KSZ8873MLLV - 3-Port 10/100 Ethernet Switch | Microchip
MPN: KSZ8873MLLV ✓ NakahandaKSZ8873MLLV Ulas
An Ethernet switch is a semiconductor that connects multiple internal network nodes through frame-based switching instead of requiring a separate software bridge in the host controller. Within the network-interface hierarchy, the KSZ8873 combines a three-port managed switch with integrated Fast Ethernet PHYs. This integration reduces external PHY count, board area, and the number of high-speed signal links crossing a system boundary while retaining dedicated switching resources for multiple Ethernet ports.
The KSZ8873MLLV supports 10 Mbps and 100 Mbps operation and includes I2C, MII, SPI, and RMII connectivity. According to the Microchip KSZ8873 product page, the KSZ8873 family is intended for compact, low-port-count systems with an emphasis on low power consumption. Configuration access supports switch monitoring, QoS and CoS packet prioritization, and comprehensive configuration-register access.
The device operates from a 1.66 V to 1.94 V core range and a 2.5 V to 3.465 V interface range. A listed supply current of 115 mA makes board-level power budgeting important when the switch is placed beside an application processor, motor-control subsystem, or industrial network controller. The industrial temperature range extends from -40°C to +85°C, supporting industrial and automotive-adjacent deployments where consumer-grade components would be unsuitable.
Typical implementations include industrial Ethernet gateways, embedded control panels, network-connected test equipment, automotive body and infotainment Ethernet nodes, and compact PLC communication modules. The RMII option is particularly useful when a host processor requires a parallel Ethernet management path rather than a full MII interface.
Layout should preserve the separation of analog PHY circuits, digital switch logic, and crystal-clock or reference-clock distribution. Decoupling must follow the manufacturer’s recommended values, and unused interface pins should be terminated according to the datasheet rather than left to arbitrary bias states. Confirm the exact pin mapping, register defaults, clock requirements, and magnetics recommendations against the current Microchip datasheet before layout release.
Mga alternatibo na pwedeng ilagay na KSZ8873MLLV — parehas na package, pin-to-pin na katugmang. Hindi kasama ang mga bahagi ng iba't-ibang package na nangangailangan ng pagpapaayos ng PCB.
Wala ng magagamit na drop-in alternatibo para sa produkto na ito.
Hilingin ang AlternatiboKSZ8873MLLV Mga Pinakamataas na Rating at Electrical Characteristics
| Product Type | 3-Port Managed Ethernet Switch with Integrated PHYs |
| Number of Ports | 3 ports |
| Ethernet Data Rate | 10 Mbps and 100 Mbps |
| IEEE Standard | IEEE 802.3 |
| Integrated PHY Type | 10/100 Base-T/TX PHY |
| Host Interface | I2C, MII, SPI, and RMII |
| Core Supply Voltage | 1.66 V to 1.94 V |
| Interface Supply Voltage | 2.5 V to 3.465 V |
| Kuru-kuryente ng Pagbibigay | 115 mA |
| Temperature na Operasyon | -40°C to +85°C |
| Packhaging | 64-LQFP (10 mm x 10 mm) |
| Package Type | Lead-free LQFP |
| Uri ng Pagpapasok | Surface Mount |
| Switch Features | QoS/CoS packet prioritization and switch monitoring |
| Configuration Access | Comprehensive configuration-register access |
Gabay sa Pin Configuration ng KSZ8873MLLV lead-free lqfp
Pin configuration para sa KSZ8873MLLV (lead-free lqfp 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 KSZ8873MLLV.
Sumangguni sa datasheet para sa buong pin configuration.
Tipikal na mga Gamit
KSZ8873MLLV ay nararapat para sa 6 aplikasyons: Industrial Ethernet Gateway, Embedded Control Panel, Automotive Body-Controller Ethernet Node, PLC Communication Module, Networked Test and Measurement Instrument, Compact Network Appliance.
Industrial Ethernet Gateway
The KSZ8873MLLV suits an industrial gateway that must consolidate several Fast Ethernet links into a host processor. Its three integrated 10/100 Mbps ports remove the need for separate switch PHYs while I2C, SPI, MII, or RMII provides configuration and management access. The -40°C to +85°C rating supports extended-temperature equipment, and the listed 115 mA supply current allows gateway power budgets to be planned before layout. Ethernet magnetics, surge protection, and the enclosure’s thermal performance remain board-level design responsibilities.
Inirekomenda
Embedded Control Panel
A control panel with a touchscreen, diagnostics controller, and service port can use the KSZ8873MLLV to provide three locally switched Fast Ethernet connections. The integrated 10/100 Base-T/TX PHYs reduce the external component count, while RMII or MII allows the panel’s processor to monitor traffic. I2C or SPI configuration is useful for setting port priorities, addresses, and operating parameters. Layout should keep the digital switch interface away from the analog PHY sections and follow the manufacturer’s recommended decoupling network.
