{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"KSZ9021RL","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"KSZ9021RL","canonicalUrl":"https://icboms.com/microchip/KSZ9021RL","factsUrl":"https://icboms.com/api/mcp/products/KSZ9021RL","rawCanonicalId":null},"summary":{"shortDescription":"Microchip Technology KSZ9021RL, Type Transceiver, Full Duplex, Protocol Gigabit Ethernet, 8/8 Drivers/Receivers, 64-LQFP Exposed Pad Package, 3.135V ~ 3.465V Supply, 0°C ~ 70°C Operating Temperature","salesMarkdown":"## Gigabit Ethernet Transceiver with 8/8 Driver/Receiver Channels The KSZ9021RL is a full-duplex Gigabit Ethernet transceiver from Microchip Technology, integrating 8 drivers and 8 receivers in a single 64-LQFP exposed-pad package. This device handles the physical-layer encoding and decoding for 1000BASE-T networks, making it a direct fit for Ethernet switch and router designs that require eight differential signal pairs. Operating from a 3.135V to 3.465V supply, it is compatible with standard 3.3V logic rails and can be powered from a common board voltage without additional regulators. The commercial temperature range of 0°C to 70°C limits deployment to indoor, controlled-environment equipment such as enterprise switches, media converters, and network interface cards. ## Active Lifecycle and Sourcing Reality This is a key signal for BOM planning — no immediate need to qualify a second source or execute a last-time buy. Sourced per RFQ against your BOM quantity. ## Package and Supply Rail Fit The 64-LQFP with exposed pad (10x10 mm body) requires a thermal land on the PCB for adequate heat dissipation. The exposed paddle must be connected to ground plane with multiple vias to keep junction temperature within the datasheet limits during continuous Gigabit Ethernet traffic. Supply decoupling should follow the manufacturer's layout guidelines: place 0.1 µF and 1 µF capacitors close to each supply pin, with the ground return via directly under the pad. The 3.135V to 3.465V range means the part will operate on a 3.3V rail with ±5% tolerance, which covers most regulated supplies.","metaTitle":"KSZ9021RL Gigabit Ethernet Transceiver - Microchip","metaDescription":"KSZ9021RL Gigabit Ethernet transceiver, full-duplex 8/8 drivers/receivers, 64-LQFP EP package, 3.135V-3.465V supply, 0°C to 70°C, Active lifecycle.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Sensors & Transducers"],"specifications":{"Type":"Transceiver","Duplex":"Full","Package":"Tray","Protocol":"Gigabit Ethernet","Mounting Type":"Surface Mount","Package / Case":"64-LQFP Exposed Pad","lifecycle_stage":"eol_hot","Voltage - Supply":"3.135V ~ 3.465V","Operating Temperature":"0°C ~ 70°C","Supplier Device Package":"64-LQFP-EP (10x10)","Number of Drivers/Receivers":"8/8"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$4.79","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$4.79000","currency":"USD"},{"qty":25,"price":"$4.35000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/908d1d03142894cef4ef9230acff896d.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to KSZ9021RL?","answer":"The KSZ9021RN is a known sibling in the same family, sharing the same 64-LQFP EP footprint and 3.3V supply rail. Confirm the exact pinout and feature set against the datasheet before substituting, as register maps or PHY configuration may differ."},{"question":"Can KSZ9021RL be used with a 3.3V supply?","answer":"Yes, the supply voltage range of 3.135V to 3.465V directly covers a standard 3.3V rail. No extra voltage regulator is needed if the rail stays within that tolerance."},{"question":"What type of transceiver is the KSZ9021RL?","answer":"It is a full-duplex Gigabit Ethernet transceiver with 8 drivers and 8 receivers. The 8/8 channel count supports the four differential pairs required for 1000BASE-T (eight signals total)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/KSZ9021RL","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/KSZ9021RL when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T20:07:06.308Z","lastPublished":"2026-07-17T20:07:06.308Z","indexable":true}}