KSZ8842-PMBL - 2-Port 10/100 Ethernet Switch | Microchip
Référence : KSZ8842-PMBL ✗ Fin de vieKSZ8842-PMBL Présentation
An Ethernet switch is a network-semiconductor device that connects multiple physical network nodes while forwarding Ethernet frames according to Layer 2 addresses. The KSZ8842 belongs to the Ethernet switch hierarchy and integrates physical-layer transceivers, frame processing, port management, and a host-facing peripheral bus within one IC. Its PCI interface allows a processor or embedded controller to configure the switch, manage traffic, and exchange data with the connected Ethernet ports without requiring a separate external Ethernet controller.
The manufacturer datasheet identifies the KSZ8842-PMQL/PMBL as the first fully managed two-port switch with a 32-bit, 33 MHz PCI processor interface. The device is compliant with IEEE 802.3u, supports 10/100 Base-T networking, and includes an integrated DMA engine for efficient host data movement. Its four-generation integrated Layer 2 switch architecture supports managed switching functions while reducing the component count of embedded Ethernet designs.
The KSZ8842-PMBL is intended for compact PCI-based embedded systems where two Ethernet links are needed close to the host processor. Typical signal paths include industrial control equipment, embedded servers, communication appliances, test systems, and PCI expansion products. A 122 mA supply current value is identified for this device, making system-level power budgeting important when two ports operate continuously.
The principal design consideration is the 100-LFBGA footprint. The board must provide the exact ball layout defined by the manufacturer package drawing and must accommodate the PCI, clock, power, reset, and Ethernet magnetics interfaces. Review the ordering information and pin-description tables in the manufacturer datasheet before assigning ball assignments or preparing the PCB footprint.
The KSZ8842-PMBL is also the base commercial-temperature ordering code within the PMQL/PMBL PCI-interface family. The PMBL suffix identifies the LFBGA package, while the PMQL suffix identifies a different package. Industrial-temperature ordering variants include the -AM designation; verify the exact suffix, grade, and shipping configuration when substituting parts.
This product page consolidates the known switch, interface, package, and ordering information with engineering-focused application guidance, replacement considerations, and a parameter comparison. It also distinguishes electrical or temperature-grade alternatives from packaging-only order codes so engineers can assess PCB compatibility before redesigning an existing LFBGA design.
Alternatives de remplacement direct pour KSZ8842-PMBL — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
KSZ8842-PMBL-AM
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
KSZ8842-PMBL-AM-TR
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
KSZ8842-PMBL Valeurs maximales et caractéristiques électriques
| Product Type | Managed two-port Ethernet switch |
| Ethernet Port Count | 2 ports |
| Ethernet Speed | 10/100 Base-T |
| Host Interface | Generic PCI interface |
| Host Bus Width | 32 bit |
| PCI Clock Frequency | 33 MHz |
| Switching Architecture | Integrated Layer 2 switch |
| DMA Engine | Integrated |
| Courant d'alimentation | 122 mA |
| IEEE Standard | IEEE 802.3u |
| Boîtier | 100-LFBGA, 9 x 9 mm |
| Nombre de broches | 100 pins |
| Type de montage | Surface mount |
| CPU Interface Family | PCI |
| Low-Power Feature | Low-power consumption |
| Industrial-Temperature Variant | KSZ8842-PMQLI/PMBL-AM |
Guide de configuration des broches du KSZ8842-PMBL 100-lfbga, 9 x 9 mm
Configuration des broches du KSZ8842-PMBL (boîtier 100-lfbga, 9 x 9 mm). La numérotation des broches, les fonctions et les schémas de connexion sont définis dans la fiche technique du fabricant. Consultez-la pour l'empreinte exacte et les directives de soudage.
Aucune donnée de brochage détaillée disponible pour KSZ8842-PMBL.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
KSZ8842-PMBL convient pour 6 applications: Embedded PCI Network Controller, Industrial Control Ethernet Gateway, PCI Communication Appliance, Embedded Test and Measurement Equipment, Network Monitoring Gateway, Compact Embedded Server Interface.
Embedded PCI Network Controller
The KSZ8842-PMBL fits an embedded PCI networking controller that needs two physical Ethernet connections close to a host processor. Its generic 32-bit, 33 MHz PCI interface supports host configuration and data transfer, while the integrated DMA engine is intended to move network data efficiently. The two managed 10/100 Base-T ports are compliant with IEEE 802.3u, allowing one compact IC to replace separate physical-layer and switching functions. The designer must route the PCI bus correctly, follow the 100-LFBGA ball assignments, and allow for the listed 122 mA supply current.
Recommandé
Industrial Control Ethernet Gateway
The KSZ8842-PMBL can support an industrial control gateway requiring two 10/100 Base-T network connections and a PCI host interface. Managed Layer 2 switching provides a more structured network topology than simple repeater connections, while the integrated DMA engine supports efficient frame handling. For industrial deployment, confirm whether the standard temperature grade is adequate or whether the KSZ8842-PMBL-AM ordering option is required. PCB implementation must preserve the 100-LFBGA footprint, support the 33 MHz PCI interface, and include the external Ethernet magnetics required by the reference design.
