KSZ8842-16M/-32M
Two-Port Ethernet Switch with Non-PCI Interface
• Per Port-Based, Software Power-Save on PHY
(Idle Link Detection, Register Configuration Pre-
served)
Features
Switch Management
• Non-Blocking Switch Fabric Assures Fast Packet
Delivery by Utilizing a 1K Entry Forwarding Table
and a Store-and-Forward Architecture
• Single Power Supply: 3.3V
• Commercial Temperature Range: 0°C to +70°C
• Industrial Temperature Range: –40°C to +85°C
• Fully Compliant with IEEE 802.3u Standards
• Available in 128-pin PQFP, 100-ball LFBGA, and
128-pin LQFP
• Full-Duplex IEEE 802.3x Flow Control (Pause)
with Force Mode Option
• Available in -16 Version for 8/16-Bit Bus Support
and -32 version for 32-Bit Bus Support
• Half-Duplex Back Pressure Flow Control
Advanced Switch Management
Additional Features
• IEEE 802.1Q VLAN Support for Up to 16 Groups
(Full Range of VLAN IDs)
In Addition to Offering All of the Features of an Inte-
grated Layer-2 Managed Switch, the KSZ8842M
Offers:
• VLAN ID Tag/Untag Options, on a Per Port Basis
• IEEE 802.1p/Q Tag Insertion or Removal on a Per
Port Basis (Egress)
• Repeater Mode Capabilities to Allow for Cut
Through in Latency Critical Industrial Ethernet or
Embedded Ethernet Applications
• Programmable Rate Limiting at the Ingress and
Egress Ports
• Dynamic Buffer Memory Scheme
• Broadcast Storm Protection
- Essential for Applications Such as Video over
IP where Image Jitter is Unacceptable
• IEEE 802.1d Spanning Tree Protocol Support
• MAC Filtering Function to Filter or Forward
Unknown Unicast Packets
• 2-Port Switch with a Flexible 8-Bit, 16-Bit, or 32-
Bit Generic Host Processor Interfaces
• Microchip LinkMD® Cable Diagnostic to Deter-
mine Cable Length, Diagnose Faulty Cables, and
Determine Distance to Fault
• Direct Forwarding Mode Enabling the Processor
to Identify the Ingress Port and to Specify the
Egress Port
• Internet Group Management Protocol (IGMP) v1/
v2 Snooping Support for Multicast Packet Filtering
• Hewlett Packard (HP) Auto-MDIX Crossover with
Disable and Enable Options
• IPV6 Multicast Listener Discovery (MLD) Snoop-
ing Support
• Four Priority Queues to Handle Voice, Video,
Data, and Control Packets
• Ability to Transmit and Receive Frames up to
1916 bytes
Monitoring
• Port Mirroring/Monitoring/Sniffing: Ingress and/or
Egress Traffic to Any Port
Applications
• MIB Counters for Fully Compliant Statistics Gath-
ering - 34 MIB Counters Per Port
• Video Distribution Systems
• High-End Cable, Satellite, and IP Set-Top Boxes
• Video over IP
• Loopback Modes for Remote Failure Diagnostics
Comprehensive Register Access
• Voice over IP (VoIP) and Analog Telephone
Adapters (ATA)
• Control Registers Configurable On-the-Fly (Port-
Priority, 802.1p/d/Q)
• Industrial Control in Latency Critical Applications
• Motion Control
QoS/CoS Packets Prioritization Support
• Industrial Control Sensor Devices (Temperature,
Pressure, Levels, and Valves)
• Per Port, 802.1p and DiffServ-Based
• Remapping of 802.1p Priority Field on a Per Port
Basis
• Security and Surveillance Cameras
Markets
Power Modes, Packaging, and Power Supplies
• Fast Ethernet
• Full-Chip Hardware Power-Down (Register Con-
figuration not Saved) Allows Low Power Dissipa-
tion
• Embedded Ethernet
• Industrial Ethernet
2020 Microchip Technology Inc.
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