KSZ8842-PMQL - 2-Port 10/100 PCI Ethernet Switch | Microchip
부품 번호: KSZ8842-PMQL ✓ 활성KSZ8842-PMQL 개요
An Ethernet switch is a Layer 2 network device that forwards Ethernet frames between connected nodes while using MAC-address learning to reduce unnecessary traffic. Within the network hierarchy, the KSZ8842-PMQL is an Ethernet interface IC and network interface controller that connects a PCI host processor to two 10/100 Base-TX ports. Its managed-switch architecture supports centralized port control, status monitoring, and traffic management in embedded industrial, communications, and legacy PCI systems.
Key features include two integrated 10/100 Ethernet ports, a 32-bit PCI interface operating at 33 MHz, IEEE 802.3u compliance, an integrated DMA engine, and a low-power operating design. The PQFP package provides 128 accessible package positions and uses leaded technology for compatibility with established PCI motherboard and embedded-controller assemblies. An industrial-temperature ordering option, KSZ8842-PMQLI, extends the family for applications requiring extended temperature operation.
Architecturally, the KSZ8842-PMQL belongs to the KSZ8842 fourth-generation integrated Layer 2 switch family. Separate PCI and non-PCI implementations allow designers to match the host interface to the platform, while the PMQL version retains the 32-bit PCI processor connection. The integrated DMA engine assists efficient packet transfer between the PCI host and switch ports, reducing the processing burden associated with moving Ethernet traffic through host memory.
Typical applications include PCI-based industrial controllers, embedded communications appliances, test and measurement systems, legacy PCI server equipment, and custom network interface cards. The device is particularly suitable when two copper Ethernet ports are required without adding an external two-port switch. Designers must also verify the host platform's supported PCI electrical characteristics, bus width, clocking, and software configuration model before releasing a new design.
For a new design, route each differential Ethernet pair through a controlled-impedance layout, keep the PHY and magnetics interface routing compact, and follow the manufacturer's reference layout for power, ground, reset, and clock connections. Because this is a legacy PCI bridge with a large leaded package, confirm long-term sourcing and lifecycle status with Microchip before committing to high-volume production.
This page combines the exact manufacturer and distributor identification for KSZ8842-PMQL with package, interface, application, and procurement guidance. It also distinguishes the PCI implementation from related non-PCI KSZ8842 members and identifies the temperature-graded PMQLI counterpart for industrial design reviews.
드롭인 대체품: KSZ8842-PMQL — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
KSZ8842-PMQLI
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
KSZ8842-PMQL 최대 정격 & 전기적 특성
| Product Type | Managed two-port Ethernet switch with PCI interface |
| Number of Ethernet Ports | 2 ports |
| Ethernet Speed | 10/100 Base-TX |
| CPU Interface | Generic 32-bit PCI |
| PCI Clock Frequency | 33 MHz |
| Network Layer | Layer 2 |
| Ethernet Standard | IEEE 802.3u |
| Switch Architecture | Fully managed two-port switch |
| DMA Engine | Integrated |
| Power Management | Low-power consumption |
| 패키지 | 128-pin PQFP, 14 mm x 20 mm |
| 실장 유형 | Surface mount |
| Industrial-Grade Variant | KSZ8842-PMQLI |
| Industrial Variant Availability | Available from Q1 2006 |
| Manufacturer | Microchip Technology |
| Original Manufacturer | Micrel Semiconductor |
| Maximum Link Speed | 100 Mb/s |
KSZ8842-PMQL 128-pin pqfp, 14 mm x 20 mm 핀 구성 가이드
KSZ8842-PMQL(128-pin pqfp, 14 mm x 20 mm 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: KSZ8842-PMQL.
다음을 참조하십시오: 데이터시트 전체 핀 구성은 다음을 참조하십시오.
일반적인 애플리케이션
KSZ8842-PMQL 적합 용도: 6 애플리케이션s: PCI Industrial Controller, Embedded Communications Appliance, PCI Network Interface Card, Test and Measurement Instrument, Legacy PCI Server Connectivity, Embedded Ethernet Media Gateway.
PCI Industrial Controller
The KSZ8842-PMQL fits a PCI industrial controller that needs two integrated 10/100 Ethernet ports instead of a processor with a single embedded MAC plus an external switch. Its 32-bit, 33 MHz PCI interface connects directly to the host bus, while the integrated DMA engine supports efficient packet movement between host memory and the two switched ports. IEEE 802.3u compliance provides a defined Fast Ethernet foundation for supervisory, configuration, and process-control networks. The two-port managed-switch arrangement also permits a compact controller architecture with one upstream link and one downstream equipment link. Use KSZ8842-PMQLI when the enclosure requires the industrial-temperature grade of the same PQFP family.
