KSZ9031RN - Triple-Speed Gigabit Ethernet PHY | Microchip
料号： KSZ9031RN ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
KSZ9031RN 概述
An Ethernet PHY is the physical-layer component in a network communication hierarchy. It converts digital parallel or serial data from a MAC or network processor into electrical signaling suitable for copper cabling, then converts received signals back into digital data. A triple-speed Gigabit Ethernet PHY can negotiate 10 Mbps, 100 Mbps, or 1000 Mbps operation, allowing one physical network interface to support legacy and high-speed links. The KSZ9031 therefore sits between a network controller and an RJ45 connector or other CAT-5 medium interface.
Key verified features include full-duplex operation across all three supported rates and digital I/O tolerance for 1.8 V, 2.5 V, and 3.3 V systems. The automotive qualification is particularly relevant to in-vehicle Ethernet designs. LinkMD diagnostics and production-test support improve commissioning and fault isolation, while the exposed pad in the 48-QFN package supports thermal performance. The supplied sources also describe parametric NAND-tree support for detecting faults between KSZ9031 I/O connections and the board.
The KSZ9031 family supports GMII or MII digital interfaces according to its configuration. These interfaces connect the PHY to a MAC or Ethernet-capable system-on-chip using separate transmit and receive data paths plus control signals. Exact timing limits, register defaults, magnetics recommendations, and electrical characteristics must be taken from the manufacturer datasheet; they were not present in the supplied search excerpts and are therefore not inferred here.
Typical uses include automotive Ethernet gateways, infotainment systems, vehicle domain controllers, industrial network interfaces, communications equipment, and other embedded systems that require copper Ethernet connectivity with cable diagnostics. An automotive network design can place the PHY beside the host processor and Ethernet magnetics, then use LinkMD results during production test or field maintenance to investigate cable, connector, and routing faults.
Layout is critical because a 1000Base-T link depends on precise high-speed differential routing and controlled impedance. Follow the manufacturer reference layout and recommended component values rather than substituting generic magnetics or termination networks. Keep the exposed-pad thermal path unobstructed, provide the specified local decoupling, and route all four differential pairs as controlled-impedance PCB traces with suitable return paths.
This page consolidates the verified manufacturer and distributor descriptions, available cross-reference evidence, application guidance, and design cautions. It distinguishes confirmed information from missing electrical details so that engineers can use it for initial device selection without mistaking unverified assumptions for datasheet specifications.
直接替换替代料： KSZ9031RN ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： KSZ9031RN （相同外形与封装尺寸） ——差异在于 Package, Product Type, Cable Diagnostics, Cable Type, Data Rate.
快速对比工具——选择替代料号进行并排对比：
KSZ9031RNXIC
✅ 直接替换✓ 有现货
$4.35 / 个
查看数据手册 →KSZ9031RNXIA
✅ 直接替换✓ 有现货
$3.27 / 个
查看数据手册 →KSZ9031RNXCA
✅ 直接替换📋 参考替代料（不在目录中）
DP83867IRPAPT
✅ 直接替换✓ 有现货
$5.4 / 个
查看数据手册 →DP83867IS
✅ 直接替换📋 参考替代料（不在目录中）
KSZ9031RN 规格参数
| Product Type | Integrated triple-speed Ethernet physical-layer transceiver |
| Supported Ethernet Speeds | 10Base-T, 100Base-TX, and 1000Base-T |
| Maximum Supported Data Rate | 1000 Mbps |
| Duplex Support | Full duplex at 10 Mbps, 100 Mbps, and 1000 Mbps |
| Cable Medium | CAT-5 UTP |
| Ethernet Transceiver Count | 4 transceivers |
| Digital Interface | GMII or MII |
| Digital I/O Voltage Tolerance | 1.8 V, 2.5 V, and 3.3 V |
| Cable Diagnostics | LinkMD |
| Automotive Qualification | Automotive qualified |
| Production Test Support | Parametric NAND-tree fault detection |
| 封装 | 48-QFN |
| Package Dimensions | 7 mm x 7 mm |
| Package Thermal Feature | Exposed pad |
| 安装类型 | Surface mount |
| IEEE Compliance | IEEE 802.3 |
| AEC-Q100 Status | Automotive qualified; explicit AEC-Q100 grade not provided |
KSZ9031RN exposed pad 引脚配置指南
KSZ9031RN（exposed pad 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： KSZ9031RN.
请参阅 数据手册 以查看完整引脚配置。
典型应用
KSZ9031RN 适用于 6 应用s: Automotive Ethernet Gateway, In-Vehicle Network Gateway, Industrial Network Interface, Network Communication Equipment, Automotive Infotainment System, Cable Diagnostic Production Test.
Automotive Ethernet Gateway
The KSZ9031RN fits an automotive Ethernet gateway because Microchip identifies the device as automotive qualified and supports 10Base-T, 100Base-TX, and 1000Base-T over CAT-5 UTP. A gateway processor can connect through the PHY while the integrated four-transceiver arrangement supports copper signaling in a compact 48-QFN package. LinkMD diagnostics add value during vehicle production testing and service diagnosis. Before schematic release, confirm the exact temperature grade, supply rails, magnetics, and automotive system-level qualification requirements from the ordered-device documentation.
