KSZ8051MLL - 100Mbps MII Ethernet PHY | Microchip Technology
Référence : KSZ8051MLL ✓ ActifKSZ8051MLL Présentation
An Ethernet physical-layer transceiver, or PHY, converts logical data transmitted by a MAC or controller into signals suitable for copper Ethernet wiring and converts received cable signals back into digital data. The KSZ8051MLL belongs to the 10/100 Ethernet PHY category, within interface ICs and the broader Ethernet communications hierarchy. Its full MII interface provides parallel control, data, and status connections to a network controller.
The principal operating characteristics are a 100 Mbps maximum data rate, one transmitter and one receiver, and a 3.3 V supply. Manufacturer information identifies support for 1.8 V, 2.5 V, and 3.3 V interface operating levels, depending on the configuration and connected controller. The commercial-temperature version operates from 0°C to +70°C and is supplied in a surface-mount 48-LQFP package.
The integrated PHY reduces the amount of external circuitry required for a 10/100 Ethernet endpoint. It handles physical signaling to the network medium while the associated controller manages packet processing and the higher-level protocol stack. Full MII support makes it appropriate for designs that require a conventional parallel Ethernet interface rather than a serial reduced-media interface.
Typical applications include industrial Ethernet equipment, embedded network controllers, print servers, IP cameras, building-control gateways, and compact communication modules. The 100 Mbps rate supports Fast Ethernet networks, while MII connectivity allows direct integration with controllers such as LAN9353T/PT and related Ethernet interface devices.
PCB implementation requires careful separation between the digital MII signals and the analog magnetics interface. Place network-side filtering and magnetics close to the connector, observe the recommended copper and layout practices in the manufacturer datasheet, and keep high-current and high-speed return paths controlled to reduce radiated emissions and susceptibility to external noise.
This page combines the manufacturer product information, interface characteristics, package details, drop-in candidates, and practical Ethernet design guidance. It is intended to help engineers verify mechanical compatibility, MII requirements, supply conditions, and thermal constraints before integrating the KSZ8051MLL into a Fast Ethernet design.
Alternatives de remplacement direct pour KSZ8051MLL — 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 KSZ8051MLL (même facteur de forme et même empreinte) — différant par Package, Product Type.
KSZ8051MLLI
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
KSZ8041MLLI
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
KSZ8001L
✅ Remplacement directContactez-nous pour le prix
Voir la fiche technique →KSZ8001LIA3
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
KSZ8051MLL Spécifications
| Product Type | 10Base-T/100Base-TX Ethernet PHY transceiver |
| Maximum Data Rate | 100 Mbps |
| Host Interface | Full MII |
| Number of Transmitters | 1 |
| Number of Receivers | 1 |
| Nominal Supply Voltage | 3.3 V |
| Supply Voltage Range | 3.135 V to 3.465 V |
| Supported Interface Voltage Levels | 1.8 V, 2.5 V, and 3.3 V |
| Plage de température de fonctionnement | 0°C to +70°C |
| Boîtier | 48-LQFP (7 x 7 mm) |
| Type de montage | Surface mount |
| Network Standard | 10Base-T/100Base-TX |
| Supported Cable | Category 5 unshielded twisted pair |
| Automotive Qualification | AEC-Q100 standard qualified in the KSZ8051 family |
| Statut du cycle de vie | Active |
Guide de configuration des broches du KSZ8051MLL 48-lqfp (7 x 7 mm)
Configuration des broches du KSZ8051MLL (boîtier 48-lqfp (7 x 7 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 KSZ8051MLL.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
KSZ8051MLL convient pour 6 applications: Industrial Ethernet Gateways, Embedded Fast Ethernet Controllers, IP Cameras and Video Edge Devices, Building-Control Gateways, Printers and Office Peripherals, Communication and Test Equipment.
Industrial Ethernet Gateways
The KSZ8051MLL fits industrial gateways that need a 100 Mbps 10/100 Ethernet physical layer while retaining a full MII connection to the system controller. Its one-transmitter, one-receiver architecture and nominal 3.3 V supply simplify the network-side circuit, while the 48-LQFP package supports compact controller boards. The specified 0°C to +70°C range suits controlled indoor equipment, although enclosure temperature must be checked. For factory gateways, maintain separation between the digital MII section and the analog network magnetics, and follow the recommended high-impedance return and isolation layout in the manufacturer datasheet.
Recommandé
Embedded Fast Ethernet Controllers
The KSZ8051MLL is appropriate for embedded controller platforms that use a parallel MII interface and require a dedicated 10/100 Ethernet PHY. It supports 100 Mbps and 10 Mbps traffic over Category 5 unshielded twisted-pair cable, allowing controller firmware to use an established Ethernet MAC rather than integrating PHY functions in the host device. The 3.135 V to 3.465 V supply range centers on the nominal 3.3 V rail. Designers should verify the connected controller's MII voltage levels against the 1.8 V, 2.5 V, and 3.3 V options before finalizing the bank voltage and level-shifting strategy.
