KSZ8081RNBIA-TR - 10/100 Ethernet PHY | Microchip | 32-QFN
Référence : KSZ8081RNBIA-TR ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $0.6886 | $0,69 |
| 10 | $0 | $0,00 |
| 100 | $0 | $0,00 |
| 500 | $0 | $0,00 |
| 1 000 | $0 | $0,00 |
KSZ8081RNBIA-TR Présentation
An Ethernet physical-layer transceiver, or Ethernet PHY, converts digital data supplied by a media-access controller into electrical signaling suitable for twisted-pair cabling, while receiving and decoding signals returning from the network. The PHY belongs to the Ethernet interface hierarchy: network interface controller, Ethernet transceiver, physical layer, interface IC, and semiconductor. Integrating this function beside a microcontroller, processor, or dedicated MAC reduces board space and the amount of external interface circuitry required.
The KSZ8081 supports 10Base-T and 100Base-TX operation, allowing a single Ethernet connection to negotiate with either 10 Mbps or 100 Mbps network equipment. Its full RMII interface connects the PHY to the digital MAC side of the design. Because RMII timing, voltage levels, clocking, and reset sequencing are design-critical, the host controller and PHY must use compatible timing and a correctly implemented reference circuit.
Typical uses include embedded Ethernet control, industrial networking, communications equipment, USB-to-Ethernet products, set-top boxes, printers, and embedded systems requiring a compact 10/100 network port. CAT-5 UTP is the specified cable medium in the verified manufacturer description; newer cable categories may also support the physical installation, but link capability must be verified in the complete system.
A key design consideration is the relationship between digital RMII signals, the single PHY supply, and the network magnetics or integrated magnetics. The PHY footprint, exposed-pad layout, decoupling, clock source, and Ethernet line-side implementation must follow the manufacturer datasheet exactly. Input voltage limits, absolute maximum ratings, timing values, temperature range, and recommended operating conditions are not present in the supplied verification text and are marked as data needed rather than estimated.
This page combines the verified manufacturer product description with distributor availability, packaging, price references, and application guidance. It also separates confirmed facts from engineering questions that still require review of the manufacturer datasheet, including detailed pin names, electrical limits, and qualification status.
Alternatives de remplacement direct pour KSZ8081RNBIA-TR — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec KSZ8081RNBIA-TR (même facteur de forme et même empreinte) — différant par Package, Product Type.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
KSZ8081RNBIA
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
KSZ8081RNACA-TR
✅ Remplacement direct✓ En stock
$0.77 / unité
Voir la fiche technique →KSZ8081RNB
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
KSZ8081RNACA-TR
✅ Remplacement direct✓ En stock
$0.77 / unité
Voir la fiche technique →KSZ8081MNXIA
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
KSZ8081RNBIA-TR Spécifications
| Product Type | 10Base-T/100Base-TX Ethernet physical-layer transceiver |
| Supported Ethernet Speeds | 10 Mbps and 100 Mbps |
| MAC Interface | Full RMII |
| Supply Architecture | Single-supply |
| Cable Medium | CAT-5 unshielded twisted pair |
| Boîtier | 32-QFN, 5 x 5 mm |
| Type de montage | Surface mount |
| Transceiver Count | 1 transceiver |
| DigiKey Product Classification | Ethernet ICs, 10/100 BASE-TX physical-layer transceiver |
Guide de configuration des broches du KSZ8081RNBIA-TR 32-qfn, 5 x 5 mm
Configuration des broches du KSZ8081RNBIA-TR (boîtier 32-qfn, 5 x 5 mm). La numérotation des broches, les fonctions et les schémas de connexion sont définis dans la fiche technique du fabricant. Consultez-la pour l'empreinte exacte et les directives de soudage.
Aucune donnée de brochage détaillée disponible pour KSZ8081RNBIA-TR.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
KSZ8081RNBIA-TR convient pour 6 applications: Embedded Ethernet Control, Industrial Networking Equipment, USB-to-Ethernet Adapter, Communications Equipment, Set-Top and Media Devices, Printer and Network Peripheral.
Embedded Ethernet Control
The KSZ8081RNBIA-TR fits an embedded controller that already provides an RMII-compatible MAC and needs a separate copper-network interface. Its verified 10Base-T and 100Base-TX support covers the two common Fast Ethernet rates, while full RMII provides the digital handoff to the host controller. Place the PHY near the board edge, route its line-side signals toward the network interface, and keep the 50 MHz-class interface timing concerns under control according to the manufacturer guidance. The verified record does not provide the exact reference-clock mode or supply limits, so those values must be confirmed in the datasheet before schematic release.
Recommandé
Industrial Networking Equipment
KSZ8081RNBIA-TR can provide the Fast Ethernet physical layer in industrial controllers, gateways, and monitoring equipment that connects through CAT-5 UTP. The single-supply architecture and compact 32-QFN 5 x 5 mm footprint help conserve board area compared with discrete transceiver implementations. A production design must still address operating-temperature limits, isolation strategy, grounding, surge protection, magnetics, and enclosure requirements. Those qualifications are not stated in the supplied snippets, so the manufacturer datasheet and product documentation should determine whether the exact ordering code suits the target industrial environment.
