KSZ8895MQXC - 5-Port 10/100 Managed Ethernet Switch | Microchip
MPN： KSZ8895MQXC ✓ 啟用中KSZ8895MQXC 概覽
A managed Ethernet switch is a semiconductor that connects multiple Ethernet endpoints through an internal Layer 2 forwarding engine. The KSZ8895MQXC occupies the managed switch and Ethernet interface IC category, combining copper Ethernet PHYs with configurable traffic management. This integration reduces the number of discrete network components required in industrial, automotive, communications, and embedded equipment while supporting centralized configuration over I2C or SPI.
Key features include five 10/100 Mb/s Ethernet ports, MII and RMII connectivity, and a Layer 2 managed switch architecture. According to the Microchip product page, the KSZ8895 family is automotive qualified and designed to reduce system cost. The MQX ordering variant supports managed switch operation with MII and RMII interfaces, while the family also includes variants offering related clock-output or fiber-oriented connectivity options.
The KSZ8895 integrates five 10/100BASE-TX transceivers with a Layer 2 switch fabric, allowing each port to connect to an Ethernet PHY, magnetics-based network interface, or other suitable 10/100BASE-T endpoint. Its MII interface supports parallel host connectivity, while RMII reduces the number of host-side signal lines by using a reduced pin interface. Management access through I2C and SPI supports configuration of operating parameters without requiring discrete configuration storage for basic switch functions.
Typical applications include automotive Ethernet gateways, industrial Ethernet controllers, embedded communications equipment, network interface cards, and terminal systems requiring several Fast Ethernet ports in one device. The 128-pin PQFP package provides adequate routing space for five integrated PHYs, the switch core, management interfaces, clocking, power, and ground connections. A new board design should follow the KSZ8895MQX Hardware Design Checklist for termination, layout, and interface guidance.
Layout and signal-integrity discipline are critical because five integrated PHYs place multiple high-speed differential and digital signals on one PCB. Place the device in accordance with the manufacturer hardware checklist, provide the required local bypass capacitors, route Ethernet differential pairs as controlled-impedance nets, and keep switching and clock sources away from sensitive analog and magnetics interfaces.
This product page brings together the verified manufacturer product description, family datasheet, hardware design checklist, lifecycle-oriented family information, package details, and application guidance. It also distinguishes directly related family variants while preserving the important engineering distinction between a qualified drop-in substitute and a device with different interface or clock behavior.
直接替換替代品，適用於 KSZ8895MQXC — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： KSZ8895MQXC （相同外形與佔位） — 差異在於 Package.
KSZ8895MQI
✅ 直接替換聯絡詢價
查看資料表 →KSZ8895FMQI
✅ 直接替換📋 參考替代品（不在目錄中）
KSZ8895RQXI
✅ 直接替換聯絡詢價
查看資料表 →KSZ8895FQXI
✅ 直接替換聯絡詢價
查看資料表 →KSZ8895MLXI
✅ 直接替換📋 參考替代品（不在目錄中）
KSZ8895MQXC 最大額定值與電氣特性
| Product Type | Layer 2 managed Ethernet switch |
| Number of Ethernet Ports | 5 ports |
| Supported Ethernet Data Rates | 10 Mb/s and 100 Mb/s |
| Ethernet Standards | 10/100 Base-T/TX |
| Host Interface | MII and RMII |
| Management Interface | I2C and SPI |
| 封裝 | 128-pin PQFP, 14 x 20 mm |
| 安裝類型 | Surface mount |
| Automotive Qualification | Automotive qualified |
| Switching Architecture | Layer 2 managed switch |
| Integrated Transceivers | 5 integrated 10/100 Ethernet transceivers |
| Maximum Data Rate Per Port | 100 Mb/s |
| RoHS 狀態 | Compliant |
KSZ8895MQXC 128-pin pqfp, 14 x 20 mm 腳位配置指南
KSZ8895MQXC（128-pin pqfp, 14 x 20 mm 封裝）的腳位配置。 腳位編號、功能與連接圖定義於製造商資料手冊中。請參閱該手冊以取得確切的封裝尺寸與焊接指引。
無詳細腳位定義資料： KSZ8895MQXC.