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Embedded Communications Appliance
The KSZ8842-PMQL is suitable for embedded communications equipment that bridges a PCI host processor to two copper Ethernet networks. A managed Layer 2 switch can support two endpoints on one card, reducing the need for a separate Ethernet switch and simplifying physical implementation. The generic 32-bit, 33 MHz PCI interface provides a defined host connection, and the integrated DMA engine helps the host transfer frames without handling every Ethernet transaction in software. The 128-pin PQFP package is relatively large, so designers should reserve adequate board area and verify assembly capability. For extended-temperature installations, evaluate KSZ8842-PMQLI after confirming the complete system's thermal requirements.
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PCI Network Interface Card
The KSZ8842-PMQL supports a two-port PCI network interface card for legacy embedded platforms that need independent 10/100 Ethernet connections. Two integrated switched ports can consolidate network functions onto one PCI card while preserving a conventional processor-interface architecture. The 32-bit, 33 MHz PCI connection supports integration with compatible host systems, while the integrated DMA engine assists efficient frame transfer. Board design work must follow the manufacturer's reference layout for the PQFP footprint, power distribution, Ethernet differential pairs, and magnetics interface. Before layout release, verify the target PCI platform's clock, termination, interrupt, and driver requirements against the manufacturer datasheet.
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Test and Measurement Instrument
The KSZ8842-PMQL can serve a PCI-based test or measurement instrument that must communicate through two isolated Fast Ethernet ports. One port may connect to a supervisory workstation while the other reaches an instrument or device under test, and the managed Layer 2 switch provides a more integrated implementation than two unrelated Ethernet interfaces. The device's 10/100 Base-TX capability and IEEE 802.3u compliance align with legacy test networks. Its integrated DMA engine can improve host-side packet handling, but the host software must correctly initialize the switch registers. Confirm EMC, temperature, grounding, and isolation requirements for the finished instrument before selecting the standard or industrial ordering option.
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Legacy PCI Server Connectivity
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Embedded Ethernet Media Gateway
The KSZ8842-PMQL fits an embedded media or protocol-conversion gateway that connects a PCI processor to two copper networks. The managed switch permits one external uplink and one local equipment port without requiring a discrete two-port switch beside the processor. Its 10/100 Ethernet capability suits legacy control and communications networks, while the integrated DMA engine supports efficient data movement in gateway designs. The large 128-pin PQFP footprint requires deliberate placement to simplify power routing and keep Ethernet traces away from sensitive signals. Confirm that the host software supports the KSZ8842 register set and that the gateway's thermal environment falls within the selected PMQL ordering grade.
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추천 제품 요약
엔지니어링 참조 데이터: KSZ8842-PMQL — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | KSZ8842-PMQLI |
|---|---|---|
| Package | 128-PQFP (14x20 mm) | 128-PQFP (14x20 mm) |
| Brand | Microchip Technology | Microchip Technology |
| Product Function | Managed two-port Ethernet switch with PCI interface | Managed two-port Ethernet switch with PCI interface |
| Number of Ethernet Ports | 2 ports | 2 ports |
| Ethernet Speed | 10/100 Base-TX | 10/100 Base-TX |
| CPU Interface | Generic 32-bit PCI at 33 MHz | Generic 32-bit PCI at 33 MHz |
| Temperature Grade | Standard grade | Industrial-temperature grade |
| Ethernet Standard | IEEE 802.3u | IEEE 802.3u |
| DMA Engine | Integrated | Integrated |
| Power Features | Low-power consumption | Low-power consumption |
주요 차별점
- Two integrated switched Fast Ethernet ports on one PCI component (vs KSZ8041RNL)
- Direct legacy PCI host connectivity (vs KSZ8842-16MVIL)
- Industrial-temperature counterpart retains the same mechanical footprint (vs KSZ8842-PMQLI)
설계 노트
Follow the manufacturer's reference layout for the 128-pin PQFP footprint and place the device so its power and ground connections have short, low-impedance paths. The 14 mm by 20 mm body demands careful escape routing, particularly if Ethernet differential pairs and PCI signals must leave the device in constrained directions. Use the pin-description table in the Microchip datasheet to assign every package position, and verify the land pattern against the actual PMQL drawing before releasing artwork.
Keep the Ethernet differential pairs short, impedance-controlled, and continuously referenced to a solid ground plane. Route each port toward its magnetics or external network interface without introducing test pads or unrelated high-speed traces into the pair path. Separate switching-power stages and inductors from the Ethernet and PCI routing, and place decoupling capacitors at the device pins according to the manufacturer's reference design. These steps reduce radiated emissions, insertion loss, and susceptibility to ground bounce.
Do not treat KSZ8842-PMBL as a drop-in substitute for KSZ8842-PMQL because the former uses an LFBGA package and the latter uses a 128-pin PQFP. Likewise, the KSZ8842-16M and KSZ8842-32M non-PCI members are not direct replacements for the PCI PMQL device. Validate PCI electrical behavior, firmware initialization, switch-register configuration, reset sequencing, and interrupt handling before committing either the standard or industrial-temperature ordering option to production.
규정 준수 정보
The Ethernet interface is not an automotive-qualified product in the cited manufacturer material. RoHS, REACH, lead-free, halogen-free, and conflict-minerals status were not identified in the cited product pages and should be confirmed with Microchip for the exact ordering code.