推荐
In-Vehicle Network Gateway
The KSZ9031RN can serve as the copper Ethernet physical layer between an in-vehicle domain controller and network equipment operating at 10, 100, or 1000 Mbps. Its full-duplex modes, CAT-5 UTP support, and digital I/O tolerance for 1.8 V, 2.5 V, and 3.3 V systems support flexible host integration. LinkMD diagnostics help identify cable or board faults during commissioning. Exact EMC, temperature, clocking, and network-interface requirements must be validated against the automotive platform specification and manufacturer datasheet.
推荐
Industrial Network Interface
The KSZ9031RN supports industrial copper links when its specified electrical limits and automotive qualification satisfy the system requirements. Triple-speed 10/100/1000Base-T operation allows compatibility with legacy devices and Gigabit infrastructure, while full-duplex operation supports sustained bidirectional data transfer. The four-transceiver implementation and 7 mm by 7 mm 48-QFN package conserve board area, and LinkMD assists field troubleshooting. Industrial designers must still verify temperature range, EMC design, isolation strategy, cable length, and component availability.
推荐
Network Communication Equipment
The KSZ9031RN is suitable for network-interface cards, embedded gateways, and communications equipment requiring a copper Ethernet PHY with backward-compatible speed support. Its MII or GMII capability, as stated for the KSZ9031 family, allows connection to a suitable network controller when the selected device configuration provides that interface. Triple-speed negotiation simplifies management of mixed-speed networks, while cable diagnostics improve deployment and production testing. Host timing, reference clocks, register configuration, and PCB constraints require direct datasheet verification.
推荐
Automotive Infotainment System
The KSZ9031RN can connect an infotainment head unit or companion controller to a 10, 100, or 1000 Mbps copper Ethernet network. Full-duplex operation, CAT-5 UTP support, and host I/O levels compatible with 1.8 V, 2.5 V, or 3.3 V digital environments help simplify integration with automotive processors. LinkMD diagnostics can support production and field diagnosis. The design team must confirm media-interface components, EMI constraints, exact temperature grade, and whether the required Ethernet MAC interface is provided by the selected ordering configuration.
推荐
Cable Diagnostic Production Test
The KSZ9031RN is useful in production fixtures because its LinkMD functions facilitate cable and board fault diagnosis during system bring-up and deployment. The supplied documentation also describes parametric NAND-tree support for detecting faults between KSZ9031 I/O connections and the board. A fixture can exercise the PHY through its digital interface, automate diagnostics, and localize wiring or interconnect issues. Test thresholds, access sequences, and production procedures are not present in the supplied excerpts, so implementation must follow the official datasheet and diagnostic-software documentation.
推荐
推荐产品汇总
工程参考数据： KSZ9031RN ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | KSZ9031RNXIC | KSZ9031RNXIA | KSZ9031RNXCA | DP83867IR | DP83867IS |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Texas Instruments | Texas Instruments |
关键差异点
- Integrated triple-speed copper Ethernet support （对比 DP83867IR)
- Cable-fault diagnostics integrated into the PHY （对比 DP83867IS)
- Automotive positioning （对比 DP83867IR)
- Board-production interconnect testing （对比 DP83867IS)
设计说明
Treat the four copper Ethernet pairs as controlled-impedance differential routes and reproduce the manufacturer's reference layout exactly. Keep magnetics, termination, protection, and PHY connections in the prescribed order, provide continuous reference planes beneath the links, and avoid splits or stubs. The supplied excerpts do not provide trace dimensions, so engineers must obtain those values from the official reference design rather than estimate them from another Ethernet PHY.
Preserve the exposed-pad thermal path by following the datasheet's pad and via pattern and placing copper on as many layers as the stack-up permits. Avoid cutting away return-current copper beneath high-speed pairs. Because verified power dissipation, thermal resistance, ambient range, and exact ordering temperature grade are absent, no junction-temperature calculation is presented. Validate the final assembly against the device thermal model and worst-case automotive or industrial conditions.
Do not treat similar Ethernet PHYs or shared QFN packages as automatic drop-in replacements. A valid substitution must match every pin, supply rail, termination requirement, reference clock, reset behavior, digital interface, timing specification, register plan, and thermal-land pattern. The supplied TI rollover document highlights interface-specific distinctions among DP83867 variants; use that evidence as a warning to perform a complete engineering review before substituting any candidate.
Use the exact core and analog supply values, decoupling network, and sequencing limits specified in the manufacturer datasheet. Although the family accepts 1.8 V, 2.5 V, and 3.3 V digital I/O levels, input-level tolerance does not establish which voltage may power each internal rail. Place required bypass capacitors at their specified pins, keep supply loops compact, and verify power-up, power-down, reset, and clock sequencing with the selected host processor.
Confirm the exact suffix before placing an order because automotive temperature grades and packaging codes can differ among KSZ9031 orderable variants. The verified DigiKey record identifies KSZ9031RNXIC, while other marketplace snippets mention KSZ9031RNXIA and KSZ9031RNXCA without authoritative grade data. Obtain the current manufacturer ordering table and authoritative distributor inventory before treating any suffix as interchangeable.
合规信息
Microchip identifies the KSZ9031 as automotive qualified, but the supplied excerpts do not explicitly state RoHS, REACH, AEC-Q100 grade, lead-free status, halogen-free status, or conflict-minerals compliance. The supplied search data mentions IEEE 802.3 compliance for the family.
