"https://icboms.com/api/mcp/products/DS1878T%2BT","rawCanonicalId":null},"summary":{"shortDescription":"Maxim Integrated DS1878T+T SFP+ Controller, Input Type Analog/Digital, Output Type Digital, 2.5 mA Supply, -40°C to 95°C, 28-WFQFN Exposed Pad, Surface Mount, 28-TQFN (5x5).","salesMarkdown":"## SFP+ controller with integrated digital LDD RX — what it is and where it fits The Maxim Integrated DS1878T+T is an SFP+ controller IC that integrates a digital laser-diode driver receiver path — the description calls it out as a controller with digital LDD RX. It accepts both analog and digital inputs and produces a digital output, making it the control and monitoring hub inside an SFP+ transceiver module or on the line card that hosts one. The part draws 2.5 mA from the supply rail, a figure that matters when you're budgeting the module's total power envelope against the SFP+ MSA limit. Every milliamp counts when you're trying to keep the case temperature under the 95°C ceiling. ## 28-TQFN (5x5) — the footprint that decides the rework plan The DS1878T+T comes in a 28-TQFN package measuring 5x5 mm, with an exposed pad underneath. That exposed pad is the primary thermal path — the scorch mark on a dead board often traces back to a lifted pad or a void under the die attach. If you're reworking one, the hot-air profile needs enough bottom-side preheat to get the solder under that pad flowing before you touch the perimeter pins. ## Active lifecycle — no LTB clock ticking The DS1878T+T carries an Active product status and is ROHS3 compliant. That means no last-time-buy deadline to chase, no scramble for the surplus channel. You can qualify it into a new BOM today and expect it to be there for the next several years of production. ## Temperature range — -40°C to 95°C covers the industrial floor Rated for -40°C to 95°C operating temperature, this controller suits outdoor telecom cabinets, factory-floor SFP cages, and any environment where the module sees ambient heat from adjacent line cards. The 95°C upper limit is the module case temperature, not the ambient — the derating curve in the datasheet governs how much current you can actually pull at the top end.","metaTitle":"DS1878T+T SFP+ Controller, 2.5 mA, 28-TQFN","metaDescription":"Maxim Integrated DS1878T+T SFP+ Controller with digital LDD RX. Active, -40°C to 95°C, 2.5 mA supply, 28-TQFN.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["DC-DC Power Modules"],"specifications":{"Type":"SFP+ Controller","Package":"Tape & Reel (TR); Cut Tape (CT)","Input Type":"Analog, Digital","Output Type":"Digital","Mounting Type":"Surface Mount","Package / Case":"28-WFQFN Exposed Pad","lifecycle_stage":"eol_hot","Current - Supply":"2.5 mA","Operating Temperature":"-40°C ~ 95°C","Supplier Device Package":"28-TQFN (5x5)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$5.06","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$5.06000","currency":"USD"},{"qty":10,"price":"$4.54300","currency":"USD"},{"qty":25,"price":"$4.29520","currency":"USD"},{"qty":100,"price":"$3.72240","currency":"USD"},{"qty":250,"price":"$3.53148","currency":"USD"},{"qty":500,"price":"$3.16878","currency":"USD"},{"qty":1000,"price":"$2.67246","currency":"USD"},{"qty":2500,"price":"$2.53884","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/82d0197ce5d5b4ebbc1c36422933fe64.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Does DS1878T+T have a direct equivalent or replacement?","answer":"No direct equivalent or replacement is listed in the available records. The DS1878T+T is an active part with no announced successor or second-source cross-reference. If you need a pin-compatible alternate, the best path is to review the Maxim SFP+ controller family for other density options — but no drop-in substitute is documented here."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/DS1878TT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/DS1878TT 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}}