LAN9311I-NZW - 2-Port 10/100 Managed Ethernet Switch | Microchip Technology
MPN: LAN9311I-NZW ✓ NakahandaLAN9311I-NZW Ulas
An Ethernet switch is a networking semiconductor that connects multiple Ethernet nodes, manages traffic at the data-link layer, and isolates collision domains. The LAN9311I-NZW belongs to the managed switch hierarchy and supports full- and half-duplex 10BASE-T and 100BASE-TX operation. Its integrated PHYs reduce the need for separate PHY devices, while its 16-bit non-PCI CPU interface supports integration with an embedded host processor.
The LAN9311 and LAN9311i family supports the IEEE 802.3 Ethernet protocol and the IEEE 802.1D and IEEE 802.1Q network-management specifications. Configuration straps allow default parameters and custom configurations to be selected when chip-level resets are released or after the nRST input is asserted. This hardware-configured startup behavior can simplify firmware initialization in systems where fixed switch parameters are acceptable.
The LAN9311I-NZW integrates a 2.5 V core supply with 3.3 V I/O capability and includes an integrated 3.3 V regulator for selected PHY-related requirements. Its parallel CPU interface provides a direct connection to an embedded processor rather than requiring a PCI bus. The 128-pin XVTQFP is intended for multilayer PCB layouts where short high-speed signal routes, continuous ground planes, and controlled clock distribution are important.
Typical uses include industrial embedded Ethernet equipment, network interface controllers, set-top boxes, digital video recorders, IP cameras, USB-to-Ethernet bridges, and industrial control modules. For each application, the two integrated Fast Ethernet ports reduce board area, while the management protocol support helps implement basic bridging, filtering, and prioritization functions.
Layout is the main integration constraint. The manufacturer's LAN9311I XVTQFP placement checklist calls for separate 3.3 V I/O decoupling capacitors near the relevant power pins and recommends an 0603 SMD format for easier placement. Keep the CPU interface, clock source, reset network, and PHY traces short, provide an uninterrupted ground plane, and follow the manufacturer pin and component-placement guidance before release to production.
This product page summarizes the LAN9311I-NZW family, package and interface requirements, standards support, application fit, and verified design guidance. It also separates documented capabilities from unknown electrical details so engineers can consult the manufacturer datasheet for final power, timing, pin, and qualification decisions.
Mga alternatibo na pwedeng ilagay na LAN9311I-NZW — parehas na package, pin-to-pin na katugmang. Hindi kasama ang mga bahagi ng iba't-ibang package na nangangailangan ng pagpapaayos ng PCB.
Variante sa Seri na ito
Katulad na modelo sa serye na katugma sa pagpasok LAN9311I-NZW (parehas na form factor at footprint).
Wala ng magagamit na drop-in alternatibo para sa produkto na ito.
Hilingin ang AlternatiboLAN9311I-NZW Mga Pinakamataas na Rating at Electrical Characteristics
| Device Type | 2-port managed Ethernet switch with integrated PHY |
| Number of Ethernet Ports | 2 ports |
| Ethernet Speed | 10 Mbps and 100 Mbps |
| Copper Ethernet Modes | 10BASE-T and 100BASE-TX |
| Duplex Support | Full duplex and half duplex |
| Host Interface | 16-bit parallel non-PCI CPU interface |
| Ethernet Protocol Compliance | IEEE 802.3 |
| Network Management Compliance | IEEE 802.1D and IEEE 802.1Q |
| Configuration Method | Configuration straps |
| Reset Input | nRST pin |
| Integrated PHY Count | 2 PHYs |
| Package Type | 128-pin XVTQFP |
| Package Dimensions | 14 mm x 14 mm |
| Uri ng Pagpapasok | Surface mount |
| Shipping Format | Tray |
| Core Supply Voltage | 2.5 V |
| I/O Supply Voltage | 3.3 V |
Gabay sa Pin Configuration ng LAN9311I-NZW 14 mm x 14 mm
Pin configuration para sa LAN9311I-NZW (14 mm x 14 mm package). Ang pagnunumero ng pin, mga function, at connection diagram ay tinukoy sa datasheet ng manufacturer. Sumangguni dito para sa eksaktong footprint at mga alituntunin sa soldering.
Wala ng detalyadong pinout data na magagamit para sa LAN9311I-NZW.
Sumangguni sa datasheet para sa buong pin configuration.
Tipikal na mga Gamit
LAN9311I-NZW ay nararapat para sa 6 aplikasyons: Industrial Embedded Ethernet Controller, IP Camera Network Interface, Set-Top Box Ethernet Connectivity, USB-to-Ethernet Bridge, Digital Video Recorder Connectivity, Network Interface Controller Add-In.
Industrial Embedded Ethernet Controller
The LAN9311I-NZW fits an embedded control system that needs two local Fast Ethernet connections for a supervisory controller, service interface, or distributed I/O network. Its two integrated 10BASE-T and 100BASE-TX PHYs reduce the number of external network-interface components, while the 16-bit parallel non-PCI CPU interface connects directly to a suitable embedded processor. IEEE 802.1D and IEEE 802.1Q support adds managed-switching functions. The design trade-off is board area: the 128-pin XVTQFP requires a multilayer PCB with short CPU traces, local decoupling, and careful isolation of clock and reset networks.
