KSZ8841

Please consider this device

The KSZ8842-series of 2-port switches includes PCI and non-PCI CPU interfaces.

The datasheet describes the KSZ8842-PMQL/PMBL PCI CPU interface chips. KSZ8842-PMQL is PQFP package chip, KSZ8842-PMBL is LFBGA package chip. For information on the KSZ8842-MQL/MBL CPU non-PCI interface switches, refer to the KSZ8842-MQL/MBL datasheet.

The KSZ8842-PMQL/PMBL is the industry's first fully managed 2-port switch with a 32-bit/33MHz PCI processor interface. It is a proven, 4th generation, integrated Layer 2 switch that is compliant with the IEEE 802.3u standard. An industrial temperature grade version of the KSZ8842-PMQL/PMBL, also can be ordered the KSZ8842-PMQLI/PMBL AM. The KSZ8842-PMQL/PMBL can be configured as a switch or as a low-latency (<310 nanoseconds) repeater in latency-critical, embedded or industrial Ethernet applications.

For industrial automation applications, the KSZ8842-PMQL/PMBL can run in half-duplex mode regardless of the application. The KSZ8842-PMQL/PMBL offers an extensive feature set that includes tag/port-based VLAN, quality of service (QoS) priority management, management information base (MIB) counters, and CPU control/data interfaces to effectively address Fast Ethernet applications. The KSZ8842-PMQL/PMBL contains two 10/100 transceivers with patented, mixed-signal, low-power technology three media access control (MAC) units, a direct memory access (DMA) channel, a high-speed, non-blocking, switch fabric, a dedicated 1K entry forwarding table, and an on-chip frame buffer memory.

Microchip's complimentary and confidential LANCheck® online design review service is available for customers who have selected our products for their application design-in. The  is subject to Microchip's  and requires a myMicrochip account.