Inirekomenda
Automotive Body-Controller Ethernet Node
The KSZ8873MLLV is a functional fit for a body or infotainment controller requiring three Fast Ethernet ports for sensors, displays, and service connectivity. Its integrated switch fabric supports local traffic handling, while the -40°C to +85°C operating range addresses harsh ambient conditions. Before releasing an automotive design, verify the exact ordering code for AEC-Q100 qualification, transient protection, EMC performance, and network-interface compliance. The controller also needs automotive-qualified Ethernet magnetics and appropriately isolated power supplies.
Inirekomenda
PLC Communication Module
In a PLC or remote I/O module, the KSZ8873MLLV can provide three 10/100 Mbps network ports for a controller, local I/O network, and maintenance connection. The managed switch functions support QoS and CoS packet prioritization, which is useful when operational traffic must remain predictable. Configuration over I2C, SPI, or MII lets a low-power microcontroller initialize and supervise the network. The -40°C to +85°C range supports industrial environments, subject to confirmation of the complete enclosure thermal design.
Inirekomenda
Networked Test and Measurement Instrument
A compact test instrument can use the KSZ8873MLLV to combine an instrument-control port, trigger network, and service interface into a three-port Fast Ethernet switch. Host access through RMII reduces interface wiring, while MII, SPI, or I2C provides alternate management paths. Local switching avoids sending every frame through a host processor, reducing software load. For laboratory use, verify isolation requirements, grounding strategy, and the grounding and isolation guidance for the selected Ethernet magnetics before connecting external test leads.
Inirekomenda
Compact Network Appliance
The KSZ8873MLLV fits compact network appliances that need multiple Ethernet connections in a limited board area. Three integrated PHYs eliminate three external PHY packages and their supporting magnetics footprints, while the 10 mm by 10 mm LQFP keeps the switch compact. The listed core and interface voltage ranges allow a partitioned power tree, and the 115 mA figure provides a basis for regulator sizing. Product planning must still include Ethernet transformers or integrated magnetics, surge protection, status indicators, and connector-specific spacing.
Inirekomenda
Buod ng mga Inirekomendang Produkto
Impormasyon ng Talumpati sa Engineering for KSZ8873MLLV — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang Producto | KSZ8873MLLV-TR | KSZ8873MLL-AM |
|---|---|---|---|
| Package | 64-LQFP (10 mm x 10 mm) | 64-LQFP (10 mm x 10 mm), tape-and-reel ordering code | 64-PQFP (10 mm x 10 mm) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology |
| Switch Ports | 3 | 3 | 3 |
| Ethernet Speed | 10/100 Mbps | 10/100 Mbps | 10/100 Mbps |
| IEEE Standard | IEEE 802.3 | IEEE 802.3 | IEEE 802.3 |
| Management Interfaces | I2C, MII, SPI, RMII | I2C, MII, SPI, RMII | I2C and SPI listed |
Pangunahing mga Pagkakaiba
- Three integrated Fast Ethernet ports in one package (kumpara saKSZ8873MLL-AM)
- Broad host-management connectivity (kumpara saKSZ8873MLL-AM)
- Industrial-range operation for embedded networking (kumpara saKSZ8873MLL-AM)
Talaan ng Disenyo
Partition the board so the three analog PHY sections and their magnetics occupy one side, while the digital switch, management interface, and processor connections occupy the other. Keep copper, clocks, and high-current switching loops away from PHY input/output regions. Use the Microchip datasheet and reference layout for component placement, trace lengths, and the network-impedance environment around each copper connection.
Treat the 1.66 V to 1.94 V core rail and the 2.5 V to 3.465 V interface rail as separate power domains. Place the manufacturer-recommended bulk and high-frequency decoupling capacitors directly beside their corresponding supply pins and isolate noisy digital return current from PHY return paths. The listed 115 mA supply current is only one design input; include Ethernet-magnetics losses, regulators, LEDs, and processor loads when sizing the power tree.
Do not assign an RS-232-style serial interface to the I2C pins or assume that SPI configuration uses the MII signal map. Verify every pin against the 64-LQFP pin-description table and confirm RMII versus MII strap or configuration requirements. Also check clock-source tolerance, PHY reset timing, and the required sequence between supplies, clock, and reset. These interface mistakes can appear as a dead port even when all rails measure correctly.
Impormasyon ng Pagsunod sa Kautusan
The KSZ8873 family is described as being available in a lead-free 64-pin LQFP package. RoHS, REACH, AEC-Q100, halogen-free, and conflict-minerals statements were not established for this exact ordering code.
