LAN91C110-PU - 10/100 Ethernet Controller | Microchip
料号： LAN91C110-PU ✓ 量产中LAN91C110-PU 概述
An Ethernet controller is a semiconductor that manages frame transmission and reception between a host processor and a network medium. The LAN91C110-PU provides a hardware interface suitable for systems whose CPU or system bus is not based on PCI. By using a generic parallel host interface, it can be connected to compatible processors and bus bridges without requiring a PCI-specific interface architecture.
The principal feature set includes support for 10/100 Base-T/TX networking, a selectable 16-bit or 32-bit host interface, and an integrated Ethernet MAC function. The parallel interface provides a practical connection point for embedded systems, industrial controllers, legacy computer systems, and custom communications equipment. Its 144-pin TQFP package supports the numerous digital host, clock, reset, media, and power connections required by the controller and its external physical-layer interface.
The LAN91C110-PU separates network-medium handling from the host-side system bus. The MAC processes Ethernet frame activity while the generic 16/32-bit interface transfers control and data information to the host processor. This division of responsibilities is particularly useful when a system already has an established embedded bus architecture but requires standards-based 10/100 Ethernet connectivity rather than a PCI peripheral arrangement.
Typical applications include Fast Ethernet PC Card adapters, embedded control systems, industrial data-acquisition equipment, legacy network upgrades, and custom host-bus designs. It can also suit embedded Linux platforms and other processor-based equipment requiring a parallel Ethernet connection. System-level clocking, physical-layer connectivity, magnetic-interface components, and host-bus timing remain part of the complete design rather than functions implied solely by the controller IC.
Designers should review the manufacturer datasheet before assigning signals because the complete 144-pin assignment, operating limits, interface timing, clock requirements, and recommended external networks must be followed exactly. PCB layout should preserve the required short paths, appropriate grounding, and controlled clock and data-routing geometry. Host firmware must also initialize the controller and configure its medium-access and host-interface operation according to the manufacturer procedure.
This page organizes the confirmed device identity, package information, host-interface capabilities, use cases, sourcing path, and design considerations into an engineering-focused reference. It also distinguishes the controller's documented role from the additional PHY, magnetics, firmware, and bus-interface engineering required to build a complete Ethernet-connected product.
直接替换替代料： LAN91C110-PU ——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LAN91C110-PU 规格参数
| Product Type | 10/100 Base-T/TX Fast Ethernet controller |
| Supported Ethernet Rate | 10/100 Mb/s |
| Host Interface Width | 16/32 bit |
| Host Interface Type | Generic parallel CPU and system-bus interface |
| Protocol Function | Ethernet Media Access Control (MAC) |
| Target System Architecture | Non-PCI connectivity systems |
| Primary Target Application | Second-generation Fast Ethernet PC Card adapters |
| Package Type | 144-pin TQFP |
| Package Body Size | 20 mm x 20 mm |
| Mounting Technology | Surface-mount technology |
| Ethernet Physical Standard | 10/100 Base-T/TX |
| RoHS 状态 | unknown |
| REACH Status | unknown |
| AEC-Q100 Qualification | not_applicable |
LAN91C110-PU 20 mm x 20 mm 引脚配置指南
LAN91C110-PU（20 mm x 20 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： LAN91C110-PU.
请参阅 数据手册 以查看完整引脚配置。
典型应用
LAN91C110-PU 适用于 6 应用s: Fast Ethernet PC Card Adapter, Non-PCI Embedded Ethernet Platform, Industrial Data Acquisition Controller, Legacy Network Connectivity Upgrade, Custom Communications Equipment, Embedded Linux Network Appliance.
Fast Ethernet PC Card Adapter
The LAN91C110-PU is directly aligned with second-generation Fast Ethernet PC Card adapters because it supports 10/100 Base-T/TX and provides a generic 16/32-bit host interface. This interface can adapt the controller to compatible CPU or system-bus arrangements rather than requiring a PCI-specific peripheral design. A complete adapter still requires the external Ethernet physical-layer and magnetic-interface components, host-side bus control, firmware initialization, and the signal assignments specified in the manufacturer datasheet. The 144-pin TQFP also provides enough dedicated connectivity for a parallel host bus, clocking, reset, interrupt, and network-medium functions without combining the controller with an unrelated MAC architecture.
