KSZ8873MLL - 3-Port 10/100 Ethernet Switch | Microchip
部品番号: KSZ8873MLL ✓ 生産中KSZ8873MLL 概要
An Ethernet switch is a semiconductor device that connects multiple physical-layer network ports and manages frame forwarding between them. The KSZ8873 belongs to the Ethernet switch controller hierarchy: three-port managed switch, Ethernet interface IC, network interface, and semiconductor. Compared with discrete Ethernet implementations, its integrated PHYs reduce board area while supporting standardized 10 Mbps and 100 Mbps data rates.
The verified manufacturer information identifies three Ethernet ports, 10/100 Mbps operation, low power consumption, and an MII interface. Available specifications also identify 1.8 V, 2.5 V, and 3.3 V supply operation and a 0°C to +70°C temperature range for KSZ8873MLL. These characteristics make the device relevant to embedded network equipment, industrial controllers, embedded Linux systems, and compact Ethernet access products.
Technically, the KSZ8873 combines three integrated 10/100 network interfaces with switch-management logic. Its 1.8 V to 3.3 V operating range accommodates systems using 1.8 V, 2.5 V, or 3.3 V power rails, while the MII interface provides a standardized connection to a host controller or processor. The manufacturer describes the family as a cost-sensitive, low-port-count solution for power-efficient 10/100 Mbps switch systems.
Typical applications include embedded Linux gateways, industrial Ethernet controllers, printer and copier network interfaces, embedded industrial equipment, and compact network appliances. In each case, the three integrated ports permit local connectivity without requiring three separate external Ethernet PHYs. The MII interface is particularly useful where the system processor already provides Ethernet MAC functionality.
Designers should verify the exact MII signal mapping, clock requirements, crystal options, reference circuit, and thermal conditions against the complete Microchip datasheet before layout release. Because the switch includes magnetic-interface PHY circuitry, its layout guidance for magnetics, termination, power decoupling, and high-speed signal integrity should be followed closely rather than treating the package as a generic low-speed controller.
This page consolidates the verified manufacturer, distributor, and substitution information for KSZ8873MLL, including pricing context, same-family drop-in candidates, comparison parameters, and practical design considerations. The alternatives and notes provide engineering context beyond a basic distributor specification table, while unresolved electrical details are explicitly identified instead of being estimated.
ドロップイン代替品: KSZ8873MLL — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: KSZ8873MLL （同一形状・フットプリント） — 相違点: Package, Product Type, Ethernet Data Rate, Host Interface, Integrated PHY.
KSZ8873FLL
✅ ドロップイン価格はお問い合わせください
データシートを見る →KSZ8873MML
✅ ドロップイン価格はお問い合わせください
データシートを見る →KSZ8873RLL
✅ ドロップイン価格はお問い合わせください
データシートを見る →KSZ8873MLLI
✅ ドロップイン価格はお問い合わせください
データシートを見る →KSZ8873MLL-AM
✅ ドロップイン📋 参考代替品（カタログ未掲載）
KSZ8873MLL 最大定格＆電気的特性
| Product Type | Integrated three-port managed Ethernet switch |
| Number of Ethernet Ports | 3 ports |
| Ethernet Data Rate | 10 Mbps and 100 Mbps |
| Host Interface | MII |
| Integrated PHY | 3 integrated PHYs |
| Supply Voltage Range | 1.8 V, 2.5 V, or 3.3 V |
| 動作温度範囲 | 0°C to +70°C |
| パッケージ | 64-LQFP, 10 mm × 10 mm |
| 実装タイプ | Surface mount |
| Switch Classification | Managed Ethernet switch |
| Power Efficiency | Low-power-consumption design |
| Primary Network Segment | 10/100BASE-T Ethernet |
KSZ8873MLL 64-lqfp, 10 mm × 10 mm ピン配置ガイド
KSZ8873MLL (64-lqfp, 10 mm × 10 mm パッケージ) のピン配置。 ピン番号、機能、接続図はメーカーのデータシートで定義されています。正確なフットプリントとはんだ付けのガイドラインについては、データシートを参照してください。
詳細なピン配置データはありません: KSZ8873MLL.
詳細は データシート をご参照ください。
主な用途
KSZ8873MLL の用途: 6 件s: Embedded Linux Network Gateway, Industrial Ethernet Controller, Networked Printer Controller, Smart Building Edge Device, Automated Test Equipment, Compact Network Appliance.
Embedded Linux Network Gateway
The KSZ8873MLL fits an embedded Linux gateway that needs three local 10/100 Mbps Ethernet connections but has a host processor with an Ethernet MAC rather than three external PHYs. Its MII interface provides the switch-to-controller path, while the three integrated PHYs connect wired network ports. Supporting 1.8 V, 2.5 V, and 3.3 V supplies allows alignment with common embedded processor rails. The compact 10 mm × 10 mm LQFP reduces board-area demand, although designers must preserve the manufacturer’s recommended PHY layout, magnetic-component spacing, and decoupling arrangement for reliable Ethernet performance.
おすすめ
Industrial Ethernet Controller
The KSZ8873MLL can provide a compact three-port 10/100 Mbps network segment for an industrial controller, operator panel, or machine controller. Its managed-switch function and integrated PHYs avoid implementing three separate Ethernet front ends, while the MII interface allows connection to an embedded processor with a compatible MAC. The verified 0°C to +70°C range is suitable for systems maintained within that commercial-temperature envelope. For installations with wider ambient temperatures, the industrial-grade suffix must be evaluated separately, and isolation, surge protection, grounding, and magnetic-interface layout should be designed according to the complete manufacturer guidance.