Recommandé
USB-to-Ethernet Adapter
The KSZ8081RNBIA-TR is suitable for the network-facing section of a compact USB-to-Ethernet adapter when the host controller can drive a full RMII PHY. Its verified 10/100 capability supports compatibility with both 10 Mbps and 100 Mbps links, while the 32-QFN package limits PCB area. Designers should follow the manufacturer’s RMII timing, decoupling, reset, and clock layouts rather than routing the digital interface as ordinary slow-speed logic. Magnetics selection, isolation requirements, USB connector design, and current cable-length performance also need separate verification for the finished adapter.
Recommandé
Communications Equipment
KSZ8081RNBIA-TR can add a 10/100 copper-network port to communications equipment such as gateways, terminals, and protocol converters. The full RMII interface provides a defined path between the PHY and the digital network controller, while the verified 32-QFN 5 x 5 mm package supports compact designs. Clock sourcing must be selected according to the supported RMII mode, and the MAC must use compatible voltage levels. For equipment intended for long product lifetimes, procurement should also consider lifecycle status, alternate sourcing, and documented traceability rather than relying only on current distributor stock.
Recommandé
Set-Top and Media Devices
The KSZ8081RNBIA-TR can support network connectivity in compact set-top boxes and media devices requiring 10/100 Ethernet rather than gigabit performance. The PHY uses CAT-5 UTP and connects through full RMII, making it suitable where board space is constrained. The system must respect the device’s verified package and interface requirements, including correct treatment of the 32-QFN exposed pad and the placement of high-speed RMII and line-side connections. Exact temperature, power, and clock specifications are unavailable in the supplied data and should be obtained from the authoritative datasheet before production use.
Recommandé
Printer and Network Peripheral
KSZ8081RNBIA-TR is applicable to a printer or other Fast Ethernet peripheral when the main controller includes or can communicate with an RMII-compatible MAC. The PHY’s 10/100 support permits interoperability with older 10 Mbps infrastructure as well as 100 Mbps networks. The design team should verify reference-clock support, reset requirements, line-side magnetics, and all 32 package pins against the manufacturer documentation. Because the provided search data does not establish lead-free, RoHS, REACH, or automotive status, regulated production requirements should be checked separately using current Microchip documentation.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour KSZ8081RNBIA-TR — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | KSZ8081RNBIA | KSZ8081RNA | KSZ8081RNB | KSZ8081RNACA | KSZ8081MNXIA |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 32-QFN 5 x 5 mm | 32-QFN 5 x 5 mm | 32-QFN 5 x 5 mm | 32-QFN 5 x 5 mm | 32-QFN 5 x 5 mm | 32-QFN 5 x 5 mm |
| Ordering Suffix | RNBIA-TR | RNBIA without -TR | RNA | RNB | RNACA | MNXIA |
Principaux différenciateurs
- The target ordering code is explicitly identified as a full-RMII 10/100 Ethernet PHY in a compact 32-QFN package. (vs KSZ8041RNL)
- The -TR ordering code is associated with the tape-and-reel production presentation listed by the distributor search. (vs KSZ8081RNBIA)
- The manufacturer page directly confirms the KSZ8081 family supports CAT-5 UTP and both 10Base-T and 100Base-TX. (vs KSZ8061RNBW)
Notes de conception
Follow the Microchip KSZ8081 reference layout for the 32-QFN footprint, exposed pad, RMII traces, supply connections, and line-side routing. Keep the PHY and decoupling network close to their relevant pins, provide a low-impedance ground return, and avoid unnecessary stubs. Because the supplied data confirms a 32-QFN 5 x 5 mm package but not exact pin functions, do not release PCB artwork until all pins and exposed-pad requirements have been checked against the manufacturer package drawing.
Treat RMII as a timed digital interface rather than a generic control bus. Confirm whether the design requires a transmitted or received clock, establish the supported clock frequency, and use source-synchronous return-path considerations for the data group. Match trace lengths as recommended by the manufacturer and keep clock routing away from Ethernet magnetics and other high-energy switching nodes. The verified text confirms full RMII but does not specify the exact clock mode.
Design the single-supply rail only after checking the datasheet’s operating range, absolute maximum ratings, startup requirements, and decoupling values. Place bulk and high-frequency bypass capacitors at the locations prescribed by the manufacturer, with low-inductance connections to the supply and ground pins. If the board combines the PHY with switching regulators or processors, verify startup margin and ripple tolerance on the Ethernet rail before relying on the nominal single-supply description.
Informations de conformité
The supplied verified snippets do not explicitly state compliance for the exact ordering code. Check current Microchip product, material-declaration, quality, and regulatory documents rather than assuming status from the product family or distributor listing.