Non-PCI Embedded Ethernet Platform
The LAN91C110-PU is well suited to embedded platforms that already use a custom CPU bus and need standards-based Fast Ethernet connectivity. Its generic 16/32-bit parallel host interface provides a more natural integration path than a PCI-only controller, while the MAC implementation handles Ethernet media access. Engineers should verify bus timing, address decoding, interrupt behavior, clocking, and reset requirements before committing the board layout. The final Ethernet network path must also include a compatible physical-layer interface and the magnetic components recommended for isolated copper connections.
Industrial Data Acquisition Controller
For industrial acquisition equipment that must collect and forward measurements over a 10/100 Mb/s network, the LAN91C110-PU can provide a dedicated Ethernet MAC and a generic parallel interface to the measuring controller. The selectable 16-bit or 32-bit host width allows the system architect to align the data path with processor capability and throughput needs. Firmware must manage descriptors, interrupts, buffers, and network events according to the device procedures, while the analog and digital layout should preserve signal integrity for the host clock and bus. The external Ethernet physical layer remains a separate implementation requirement.
Legacy Network Connectivity Upgrade
The LAN91C110-PU can support modernization of legacy equipment that needs a 10/100 Ethernet interface without adopting a PCI bus. Its generic 16/32-bit interface can be connected to a compatible processor or bridge, making it useful for industrial controllers, embedded systems, and older computer platforms with established expansion architectures. Designers should inventory the existing bus timing and firmware constraints, then implement the controller register model and driver requirements. A footprint-compatible replacement should not be assumed merely because another controller offers Ethernet connectivity.
Custom Communications Equipment
Custom communications equipment can use the LAN91C110-PU to add a dedicated 10/100 Base-T/TX MAC alongside a general-purpose embedded processor. The controller's parallel interface supports a 16-bit or 32-bit implementation, which can be matched to the host bus architecture and data-transfer requirements. This arrangement is useful when the product needs a stable Ethernet media-access function without incorporating a large Ethernet controller into the main processor. The design must account for the full 144-pin assignment, clock and reset sequencing, host interrupts, transceiver connections, and the firmware configuration sequence specified by the manufacturer.
Embedded Linux Network Appliance
The LAN91C110-PU can serve as the Ethernet MAC in an embedded Linux appliance that uses a non-PCI processor interface. Linux-based designs benefit from a dedicated MAC when the host CPU requires its resources for application processing, storage, or control functions. Software integration must include the appropriate controller driver, buffer management, interrupt handling, and network-interface configuration. Board-level implementation should follow the manufacturer timing and layout guidance for the host bus and external media interface, ensuring that 10/100 Mb/s operation is stable under sustained traffic.
工程参考数据： LAN91C110-PU ——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 |
|---|---|
| Manufacturer | Microchip Technology |
| Package | 144-pin TQFP (20 mm x 20 mm) |
| Device Type | 10/100 Base-T/TX Fast Ethernet controller |
| Supported Data Rate | 10/100 Mb/s |
| Host Interface | Generic parallel 16/32-bit interface |
| Ethernet Function | Media Access Control (MAC) |
| Target Architecture | Non-PCI CPU and system-bus systems |
| Primary Application | Fast Ethernet PC Card adapters and custom connectivity products |
| Pin Count | 144 pins |
| Mounting Technology | Surface mount |
设计说明
Assign all 144 signals from the manufacturer pin-description table before routing the PCB. Treat the 16/32-bit host bus as a synchronous high-speed interface, keep clock and data paths appropriately matched, and place the interface near the host processor or bridge when practical. Confirm the exposed-pad, power-plane, and decoupling requirements from the package drawing and recommended application circuit.
Separate the Ethernet medium-side circuitry from sensitive host-side signals and use the manufacturer-recommended physical-layer and magnetic-interface topology. Maintain short return paths for digital ground and power distribution, and avoid routing communication signals through areas where switching or high-current return paths could inject noise. The external transceiver and magnetics are not included in the controller's MAC function.
Do not substitute another Ethernet controller solely because it supports 10/100 Mb/s. Pin compatibility requires the same 144-pin TQFP footprint, host-bus width and timing, clock and reset behavior, interrupt architecture, MAC register compatibility, and transceiver connections. Validate any proposed alternative against the manufacturer documentation and the existing driver before treating it as a drop-in replacement.
合规信息
Compliance information was not stated in the manufacturer or distributor material used for this product record.
