KSZ8001LA3 - 10/100 Ethernet PHY | Microchip | LQFP-48
料号： KSZ8001LA3 ✗ 停产KSZ8001LA3 概述
An Ethernet PHY is the physical-layer component that translates digital data from a host controller into signals suitable for copper or fiber media, while receiving and decoding the returning signal. In the hierarchy of electronic components, the KSZ8001LA3 is an interface transceiver, then a network interface IC, and ultimately a semiconductor. Its MII, RMII, and SMII support allows integration with host controllers operating at different parallel-interface rates and electrical conventions.
The KSZ8001LA3 supports 10BASE-T and 100BASE-TX Ethernet links as well as 100BASE-FX optical-fiber links. These three media modes allow a single PHY design to cover legacy 10 Mb/s copper networking, Fast Ethernet copper links, and fiber-based point-to-point links. MII, RMII, and SMII support also reduces host-interface restrictions when the PHY is placed between a network controller and physical network medium.
LinkMD cable diagnostics add practical fault-finding capability to the transceiver. Instead of treating every connectivity problem as an application failure, the PHY can help identify cable-related conditions such as opens, shorts, and impedance abnormalities. This diagnostic function is particularly useful in industrial control, embedded networking, test equipment, and network-infrastructure systems where field maintenance must be performed with limited instrumentation.
Typical applications include embedded Ethernet controllers, industrial automation equipment, network switches, industrial control panels, test and measurement systems, and communications equipment. In a typical design, the host controller connects through one of the supported parallel interfaces, while transformer-coupled copper or fiber components provide the physical network connection. The 48-LQFP package is surface-mount and therefore requires a PCB footprint with adequate thermal and assembly capability.
Designers should select the correct external magnetics, interface timing, termination, and decoupling for the intended copper or fiber topology. Power rails should be routed and decoupled carefully because Ethernet transceivers combine high-speed signaling with multiple interface domains. The 1.8 V and 3.3 V supply arrangement must also be respected so that both the PHY core and external interface circuitry operate within their specified voltage domains.
This product page consolidates the verified manufacturer capabilities, distributor availability references, lifecycle observations, package data, and engineering-focused selection guidance. It also distinguishes confirmed pin-compatible alternatives from superficially similar Ethernet PHYs that use different packages and therefore cannot be treated as drop-in replacements.
直接替换替代料： KSZ8001LA3 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
该产品暂无直接替换替代料。
请求替代料KSZ8001LA3 规格参数
| Product Type | 10/100 Ethernet PHY transceiver |
| Supported Copper Standards | 10BASE-T and 100BASE-TX |
| Supported Fiber Standard | 100BASE-FX |
| Host Interfaces | MII, RMII, and SMII |
| Duplex Operation | Full duplex |
| Cable Diagnostics | LinkMD |
| 电源电压 | 1.8 V and 3.3 V |
| 工作温度 | 0°C to 70°C |
| 封装 | 48-LQFP, 7 x 7 mm |
| 安装类型 | Surface mount |
| Ethernet Data Rate | 10 Mb/s and 100 Mb/s |
| Interface Direction | Transceiver with integrated receive and transmit functions |
| Fiber Support | 100BASE-FX |
KSZ8001LA3 48-lqfp, 7 x 7 mm 引脚配置指南
KSZ8001LA3（48-lqfp, 7 x 7 mm 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： KSZ8001LA3.
请参阅 数据手册 以查看完整引脚配置。
典型应用
KSZ8001LA3 适用于 6 应用s: Embedded Ethernet Control, Industrial Automation Terminal, 100BASE-FX Fiber Link, Network Switch Port, Test and Measurement Instrument, Communications Gateway.
Embedded Ethernet Control
The KSZ8001LA3 fits embedded systems that connect a host controller to a 10 Mb/s or 100 Mb/s Ethernet network. Its MII, RMII, and SMII interfaces let the host choose among three parallel-interface formats, while 10BASE-T and 100BASE-TX support covers both legacy and Fast Ethernet copper links. The PHY can sit between the processor or network controller and an isolation-transformer interface. LinkMD diagnostics add a practical maintenance advantage because they help distinguish cabling faults from host or application failures. Designers should budget board area for the 48-LQFP footprint, clean supply routing, magnetics, and the selected interface timing.
推荐
Industrial Automation Terminal
KSZ8001LA3 is appropriate for industrial automation equipment that communicates over 10BASE-T or 100BASE-TX copper Ethernet. The device’s 0°C to 70°C operating range covers many controlled indoor environments, while full-duplex operation supports simultaneous control traffic and data transfer. Its three host-interface options provide flexibility when the terminal uses a microcontroller, DSP, or dedicated Ethernet controller. LinkMD diagnostics can shorten maintenance cycles by helping operators locate opens, shorts, and other cable-related issues. A production design must still evaluate conducted emissions, immunity, isolation strategy, grounding, and surge requirements for its installation environment.
