KSZ8873RLL - 3-Port 10/100 Managed Switch | Microchip
부품 번호: KSZ8873RLL ✓ 활성KSZ8873RLL 개요
An Ethernet switch is a network-interface semiconductor that connects multiple physical-layer ports and forwards Ethernet frames according to destination addresses. The KSZ8873RLL belongs to the managed-switch hierarchy: Ethernet switch, network interface controller, interface IC, and semiconductor. Its integrated PHYs reduce board space and external component count in cost-sensitive equipment that does not require a high-port-count switching fabric.
Key features include three integrated 10/100 Mbps ports, support for 10/100BASE-T/TX applications, and configuration through I2C or SPI. The available source data identifies both MII and RMII interfaces, allowing the device to serve systems using a parallel media-independent interface or the more compact reduced MII. Its stated operating-temperature range is 0°C to +70°C, which targets commercial equipment rather than extended industrial or automotive environments.
The KSZ8873RLL combines three Ethernet ports in one small-footprint IC, reducing the need for separate PHY components and board routing. A 100 Mbps data rate suits legacy Fast Ethernet infrastructure, embedded control networks, industrial equipment, and cost-sensitive network interfaces where full Gigabit Ethernet throughput is unnecessary. Manufacturer information describes the device as a power-efficient 10/100 Mbps switch system solution.
Typical uses include compact Ethernet switches, embedded network bridges, industrial control equipment, set-top and consumer networking products, and systems requiring one Fast Ethernet uplink plus internal switched ports. Its I2C and SPI configuration paths can support host processors that need programmable switch behavior without dedicating many host GPIO pins.
Designers should verify the exact MII or RMII configuration, reference-clock arrangement, magnetics interface, and exposed-pad connection against the manufacturer datasheet before layout. Place the 164-ohm clock-termination resistors near the device when the reference-design guidance calls for them, and change the suggested value to 33 ohms when PHY MII mode is selected.
This page consolidates the verified manufacturer and distributor details, documents supported family substitutions, compares package and functional characteristics, and adds implementation guidance that is not presented as a single combined summary in the original search results.
드롭인 대체품: KSZ8873RLL — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: KSZ8873RLL (동일 폼 팩터 및 풋프린트) — 차이점: Package, Product Type, Ethernet Data Rate, Host Interface, Integrated PHY.
KSZ8873MLL
✅ 드롭인가격 문의
데이터시트 보기 →KSZ8873FLL
✅ 드롭인가격 문의
데이터시트 보기 →KSZ8873MML
✅ 드롭인가격 문의
데이터시트 보기 →KSZ8873RLL 최대 정격 & 전기적 특성
| Product Type | Integrated 3-port managed Ethernet switch with PHYs |
| Number of Ports | 3 ports |
| Ethernet Data Rate | 10/100 Mbps |
| Maximum Data Rate | 100 Mbps |
| Supported Ethernet Media | 10/100BASE-T/TX |
| Host Interface | MII and RMII |
| Configuration Interface | I2C and SPI |
| Supply Voltage Options | 2.5 V and 3.3 V |
| 동작 온도 범위 | 0°C to +70°C |
| 패키지 | 64-LQFP (10 mm x 10 mm) |
| Package Type | LQFP |
| 핀 수 | 64 pins |
| 실장 유형 | Surface mount |
| Integrated PHY | Yes |
| Switch Management | Managed switch |
KSZ8873RLL lqfp 핀 구성 가이드
KSZ8873RLL(lqfp 패키지)의 핀 구성입니다. 핀 번호, 기능, 연결 다이어그램은 제조사 데이터시트에 정의되어 있습니다. 정확한 풋프린트와 솔더링 지침은 해당 문서를 참조하십시오.
다음에 대한 상세 핀아웃 데이터 없음: KSZ8873RLL.
다음을 참조하십시오: 데이터시트 전체 핀 구성은 다음을 참조하십시오.
일반적인 애플리케이션
KSZ8873RLL 적합 용도: 6 애플리케이션s: Compact Industrial Ethernet Switch, Embedded Network Bridge, Legacy Fast Ethernet Gateway, Cost-Sensitive Consumer Networking, Set-Top and Media Adapter, Network-Connected Test Instrument.
Compact Industrial Ethernet Switch
The KSZ8873RLL fits a compact industrial Ethernet switch that requires three 10/100 Mbps ports rather than Gigabit Ethernet bandwidth. Its integrated PHYs reduce the number of separate Ethernet transceiver components, while the 64-LQFP package measuring 10 mm by 10 mm supports space-constrained control cabinets and embedded equipment. The verified 0°C to +70°C range must be respected; installations outside that interval require additional thermal analysis or a device with a verified wider rating. I2C or SPI configuration allows a supervising controller to manage address tables and switch behavior while MII or RMII connects the switch to the host processor.
추천
Embedded Network Bridge
The KSZ8873RLL can provide the Ethernet switching layer in an embedded bridge joining legacy Fast Ethernet equipment to a higher-level controller. Three integrated 10/100 Mbps PHYs allow multiple 100 Mbps links to share a small PCB area, and the managed-switch architecture supports more deterministic forwarding behavior than an unmanaged repeater. MII provides a broad parallel host interface, while RMII can reduce host-side wiring when the processor supports it. The principal trade-off is the 100 Mbps ceiling, which is appropriate for legacy equipment but unsuitable for modern Gigabit Ethernet backbones.
