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KSZ8842

2-Port 10/100 Managed Ethernet Switch

Status: Not Recommended for new designs

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
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Overview
Documents
Development Environment
Similar Devices
RoHS Information
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Device Overview

Summary

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 LANCheck online design review service is subject to Microchip's Program Terms and Conditions and requires a myMicrochip account.

Please consider this device KSZ8852

Additional Features
      Switch Management
      • 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
      Advanced Switch Management
      • 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
    Comprehensive Register Access
    • 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.)
    QoS/CoS Packets Prioritization Support
    • Per port, 802.1p and DiffServ based
    • Re-mapping of 802.1p priority field on a per port basis
    Power Modes, Packaging, and Power Supplies
    • 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
Parametrics
Name
Value
Description
2-Port 10/100 Ethernet Switch with Generic Interface
Ethernet Bandwidth
10/100Mbps
MAC
3
PHY
2
TX/RX RAM Buffer(Bytes)
4KB
Interrupt Pin
Yes
LEDs
6
Op. Voltage (V)
3.3
Interface
Host Bus/PCI
Temp. Range Min. (°C)
-40
Temp. Range Max. (°C)
85
Automotive
Yes
Managed
Yes
Copper Support
10/100 (2)
8/16-bit
Yes
32-bit
Yes
PCI
Yes
Supply Voltage (V)
3.3
Internal LDO
Yes
Vdd I/O (V)
3.3/5.0
LinkMD Cable Diag
Yes
Repeater Mode
Yes
ESD Rating (KV)
n/a
Smart Power Adjust
n/a
Largest Pkt-Size Bytes
1916
IPV6
Yes
# of VLAN
16
Flow Ctrl
Yes
Rate Limiting
Yes
Static MAC Addr
Yes

Documents

Jump to:

Design Guides

02/19/2016
4813KB
02/19/2016
3916KB

IBIS

05/10/2017
257KB
05/10/2017
257KB

Software Library

Development Environment

  • Software Libraries
Software Libraries
Driver is located in Linux Kernel

The driver for this device resides in the Linux Kernel found here https://www.kernel.org/

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RoHS Information

Part Number
Device Weight (g)
Shipping Weight (Kg)
Lead Count
Package Type
Package Width
Solder Composition
JEDEC Indicator
RoHS
China EFUP
KSZ8842-16MBLI
1.375000
100
LFBGA
10x10x1.42mm
SAC405
e1
KSZ8842-16MBLI-TR
0.808000
100
LFBGA
10x10x1.42mm
SAC405
e1
KSZ8842-PMBL
0.124700
0.907692
100
LFBGA
9x9x1.38mm
SAC305
e1
KSZ8842-PMBL-TR
0.124700
0.798000
100
LFBGA
9x9x1.38mm
SAC305
e1
KSZ8842-16MBL
1.375000
100
LFBGA
10x10x1.42mm
SAC405
e1
KSZ8842-16MVL
0.741000
8.888889
128
LQFP
14x14x1.4mm
Matte Tin
e3
KSZ8842-16MVLI
0.741000
8.888889
128
LQFP
14x14x1.4mm
Matte Tin
e3
KSZ8842-16MVLI-TR
0.741000
1.428000
128
LQFP
14x14x1.4mm
Matte Tin
e3
KSZ8842-16MVL-TR
0.741000
1.428000
128
LQFP
14x14x1.4mm
Matte Tin
e3
KSZ8842-32MVL
0.741000
8.888889
128
LQFP
14x14x1.4mm
Matte Tin
e3
KSZ8842-32MVLI
0.741000
8.888889
128
LQFP
14x14x1.4mm
Matte Tin
e3
KSZ8842-16MQL
1.761500
4.015152
128
PQFP
14x20x2.72mm
Matte Tin
e3
KSZ8842-32MQL
1.761500
4.015152
128
PQFP
14x20x2.72mm
Matte Tin
e3
KSZ8842-PMQL
1.761500
4.015152
128
PQFP
14x20x2.72mm
Matte Tin
e3
KSZ8842-PMQLI
1.761500
4.015152
128
PQFP
14x20x2.72mm
Matte Tin
e3
To see a complete listing of RoHS data for this device, please Click here
Shipping Weight = Device Weight + Packing Material weight. Please contact sales office if device weight is not available.

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