おすすめ
Networked Printer Controller
A printer, copier, or label-printing controller can use the KSZ8873MLL to consolidate three 10/100 Mbps connections behind an embedded processor. One port may connect to an upstream network while the others serve internal subsystems or service interfaces, reducing the need for separate Ethernet PHY packages. The three-port topology and MII host connection suit compact cost-sensitive electronics, and the 1.8 V to 3.3 V supply choices can simplify power architecture around embedded logic. The implementation must still account for Ethernet magnetics, line-side isolation, termination, controlled clocking, and PCB routing defined in the manufacturer’s reference design.
おすすめ
Smart Building Edge Device
The KSZ8873MLL is appropriate for a smart-building edge device that bridges local wired Ethernet sensors or controllers through an embedded processor. Three integrated 10/100 Mbps PHYs allow a device to expose a local network without requiring three discrete PHY components. The MII interface can connect to a low-power embedded controller, while operation from 1.8 V, 2.5 V, or 3.3 V supports multiple system rails. In deployed building equipment, Ethernet magnetic coupling and isolation must meet the applicable installation requirements, and the controller must manage address tables, frame aging, loop behavior, and traffic prioritization through the supported switch-management interface.
おすすめ
Automated Test Equipment
The KSZ8873MLL can support automated test equipment requiring several 10/100 Mbps service or instrument-network ports around a control processor. Its three-port managed-switch architecture consolidates connections while maintaining a recognizable 10/100 Mbps Ethernet interface for legacy test systems. The MII connection can separate switching functions from the host processor, and the small 64-LQFP package helps preserve instrument front-panel space. Because test equipment may impose stricter channel, isolation, and grounding requirements, the integrator should validate the complete PHY implementation, magnetics, clock source, and line-side filtering rather than treating the IC as a conventional Ethernet jack.
おすすめ
Compact Network Appliance
The KSZ8873MLL suits compact appliances requiring a small, low-port-count Ethernet switch, such as a protocol converter, local control hub, or edge communications module. Three integrated 10/100 Mbps ports provide local connectivity while the MII interface connects to a host processor. Its 1.8 V to 3.3 V operating choices and 10 mm × 10 mm LQFP footprint help reduce both power-supply complexity and board area. Designers should compare the managed-switch feature set with the host firmware’s networking requirements, then follow the reference layout for magnetic components, clock distribution, decoupling, and high-speed trace routing to avoid packet errors or unstable link negotiation.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: KSZ8873MLL — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | KSZ8873FLL | KSZ8873MML | KSZ8873RLL | KSZ8873MLLI |
|---|---|---|---|---|---|
| Package | 64-LQFP (10 mm × 10 mm) | 64-LQFP (10 mm × 10 mm) | 64-LQFP (10 mm × 10 mm) | 64-LQFP (10 mm × 10 mm) | 64-LQFP (10 mm × 10 mm) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Number of Ports | 3 ports | 3 ports | 3 ports | 3 ports | 3 ports |
| Supported Data Rates | 10 Mbps and 100 Mbps | 10 Mbps and 100 Mbps | 10 Mbps and 100 Mbps | 10 Mbps and 100 Mbps | 10 Mbps and 100 Mbps |
| Supply Voltage | 1.8 V, 2.5 V, or 3.3 V | 1.8 V, 2.5 V, or 3.3 V | 1.8 V, 2.5 V, or 3.3 V | 1.8 V, 2.5 V, or 3.3 V | 1.8 V, 2.5 V, or 3.3 V |
| Integrated PHYs | 3 integrated PHYs | 3 integrated PHYs | 3 integrated PHYs | 3 integrated PHYs | 3 integrated PHYs |
| Specialization | Cost-sensitive, power-efficient three-port managed switch | Cost-sensitive, power-efficient three-port managed switch | Cost-sensitive, power-efficient three-port managed switch | Cost-sensitive, power-efficient three-port managed switch | Cost-sensitive, power-efficient three-port managed switch |
主な差別化要因
- Three integrated 10/100 Mbps PHYs in one compact package （vs ENC28J60/ML)
- Explicitly documented drop-in substitution path （vs KSZ8873FLL)
- MII connectivity supports processor-centric Ethernet architectures （vs ENC28J60/ML)
設計ノート
Follow the manufacturer’s Ethernet reference layout rather than routing the three PHY channels as generic digital interfaces. Keep the switch, crystal or clock source, decoupling, and magnetics positioned according to the datasheet reference design, minimize loop area around supply connections, and preserve the recommended clearances around line-side networks. The verified sources identify a 10 mm × 10 mm LQFP package but do not expose the complete routing or spacing values, so those details must be taken directly from the 108-page datasheet.
The KSZ8873MLL supports verified 1.8 V, 2.5 V, and 3.3 V supply options, but the correct regulator and bypass network still depend on the selected operating mode and total board current. Place local high-frequency decoupling directly at the supply and ground pins, use a low-noise source where switch-management accuracy matters, and verify startup sequencing against the host processor. The supplied data does not provide the recommended capacitor values, so those values must not be inferred from generic Ethernet designs.
Do not treat KSZ8873MML, KSZ8873FLL, KSZ8873RLL, KSZ8873MLLI, and KSZ8873MLL-AM as automatically equivalent merely because they share the family name. Confirm the exact pin functions, MII clocking method, supported temperature grade, qualification status, and current supply in the manufacturer’s ordering information. A PCB that relies on suffix-specific functions or clock arrangements should not be converted to another order code without a direct comparison of the relevant datasheet tables.
コンプライアンス情報
The supplied manufacturer and distributor results do not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. These values remain unknown rather than being inferred from the product family.