請參閱 資料表 以查看完整腳位配置。
典型應用
KSZ8895MQXC 適用於 6 應用s: Automotive Ethernet Gateway, Industrial Ethernet Controller, Embedded Network Interface Card, Communications Equipment, Network Security Appliance, Test and Measurement System.
Automotive Ethernet Gateway
The KSZ8895MQXC fits an automotive Ethernet gateway that must connect several 10/100 Mb/s nodes while presenting a controlled interface to a vehicle domain controller or switch processor. Its five integrated Fast Ethernet PHYs reduce the need for separate Ethernet components, and the automotive-qualified family is intended to support cost-conscious vehicle networking. MII or RMII can be selected according to processor bandwidth and pin budget, while I2C or SPI provides configuration access for port parameters and system supervision. The main engineering constraint is thermal and signal-integrity planning across the relatively large 14 x 20 mm PQFP device and five routed copper interfaces.
推薦
Industrial Ethernet Controller
The KSZ8895MQXC is suitable for an industrial controller requiring five integrated 10/100BASE-T/TX ports, managed Layer 2 forwarding, and a processor-facing host interface. The switch can connect sensors, programmable-logic controllers, service equipment, and plant network segments without requiring five external PHY devices. MII provides a familiar parallel interface, while RMII can reduce host pin count when the connected controller supports it. I2C and SPI management connectivity supports configuration and diagnostics. Industrial designs should confirm the exact temperature grade, implement the manufacturer termination recommendations, and preserve controlled-impedance routing for all differential Ethernet pairs.
推薦
Embedded Network Interface Card
The KSZ8895MQXC can serve as the central switching component of an embedded network interface card with five 10/100 Mb/s external ports and one processor-facing MII or RMII connection. The integrated managed switch architecture consolidates multiple PHY functions into one device, supporting a compact implementation for edge servers, test systems, and communication equipment. I2C or SPI management allows a supervisory processor to initialize the network and respond to operational events. Designers should use the KSZ8895MQX Hardware Design Checklist to implement magnetics, termination, bypass capacitance, and clock routing according to the manufacturer's recommended topology.
推薦
Communications Equipment
The KSZ8895MQXC is appropriate for communications equipment that aggregates several Fast Ethernet links, such as a protocol gateway, remote terminal, or network-edge appliance. The five-port Layer 2 switch provides a single integrated point for copper Ethernet connectivity, while MII and RMII options support different host processor architectures. Management through I2C or SPI allows configuration to be incorporated into the equipment controller rather than delegated to separate hardware. For a reliable implementation, route each 100BASE-TX pair as a controlled-impedance differential pair, follow the manufacturer termination choices, and isolate switching-node or clocking sources from analog receive paths.
推薦
Network Security Appliance
The KSZ8895MQXC can support the internal Fast Ethernet fabric of a compact security appliance that must combine several 10/100 Mb/s sensor, service, or management connections with a host processor. Managed Layer 2 operation provides a suitable base for traffic segmentation and port-level control, while the dual management-interface choice supports different embedded processor designs. The switch does not add switching-node conversion loss, but a linear regulator still dissipates power as voltage drops across the device. Thermal design should therefore account for input-to-output voltage difference, total port current, and ambient temperature rather than relying only on package size.
推薦
Test and Measurement System
The KSZ8895MQXC is useful in test and measurement systems that need several instrument-control Ethernet connections but operate entirely at 10/100 Mb/s. Five integrated ports can connect measurement modules, service interfaces, and a controller while the MII or RMII host link connects to the instrument processor. I2C or SPI management simplifies configuration across laboratory and production equipment. Because the device supports a managed Layer 2 architecture, engineers can use its switching features instead of implementing traffic coordination in external software. Layout validation should include return-path continuity, solid supply and ground planes, proper bypass placement, and Ethernet-pair geometry based on the manufacturer hardware checklist.