IP Camera Network Interface
The LAN9311I-NZW can provide the Ethernet switching layer in an IP camera or surveillance accessory that connects a main imaging processor to a second network endpoint. Two 10/100 ports at 10 Mbps or 100 Mbps are appropriate for camera control traffic, video-related control channels, and auxiliary local connectivity. The parallel host interface can support sustained register and packet-service traffic without a PCI bus. Layout is critical because Ethernet magnetics, clock circuitry, and the 128-pin switch must coexist without introducing excessive coupling into the parallel host signals.
Set-Top Box Ethernet Connectivity
The LAN9311I-NZW is suitable for set-top-box and digital media systems that need managed Fast Ethernet connectivity close to the main processor. One port can connect the internal network while another supports a service, accessory, or diagnostic link. The integrated PHYs simplify the analog network path, and the 16-bit non-PCI host interface provides a practical embedded-host connection. Because the device is a 128-pin XVTQFP, designers should plan the Ethernet magnetics, decoupling, and signal routing during PCB stackup selection rather than treating the switch as a simple two-pin Ethernet addition.
USB-to-Ethernet Bridge
The LAN9311I-NZW can form the managed Ethernet-switch portion of a USB-to-Ethernet bridge or multi-interface network adapter. The embedded host controller can communicate through the 16-bit parallel interface, while two integrated 10/100 PHYs provide the network-side connections. IEEE 802.1D and IEEE 802.1Q support is useful when the product must offer basic frame filtering, priority behavior, or network-management features. The engineering trade-off is that a compact external enclosure still contains a relatively large switch package, requiring careful grounding between the digital host section and Ethernet magnetics.
Digital Video Recorder Connectivity
The LAN9311I-NZW can support a digital video recorder that needs two 10/100 network connections, such as a primary LAN and a camera or uplink segment. Its managed-switch capability and IEEE 802.1Q support can help segment traffic and organize priority-sensitive network traffic. The integrated PHYs eliminate the need for two separate standalone 10/100 interface circuits. For multi-camera systems, the parallel host interface must sustain the expected packet-service workload, so firmware buffering and CPU bus timing should be validated alongside the PCB clock and reset design.
Network Interface Controller Add-In
The LAN9311I-NZW is appropriate for a network interface controller add-in that gives an embedded board access to two managed Fast Ethernet ports. A non-PCI embedded processor can connect through the 16-bit parallel host interface, while the switch handles full- and half-duplex 10BASE-T and 100BASE-TX traffic. Configuration straps allow fixed hardware-selected defaults at reset, which can simplify early boot behavior. Designers must still validate the selected strap state against the intended PHY, management, and reset configuration and must preserve the manufacturer’s recommended pin-specific 3.3 V I/O decoupling arrangement.
Impormasyon ng Talumpati sa Engineering for LAN9311I-NZW — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang Producto |
|---|---|
| Brand | Microchip Technology |
| Package | 128-pin XVTQFP, 14 mm x 14 mm |
| Number of Ports | 2 |
| Ethernet Speed | 10 Mbps and 100 Mbps |
| Copper Interfaces | 10BASE-T and 100BASE-TX |
| Duplex Modes | Full duplex and half duplex |
| Host Interface | 16-bit parallel non-PCI CPU interface |
| Protocol Support | IEEE 802.3, IEEE 802.1D, IEEE 802.1Q |
| Configuration | Configuration straps and nRST input |
| Shipping Format | Tray |
Talaan ng Disenyo
Follow the Microchip LAN9311I XVTQFP placement checklist and place a separate 0603 3.3 V I/O decoupling capacitor close to each relevant power pin. Keep the 2.5 V core and 3.3 V I/O supply distribution paths separate until they join at the appropriate device supply pins. Verify the final capacitor values, placement, and power-pin grouping against DS00002286A before PCB release.
Route the 16-bit parallel host interface over a continuous reference plane and keep the associated clock and nRST traces short. Avoid splitting the ground plane beneath the switch, and maintain the manufacturer’s spacing recommendations around Ethernet and clock circuitry. The 128-pin package offers many signals in a small 14 mm by 14 mm area, so component placement should proceed from the pin table rather than from a generic TQFP footprint.
Do not substitute a generic 128-pin TQFP symbol without checking every LAN9311I-NZW pin assignment. The package is specifically identified as XVTQFP, and differences in exposed-pad, power, ground, clock, strap, reset, PHY, and host-interface assignments can prevent operation. Validate the symbol and pad stack against the manufacturer datasheet and the LAN9311I 128-pin XVTQFP placement checklist.
Separate the Ethernet magnetics and PHY-side routing from the wide host bus while preserving continuous return paths for both sections. Review layer transitions, connector placement, and chassis or shield grounding at the enclosure interface. Because the LAN9311I-NZW combines sensitive Ethernet magnetics interfaces with a high-speed parallel host bus, poor partitioning can add noise and coupling even when the nominal 10/100 data rates are modest.
Impormasyon ng Pagsunod sa Kautusan
The manufacturer product materials cited for the LAN9311I-NZW do not explicitly state the requested compliance statuses. Check the current Microchip product declaration, material declarations, and package-quality documents before treating the device as compliant with a particular substance restriction or automotive qualification program.