推荐
100BASE-FX Fiber Link
The KSZ8001LA3 supports 100BASE-FX, allowing an embedded system to establish a 100 Mb/s point-to-point fiber connection rather than relying only on copper Ethernet. This is useful where electrical isolation, distance, or industrial cabling conditions make fiber preferable. The PHY presents the link to the host through its MII, RMII, or SMII interface, keeping media-specific signaling inside the transceiver and board-level optical interface design. Implementation requires appropriate fiber-interface components and verified signal-integrity layout. Because the supplied data does not identify fiber distance or optical-output specifications, those values must be confirmed in the complete manufacturer documentation before selecting external components.
推荐
Network Switch Port
KSZ8001LA3 can provide the physical layer for a legacy 10/100 Ethernet port in a switch, gateway, or communications appliance. Supporting 10BASE-T, 100BASE-TX, and 100BASE-FX lets the same transceiver family address copper and fiber ports, while MII, RMII, and SMII connectivity accommodates different switch-ASIC architectures. Full-duplex operation is valuable in throughput-oriented network equipment because transmit and receive paths operate concurrently. The 48-LQFP 7 x 7 mm package requires careful escape routing and adequate copper area, but it remains practical for multilayer boards. LinkMD adds service diagnostics that can improve field troubleshooting compared with an undiagnosable physical layer.
推荐
Test and Measurement Instrument
KSZ8001LA3 can support Ethernet connectivity in test and measurement equipment that exchanges commands or data with a host computer. RMII is especially relevant to designs seeking a compact interface between a network controller and PHY, while MII and SMII provide options for different controller architectures. The supported 100 Mb/s link provides adequate bandwidth for many instrument-control and status-reporting tasks. LinkMD diagnostics can help service technicians identify cable faults encountered during installation. For laboratory use, engineers should verify the complete interface specification, magnetics selection, isolation requirements, and electromagnetic-compatibility margins rather than treating the PHY rating as the certification of the finished instrument.
推荐
Communications Gateway
KSZ8001LA3 is suitable for legacy communications gateways that bridge a local processor or controller to a 10/100 Ethernet network. The three supported host interfaces allow adaptation to an existing system architecture without imposing a single parallel-interface format. Full-duplex operation improves simultaneous request-response traffic, and LinkMD helps field technicians determine whether network failures originate in the cable path. A gateway implementation can use the PHY with an Ethernet controller, MCU, or FPGA-based network interface, provided timing and driver support are confirmed. The 1.8 V and 3.3 V supply arrangement requires rail sequencing and decoupling review, while the 7 x 7 mm LQFP package should be placed with unobstructed assembly and inspection access.
推荐
推荐产品汇总
工程参考数据： KSZ8001LA3 ——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 |
|---|---|
| Package | 48-LQFP (7 x 7 mm) |
| Brand | Microchip Technology |
| Ethernet Media Support | 10BASE-T, 100BASE-TX, 100BASE-FX |
| Host Interfaces | MII, RMII, SMII |
| Supply Voltage | 1.8 V, 3.3 V |
| Operating Temperature | 0°C to 70°C |
| Duplex Mode | Full duplex |
| Cable Diagnostics | LinkMD |
关键差异点
- Supports three host-interface formats in one PHY （对比 KSZ8041MLLI)
- Combines copper and fiber media support （对比 KSZ8051MLL)
- Integrated cable diagnostics （对比 KSZ8041MLLI)
设计说明
Route the MII, RMII, or SMII interface as a short, controlled-length bus between the PHY and host controller. The exact timing, impedance, and grounding requirements must be taken from the complete manufacturer documentation because they were not included in the supplied excerpts. Keep the Ethernet magnetics and their high-current copper connections positioned near the board edge, while separating switching-power and digital return currents from sensitive interface references.
The KSZ8001LA3 uses both 1.8 V and 3.3 V supply domains. Provide local decoupling at the corresponding pins using the capacitance and placement prescribed by the full datasheet and reference design. Check startup ordering, supply tolerances, and the current drawn by the selected PHY mode. Do not infer decoupling values or rail-sequencing requirements from the distributor summaries because those implementation values were not supplied.
Do not treat KSZ8041MLLI or KSZ8051MLL as drop-in substitutes without a pin-by-pin comparison. The supplied cross-reference results identify related products but do not confirm a shared 48-LQFP footprint, identical MII/RMII/SMII mapping, or equivalent media circuitry. A migration should also compare magnetics, fiber support, cable diagnostics, supply domains, timing, and software-driver expectations.
Preserve the manufacturer's recommended placement and copper geometry for the PHY, magnetic components, and optional fiber interface. Pay particular attention to return paths beneath differential or high-speed links and to separation between analog supply routing and digital interfaces. Because the provided data does not include the complete reference layout or isolation recommendation, validate the final stack-up and magnetics choice with the manufacturer’s design guidance.
合规信息
The supplied excerpts do not explicitly confirm RoHS, REACH, lead-free, halogen-free, or conflict-minerals status for the exact KSZ8001LA3 ordering code. AEC-Q100 is treated as not applicable because the device is specified for 0°C to 70°C commercial operation, not as an automotive-qualified product.