추천
Legacy Fast Ethernet Gateway
The KSZ8873RLL is suited to gateways that must bridge several legacy 10/100 Mbps devices into an Ethernet-based control network. Its three integrated ports can support two internal device connections and one uplink without requiring three discrete PHY packages. I2C and SPI control options let the gateway processor configure switch behavior without consuming a large number of GPIO signals. Because the verified data rate is 100 Mbps, the design should account for full-duplex throughput and any store-and-forward latency when routing traffic between industrial nodes.
추천
Cost-Sensitive Consumer Networking
The KSZ8873RLL supports cost-sensitive consumer networking products requiring a small number of Fast Ethernet ports, such as a compact network appliance or peripheral with multiple wired connections. Its integrated three-port 10/100 Mbps architecture limits external component count and board area, while its 10 mm by 10 mm LQFP package is compatible with automated surface-mount assembly. The 0°C to +70°C specification suits typical indoor consumer environments. The design must avoid assuming Gigabit Ethernet compatibility because the verified maximum data rate is 100 Mbps.
추천
Set-Top and Media Adapter
The KSZ8873RLL can serve as a Fast Ethernet switch in a set-top box, media adapter, or display peripheral that exposes multiple wired network ports. Three integrated PHYs and management through I2C or SPI support a compact implementation without external magnetics being implied by the switch IC itself. RMII is useful when the host processor offers a reduced parallel interface, whereas MII allows more flexible clocking arrangements. Designers must apply the manufacturer reference-design guidance for clock termination and magnetics and must verify whether 100 Mbps bandwidth meets each simultaneous video or control traffic stream.
추천
Network-Connected Test Instrument
The KSZ8873RLL is useful in a network-connected test or measurement instrument requiring isolated functional groups connected through Fast Ethernet links. One port can provide an uplink while two ports serve internal modules, and managed switching helps organize traffic among measurement subsystems. The compact 64-LQFP footprint preserves board area for analog or instrumentation circuitry. Its 0°C to +70°C operating specification may suit laboratory equipment, but a controlled enclosure is necessary in warm operating environments. Engineers should also review clock, isolation, grounding, and magnetics requirements in the manufacturer reference design.
추천
추천 제품 요약
엔지니어링 참조 데이터: KSZ8873RLL — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | KSZ8873MLL | KSZ8873FLL | KSZ8873MML |
|---|---|---|---|---|
| Package | 64-LQFP (10x10) | 64-LQFP (10x10) | 64-LQFP (10x10) | 64-LQFP (10x10) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Number of Ethernet Ports | 3 ports | 3 ports | 3 ports | 3 ports |
| Maximum Data Rate | 100 Mbps | 100 Mbps | 100 Mbps | 100 Mbps |
| Ethernet Media | 10/100BASE-T/TX | 10/100BASE-T/TX family functionality | 10/100BASE-T/TX family functionality | 10/100BASE-T/TX family functionality |
| Switch Type | Integrated managed 3-port 10/100 switch with PHYs | KSZ8873 family managed 3-port switch | KSZ8873 family managed 3-port switch | KSZ8873 family managed 3-port switch |
주요 차별점
- Three integrated Fast Ethernet PHYs in one switch IC (vs ENC28J60/SS)
- Supports both MII and RMII host connectivity (vs KSZ8873MLL)
- Managed configuration through I2C and SPI (vs KSZ8873FLL)
- Compact 10 mm by 10 mm 64-LQFP implementation (vs KSZ8873MML)
설계 노트
Implement the clock network according to the KSZ8873 reference-design guidance. The verified Arrow Electronics reference design states that the 164-ohm clock-termination resistors should be placed close to KSZ8873, and that their values should be changed to 33 ohms when PHY MII mode is selected. Keep these components near the relevant device pins, route the clock away from switching-node outputs, and follow the manufacturer layout artwork to minimize skew and reflections.
Reserve the complete 64-LQFP footprint and verify every supply, ground, reference-clock, MII or RMII, LED, magnetics, and management signal before releasing PCB artwork. The supplied excerpts do not contain the complete pin table, so do not infer pin assignments from package position. Also confirm exposed-pad or thermal-land requirements from the manufacturer package drawing; improper ground or thermal-pad connection can affect both signal integrity and device reliability.
Choose MII or RMII according to the host processor and clocking architecture, then apply the manufacturer’s recommended termination values in the selected mode. The verified reference design specifically distinguishes the 164-ohm and 33-ohm clock-termination arrangements. Treat the reference clock as a high-speed signal, use a short and continuous route, place termination components at the correct endpoints, and validate the completed board with an oscilloscope before production.
Design the 2.5 V and 3.3 V supply rails with separate local decoupling appropriate to the manufacturer’s recommended schematic. Because the provided excerpts do not include recommended capacitor values, ESR requirements, current limits, or startup timing, these values must be obtained from the datasheet rather than guessed. Verify the total PHY and digital load, sequencing requirements, and the tolerance of each rail against the exact RLL operating limits before layout release.
규정 준수 정보
The supplied excerpts do not provide explicit RoHS, REACH, lead-free, halogen-free, or conflict-minerals declarations. AEC-Q100 is not applicable because this is a commercial Ethernet interface IC rather than an automotive-qualified device in the supplied data.
