{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"KSZ8091RNDIA-TR","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"KSZ8091RNDIA-TR","canonicalUrl":"https://icboms.com/microchip/KSZ8091RNDIA-TR","factsUrl":"https://icboms.com/api/mcp/products/KSZ8091RNDIA-TR","rawCanonicalId":null},"summary":{"shortDescription":"Microchip Technology KSZ8091RNDIA-TR, Ethernet transceiver, full duplex 1/1, 1.8V–3.3V supply, -40°C to 85°C, 24-VFQFN exposed pad, active production.","salesMarkdown":"## What this Ethernet PHY does in the assembly The KSZ8091RNDIA-TR is a single-port Ethernet transceiver (PHY) handling the physical-layer encoding and decoding for 10/100BASE-TX signals. It implements full-duplex operation, meaning the transmit and receive paths run simultaneously on the same twisted pair, doubling the effective data rate over half-duplex links. With one driver and one receiver, it connects a single MAC (Media Access Controller) to the Ethernet cable — typical for an embedded node, industrial sensor, or gateway where only one Ethernet port is needed. ## Supply voltage flexibility and temperature range The PHY accepts a wide supply range of 1.8V, 2.5V, or 3.3V, allowing it to interface directly with low-voltage SoCs (1.8V) or legacy 3.3V MACs without level shifters. This reduces BOM count and simplifies PCB routing. Rated for -40°C to 85°C, it suits industrial environments such as factory-floor Ethernet switches, outdoor surveillance cameras, and automotive cabin telematics — not full MIL-spec, but the common industrial temperature grade. ## Package and mounting considerations Housed in a 24-VFQFN exposed pad (4x4 mm), the package requires a thermal pad on the PCB for heat dissipation. The exposed pad must be soldered to a ground plane to keep junction temperature within limits during continuous 100BASE-TX operation. ## Lifecycle and sourcing posture Microchip lists the KSZ8091RNDIA-TR as Active, meaning no end-of-life notification has been issued. For ongoing builds, this part carries no forced redesign risk. ROHS3 compliant. Sourced per RFQ — confirm current pricing and lead time at quote. No stock-holding claim; availability confirmed at order time.","metaTitle":"KSZ8091RNDIA-TR Ethernet Transceiver – Microchip, Active","metaDescription":"KSZ8091RNDIA-TR: Microchip Ethernet transceiver, full duplex, 1/1 driver/receiver, 1.8V–3.3V supply, -40°C to 85°C, 24-QFN. Active production. Request quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Sensors & Transducers"],"specifications":{"Type":"Transceiver","Duplex":"Full","Package":"Tape & Reel (TR); Cut Tape (CT)","Protocol":"Ethernet","Mounting Type":"Surface Mount","Package / Case":"24-VFQFN Exposed Pad","lifecycle_stage":"eol_hot","Voltage - Supply":"1.8V, 2.5V, 3.3V","Operating Temperature":"-40°C ~ 85°C","Supplier Device Package":"24-QFN (4x4)","Number of Drivers/Receivers":"1/1"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.05","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$2.05000","currency":"USD"},{"qty":25,"price":"$1.86000","currency":"USD"},{"qty":1000,"price":"$1.86000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/0e437a5e659af4e5050ea8639a899e62.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to KSZ8091RNDIA-TR in this Ethernet PHY family?","answer":"Microchip's KSZ8091 family includes several variants with different temperature grades and package options. The KSZ8091RNA (commercial temp, 0°C to 70°C) and KSZ8091RNB (extended temp, -40°C to 85°C) share the same 24-QFN footprint and pinout. Verify the exact supply voltage and temperature grade against your BOM before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/KSZ8091RNDIA-TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/KSZ8091RNDIA-TR when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T20:07:39.422Z","lastPublished":"2026-07-17T20:07:39.422Z","indexable":true}}