2-PORT 10/100 SWITCH/REPEATER W/ GENERIC 8/16-BIT BUS I/F

The KSZ8842-series of 2-port switches includes PCI and non--PCI CPU interfaces, and are available in 8/16-bit and 32-bit bus designs.The KSZ8842M is the industry"s first fully managed, 2- port switch with a non--PCI CPU interface. It is based on a proven, 4th generation, integrated Layer-2 switch, compliant with IEEE 802.3u standards.The KSZ8842M can be configured as a switch or as a low-latency (= 310 nanoseconds) repeater in latency critical, embedded or industrial Ethernet applications. For industrial applications, the KSZ8842M can run in half-duplex mode regardless of the application.The KSZ8842M 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 KSZ8842M contains: Two 10/100 transceivers with patented, mixed-signal, low-power technology, two 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.

• non--blocking switch fabric assures fast packet delivery by utilizing a 1K entry forwarding table
• 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, on a 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 ports
• Broadcast storm protection
• IEEE 802.1d spanning tree protocol support
• MAC filtering function to filter or forward unknown unicast packets
• 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
• IPV6 Multicast Listener Discovery (MLD) snooping support
• Full-chip hardware power-down (register configuration not saved) allows 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