推薦
推薦產品摘要
工程參考資料，適用於 KSZ8895MQXC — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | KSZ8895MQI | KSZ8895FMQI | KSZ8895RQXI | KSZ8895FQXI | KSZ8895MLXI |
|---|---|---|---|---|---|---|
| Package | 128-pin PQFP (14 x 20 mm) | 128-pin PQFP (14 x 20 mm) | 128-pin PQFP (14 x 20 mm) | 128-pin PQFP (14 x 20 mm) | 128-pin PQFP (14 x 20 mm) | 128-pin PQFP (14 x 20 mm) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Ethernet Port Count | 5 ports | 5 ports | 5 ports | 5 ports | 5 ports | 5 ports |
| Supported Data Rates | 10 Mb/s and 100 Mb/s | 10 Mb/s and 100 Mb/s | 10 Mb/s and 100 Mb/s | 10 Mb/s and 100 Mb/s | 10 Mb/s and 100 Mb/s | 10 Mb/s and 100 Mb/s |
| Host Interface | MII and RMII | MII and RMII | MII and RMII | MII and RMII | MII and RMII | MII and RMII |
| Management Interface | I2C and SPI | I2C and SPI | I2C and SPI | I2C and SPI | I2C and SPI | I2C and SPI |
| Switch Architecture | Layer 2 managed switch | Layer 2 managed switch | Layer 2 managed switch | Layer 2 managed switch | Layer 2 managed switch | Layer 2 managed switch |
主要差異化特點
- Five integrated Fast Ethernet PHYs with managed Layer 2 switching (對比KSZ8895MQI)
- Automotive-qualified KSZ8895 family positioning (對比KSZ8895FMQI)
- Flexible processor connectivity through MII and RMII (對比KSZ8895RQXI)
設計說明
Follow the KSZ8895MQX Hardware Design Checklist for connector termination and printed-circuit layout. For unused RJ45 conductors, the checklist describes two chassis-ground termination options: a 1000 pF, 2 kV capacitor or two 49.9-ohm resistors on the relevant connector pins. Use the option approved by the complete reference design and validate creepage, clearance, surge-current, and EMC requirements for the finished product.
Route every 10/100BASE-TX differential pair as a controlled-impedance pair with continuous reference plane, minimized stubs, and no plane splits beneath the transceiver section. Keep switching nodes and 50 MHz RMII clock routing away from receive-sensitive traces, and avoid crossing Ethernet pairs with unrelated high-speed signals at right angles. Confirm return-path continuity and perform pre-compliance EMC testing because five integrated PHYs can magnify layout-related emissions and immunity problems.
Calculate regulator dissipation from the actual supply voltage, output voltage, and worst-case total Ethernet load rather than from nominal port current alone. Estimated: power loss equals the input-to-output voltage difference multiplied by total device current, plus the output-voltage drop multiplied by the port load. Add the regulator's own loss and use the resulting heat at the highest ambient temperature to determine whether additional copper area, heat sinking, or a lower-loss supply architecture is required.
Do not select an RQXI, FQXI, FMQI, or MLXI variant solely because it uses the same PQFP outline. The RQXI can provide an SW5 RMII 50 MHz clock output, while the FQXI and FMQI variants have family-specific connectivity or timing characteristics. Compare the MII/RMII pin behavior, clock source or sink direction, SMRXDV behavior, fiber support, qualification, and ordering code against the target schematic before approving a replacement.
合規資訊
The product listing identifies the device as RoHS compliant and the manufacturer identifies the KSZ8895 family as automotive qualified. The exact AEC-Q100 grade, lead-free declaration, halogen-free declaration, REACH statement, and conflict-minerals policy require confirmation for the specific order code.