Recommandé
IP Cameras and Video Edge Devices
The KSZ8051MLL can provide the wired network connection in an IP camera or compact video edge device that streams data over a 100 Mbps Ethernet link. The PHY's single transmitter and single receiver arrangement supplies the physical layer without replacing the controller's packet-processing function. Category 5 UTP support covers standard structured cabling used in buildings and industrial facilities. Design the magnetics interface and connector path with short, controlled traces, and confirm that camera startup and image-transfer traffic remain compatible with the 10Base-T fallback needed during network negotiation.
Recommandé
Building-Control Gateways
The KSZ8051MLL is suitable for building-control gateways, room controllers, and energy-management interfaces that connect supervisory systems to 10/100 Ethernet networks. Full MII support allows direct integration with a network controller, while the 100 Mbps capability handles routine telemetry, configuration traffic, and local diagnostic data. The 48-LQFP 7 x 7 mm package is useful where the gateway PCB must remain compact. Because the listed version is specified for 0°C to +70°C, installations near boilers, outdoor enclosures, or unheated cabinets should verify ambient temperature or select a wider-temperature option after reviewing the ordering table.
Recommandé
Printers and Office Peripherals
The KSZ8051MLL supports the 100 Mbps Ethernet connection used by network printers, scanners, and multifunction office peripherals. Its MII interface lets a dedicated controller handle packet traffic while the PHY manages signaling to standard twisted-pair Ethernet. The device can also negotiate the 10Base-T mode required for compatibility with slower links. Layout quality is especially important because printer chassis may combine switching power supplies, motors, and high-current peripherals. Keep the Ethernet magnetics interface away from noisy power stages and use the manufacturer's recommended component placement and ground strategy to limit emissions and improve immunity.
Recommandé
Communication and Test Equipment
The KSZ8051MLL can serve as the network interface in compact communication analyzers, protocol testers, and industrial diagnostic equipment. A 100 Mbps PHY with full MII gives the internal controller access to real-time link testing while remaining compatible with common 10/100 Ethernet infrastructure. The single transceiver arrangement is sufficient for one network port and avoids unnecessary channel switching. For bench equipment, provide the supply filtering and layout separation recommended for the analog network section, and verify that enclosure temperature and conducted emissions remain compatible with the commercial-temperature version.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour KSZ8051MLL — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | KSZ8051MLLI | KSZ8041MLLI | KSZ8001L | KSZ8001LIA3 |
|---|---|---|---|---|---|
| Package | 48-LQFP (7 x 7 mm) | 48-LQFP (7 x 7 mm) | 48-LQFP (7 x 7 mm) | 48-LQFP (7 x 7 mm) | 48-LQFP (7 x 7 mm) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Ethernet Standard | 10Base-T/100Base-TX | 10Base-T/100Base-TX | 10Base-T/100Base-TX | 10Base-T/100Base-TX | 10Base-T/100Base-TX |
Principaux différenciateurs
- Full MII host connectivity (vs KSZ8041MLLI)
- Defined 100 Mbps operating class (vs KSZ8001L)
- Automotive-capable family platform (vs KSZ8001LIA3)
Notes de conception
Separate the digital MII section from the analog network-facing section. Route MII signals over continuous reference planes, keep the magnetics and its supporting components near the RJ45 connector, and minimize the area of high-impedance copper around the PHY. Follow the exact component placement and network-side circuit shown in the manufacturer datasheet; changing magnetics or filtering arrangements can alter return loss, common-mode performance, and emissions.
Design the 3.3 V supply to remain within the specified 3.135 V to 3.465 V range under startup, load, and temperature conditions. Place the device's recommended bypass capacitors close to their associated supply pins and provide an uninterrupted ground return from the exposed thermal pad to the board ground plane. Confirm the exposed-pad connection and layout in the package drawing before fabrication.
Do not treat two 48-LQFP Ethernet PHYs as interchangeable solely because their package drawings look alike. Compare pin numbers, MII signal directions, reset behavior, strap options, register addresses, supply sequencing, and magnetics recommendations. After any substitution, run link negotiation at both 100 Mbps and 10 Mbps and verify error-free transfer under the intended cable length and environmental conditions.
Use the manufacturer-specified Ethernet magnetics, common-mode filtering, and termination arrangement to maintain signal quality across the cable interface. MII timing depends on a clean 3.3 V digital environment, so isolate the MII clock and data nets from switching-node edges. Avoid adding long test pads or stubs on sensitive nets because they can increase edge degradation and susceptibility to reflected noise.
Informations de conformité
Microchip identifies the KSZ8051 family as AEC-Q100 standard qualified for automotive applications. Exact RoHS, REACH, lead-free, halogen-free, and conflict-minerals status for the KSZ8051MLL ordering code require confirmation from the manufacturer product documentation.