Recommandé
PCI Communication Appliance
The KSZ8842-PMBL is appropriate for a PCI communication appliance that bridges an embedded processor to two wired Ethernet segments. The device combines a 32-bit, 33 MHz PCI processor interface with two IEEE 802.3u-compliant 10/100 Base-T ports, reducing the need for separate Ethernet interface components. Its integrated DMA engine and managed Layer 2 architecture support efficient traffic handling. System designers should budget for the 122 mA listed supply current, follow the manufacturer package and pin descriptions, and implement the approved magnetic-interface network path.
Recommandé
Embedded Test and Measurement Equipment
The KSZ8842-PMBL can add dual-port Ethernet connectivity to PCI-based test and measurement equipment. Two managed 10/100 ports allow an instrument to connect with a supervisory network and a device under test, while the PCI interface provides a direct path to the host controller. The integration helps reduce board area compared with using multiple discrete Ethernet components. For reliable operation, apply the manufacturer reference layout, account for the listed 122 mA supply current, validate timing at 33 MHz, and provide the external components specified for the 10/100 Base-T interfaces.
Recommandé
Network Monitoring Gateway
The KSZ8842-PMBL is suited to a compact network-monitoring gateway with two 10/100 Ethernet ports and a PCI-based processing section. The managed Layer 2 switch can support controlled traffic forwarding and segmentation, while the integrated DMA engine helps the host processor handle packet data efficiently. This arrangement is useful for equipment that must observe or bridge two wired network segments without relying on a separate switch ASIC. The implementation must follow the exact 100-LFBGA footprint, include appropriate Ethernet isolation and magnetics, and verify the device's operating limits from the manufacturer datasheet.
Recommandé
Compact Embedded Server Interface
The KSZ8842-PMBL can provide dual Fast Ethernet connectivity for a compact embedded server or communications module using a PCI bus. The generic 32-bit, 33 MHz PCI interface is appropriate for host-managed designs, and the integrated DMA engine supports efficient data transfer between the processor and the two 10/100 ports. IEEE 802.3u compliance provides a defined basis for the Fast Ethernet ports. Because the LFBGA package concentrates interconnections in a small area, PCB assembly and inspection require careful process control. Follow the manufacturer ball map and reference layout rather than deriving a footprint from a generic 100-pin BGA drawing.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour KSZ8842-PMBL — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | KSZ8842-PMBL-AM | KSZ8842-PMBL-AM-TR |
|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 100-LFBGA (9 x 9 mm) | 100-LFBGA (9 x 9 mm) | 100-LFBGA (9 x 9 mm) |
| Ethernet Port Count | 2 ports | 2 ports | 2 ports |
| Ethernet Speed | 10/100 Base-T | 10/100 Base-T | 10/100 Base-T |
| Host Interface | Generic 32-bit, 33 MHz PCI | Generic 32-bit, 33 MHz PCI | Generic 32-bit, 33 MHz PCI |
| Temperature Designation | Standard ordering code | Industrial-temperature -AM designation | Industrial-temperature -AM designation |
| IEEE Standard | IEEE 802.3u | IEEE 802.3u | IEEE 802.3u |
Principaux différenciateurs
- Integrated PCI networking in the LFBGA device (vs KSZ8842-PMBL-AM)
- Temperature-grade choice without changing the PCB footprint (vs KSZ8842-PMBL-AM-TR)
- Clear sourcing configuration for reel-based production (vs KSZ8842-PMBL-AM)
Notes de conception
Base the PCB land pattern on the manufacturer drawing for the 100-LFBGA 9 x 9 mm KSZ8842-PMBL package, not on a generic 100-ball BGA footprint. Confirm ball coordinates, pad dimensions, solder-mask limits, and exposed or routed ground connections against the package drawing. The KSZ8842-PMQL uses PQFP and therefore requires an entirely different footprint.
Route the 32-bit, 33 MHz PCI interface as a controlled-length, contiguous bus and follow the manufacturer's reference layout. Maintain the specified impedance, provide continuous ground references, and avoid splitting planes beneath the switching region. PCI timing margins depend on the complete host, trace, connector, and switch path, so validate the final layout with appropriate signal-integrity analysis.
Estimated: using the listed 122 mA supply current and a nominal 3.3 V rail, the device consumes approximately 0.40 W before accounting for tolerance or external-interface loading. Use this figure only for preliminary budgeting and confirm the actual rail voltage and current limits in the manufacturer datasheet. Place local bypass capacitors according to the reference design and keep switching-current return paths compact.
Do not substitute KSZ8842-PMQL for KSZ8842-PMBL on an existing board because the packages are not interchangeable. Also distinguish the base device, the industrial-temperature -AM option, and the -TR tape-and-reel shipping code. A packaging suffix changes how the component is delivered, while the -AM designation changes the temperature ordering condition; both should be checked before a production release.
Informations de conformité
The manufacturer datasheet identifies IEEE 802.3u compliance and an industrial-temperature ordering variant, but no RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declaration was identified for this exact ordering code.