Features
  • Non-blocking switch fabric assures fast packet delivery by utilizing a 1K entry MAC Address look-up engine and a store-and-forward architecture
  • Fully compliant with IEEE 802.3u standards
  • Full-duplex IEEE 802.3x flow control (Pause) with force mode option
  • Half-duplex back pressure flow control
  • IEEE 802.1Q VLAN support for up to 16 groups (full-range of VLAN IDs)
  • VLAN ID tag/untag options, per port basis
  • IEEE 802.1p/Q tag insertion or removal on a per-port basis (egress)
  • Programmable rate limiting at the ingress and egress port
  • Broadcast storm protection
  • IEEE 802.1d spanning tree protocol support
  • MAC filtering function to filter unicast packets
  • Unknown MAC address forwarding function
  • Direct forwarding mode enabling the processor to identify the ingress port and to specify the egress port
  • IGMP v1/v2 snooping support for multicast packet filtering
  • IPV6 Multicast Listener Discovery (MLD) snooping support
  • Management information base (MIB) counters for fully compliant statistics gathering: 32 MIB counters per port
  • Loop back modes for remote failure diagnostics
  • There are three kinds of register groups:
  • The PCI configuration registers are used to initialize and configure the PCI interface
  • The PCI control/status registers are used to communicate between the host and KSZ8842-PMQL/PMBL
  • Switch registers are used to support transceiver control and status. They are configurable on-the-fly (port-priority, 802.1p/d/Q, etc.)
  • Per port, 802.1p and DiffServ based
  • Re-mapping of 802.1p priority field on a per port basis
  • Full-chip hardware power-down (register configuration not saved) provides for low power dissipation
  • Per port-based software power-save on PHY (idle link detection, register configuration preserved)
  • Single power supply: 3.3V
  • Commercial Temperature Range: 0°C to +70°C
  • Industrial Temperature Range: -40°C to +85°C
  • Available in 128-pin PQFP and 100-ball LFBGA
Parameter
Parameter Name Value Value
Description 10/100 Ethernet Switch with Generic Interface 10/100 Ethernet Switch with Generic Interface
Ethernet Bandwidth 10Base-T/100Base-TX 10Base-T/100Base-TX
MAC 1 1
PHY 1 1
TX/RX RAM Buffer(Bytes) 8KB 8KB
Interrupt Pin Yes Yes
LEDs 3 3
Op. Voltage (V) 3.3 3.3
# Ethernet Ports 3 3
Temp. Range Min. (°C) -40 -40
Temp. Range Max. (°C) 85 85
Automotive Yes Yes
# of Ether Ports 1 1
Managed Yes Yes
Copper Support 10/100 10/100
8/16-bit Yes Yes
32-bit Yes Yes
PCI Yes Yes
Supply Voltage (V) 3.3 3.3
Internal LDO Yes Yes
Vdd I/O (V) 3.3/5.0 3.3/5.0
LinkMD Cable Diag Yes Yes
Repeater Mode Yes Yes
Pin-Pin With n/a n/a
ESD Rating (KV) n/a n/a
Smart Power Adjust n/a n/a
Largest Pkt-Size Bytes 1916 1916
IPV6 Yes Yes
# of VLAN 16 16
Flow Ctrl Yes Yes
Rate Limiting Yes Yes
Static MAC Addr Yes Yes
Documents
KSZ8841MQL Data SheetData Sheets04/19/2016649KB
KSZ8841-PMQL Data SheetData Sheets04/19/2016544KB
AN2157 - Transient Protection in Power Over Ethernet ApplicationsAppNote05/24/2016229KB
Micrel AN 109 - Unmanaged Ethernet Redundant RingAppNote10/02/201567KB
Micrel AN 114 - Virtual LANAppNote10/02/201585KB
Micrel AN 115 - Voice Video and Data Communications using a 2-Port Switch and Generic Bus InterfaceAppNote10/02/2015262KB
Micrel AN 116 - Wake-on-LAN and Wake-up Event of Power ManagementAppNote10/02/201551KB
Micrel AN 138 - QoS Priority Support in the KSZ8842 FamilyAppNote11/12/2015157KB
Micrel AN 142 - Wake-on-LAN and Wake-Up Event of Power Management in the KSZ8841-PMQLAppNote11/12/201551KB
Micrel AN 24 - Ethernet over POFAppNote10/01/2015149KB
Micrel AN 25 - EtherSynch - Synchronization PerfectedAppNote10/01/2015267KB
Micrel AN 27 - Fast Ethernet: Delivery of Data in Industrial ApplicationsAppNote10/01/2015108KB
Micrel AN 3 - 32-Bit Non-PCI Interface for Embedded System Design with Ethernet SolutionAppNote09/29/2015260KB
Micrel AN 31 - General PCB Design and Layout GuidelinesAppNote10/01/2015104KB
Micrel AN 32 - Get in Sync!AppNote10/01/20151432KB
Micrel AN 44 - Interfacing Fast Ethernet to ProcessorsAppNote10/01/2015149KB
Micrel AN 45 - Interfacing Fast Ethernet Transceivers to MAC ProcessorsAppNote10/01/2015122KB
Micrel AN 77 - PCB Design Considerations for KSZ8841/42 Family of Ethernet ControllersAppNote10/02/2015315KB
Micrel AN 8 - Capacitive Coupling Ethernet Transceivers without Using TransformersAppNote09/30/2015103KB
Micrel AN 81 - PHY Speed and Duplex ConfigurationAppNote10/02/2015132KB
Micrel AN 84 - Programmable Guide and Supporting Software for KSZ88xxM Generic Bus InterfaceAppNote10/02/201580KB
Micrel AN 89 - QoS Priority Support In the KSZ8842 FamilyAppNote10/02/2015157KB
Micrel AN 91 - Reducing Maintenance Costs With Cable Diagnosis and Micrels LinkMDAppNote10/02/2015420KB
KSZ8841MQL_V1.4_HP.zipDesign Guides02/19/20164494KB
KSZ8841PMQL_V1.5_DP.zipDesign Guides02/19/20163941KB
Ordering Information
Part NumberLeadsPackage TypeTemp RangePacking1+26+100+1000+5000+
KSZ8841-16MQL128PQFP0C to +70CTRAY8.076.736.125.655.36
KSZ8841-16MVL128LQFP0C to +70CTRAY8.857.376.716.205.88
KSZ8841-16MVLI128LQFP-40C to +85CTRAY10.348.627.847.246.87
KSZ8841-16MVLI-TR128LQFP-40C to +85CT/R10.348.627.847.246.87
KSZ8841-32MQL128PQFP0C to +70CTRAY9.638.027.296.746.39
KSZ8841-32MVL128LQFP0C to +70CTRAY9.948.287.536.966.60
KSZ8841-PMQL128PQFP0C to +70CTRAY9.638.027.296.746.39
KSZ8841-PMQLI128PQFP-40C to +85CTRAY10.568.808.007.397.01
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RoHS Information
PartNumberDeviceWeightShippingWeightLeadCountPackageTypePackageWidthSolderCompositionJEDECIndicatorRoHSChinaEFUP
KSZ8841-16MVL0.7410008.888889128LQFP14x14x1.4mmMatte Tine3
KSZ8841-16MVL-TR0.7410001.428000128LQFP14x14x1.4mmMatte Tine3
KSZ8841-16MVLI0.7410008.888889128LQFP14x14x1.4mmMatte Tine3
KSZ8841-16MVLI-TR0.7410001.428000128LQFP14x14x1.4mmMatte Tine3
KSZ8841-32MVL0.7410008.888889128LQFP14x14x1.4mmMatte Tine3
KSZ8841-32MVLI0.7410008.888889128LQFP14x14x1.4mmMatte Tine3
KSZ8841-16MBLI1.375000100LFBGA10x10x1.42mmSACe8
KSZ8841-16MBL1.375000100LFBGA10x10x1.42mmSACe8
KSZ8841-PMQLI1.7615004.015152128PQFP14x20x2.72mmMatte Tine3
KSZ8841-16MQL1.7615004.015152128PQFP14x20x2.72mmMatte Tine3
KSZ8841-PMQL1.7615004.015152128PQFP14x20x2.72mmMatte Tine3
KSZ8841-32MQL1.7615004.015152128PQFP14x20x2.72mmMatte Tine3
KSZ8841MQL Data Sheet KSZ8841
KSZ8841-PMQL Data Sheet KSZ8841
AN2157 LAN9353
Micrel AN 109 KSZ8995
Micrel AN 114 KSZ8999
Micrel AN 115 KSZ8842
Micrel AN 116 KSZ8841
Micrel AN 138 KSZ8842
Micrel AN 142 KSZ8841
Micrel AN 24 KSZ8999
Micrel AN 25 KSZ8999
Micrel AN 27 KSZ8999
Micrel AN 3 KSZ8842
Micrel AN 31 KSZ8999
Micrel AN 32 KSZ8997
Micrel AN 44 KSZ8997
Micrel AN 45 KSZ8993
Micrel AN 77 KSZ8841
Micrel AN 8 KSZ8999
Micrel AN 81 KSZ8895
Micrel AN 84 KSZ8862
Micrel AN 89 KSZ8842
Micrel AN 91 KSZ8999
KSZ8841MQL_V1.4_HP.zip KSZ8841
KSZ8841PMQL_V1.5_DP.zip KSZ8841
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