GENERAL DESCRIPTION
ACD81024 is a single chip system integration of an entire 24 port Ethernet switch, specifically designed for networks compliance with IEEE 802.3 10Base-T standard. All active components of a 24 port Ethernet switch system, including the 10BASE-T transceivers, clock and data recovery circuitry, Manchester ENDEC, Media Access Control logic, Lookup Engine, Switch Fabric, and Switch Control logic are all integrated into a single semiconductor chip. ACD81024 can be used to build a desktop class 10BASE-T Ethernet switch system with very low cost and very short time-to-market cycle. To build a marketable Ethernet switch system using ACD81024 requires no more than a DC power supply,
EMI/RFI filter/transformer modules, RJ45 connectors, LEDs, and LED drivers.

MAIN FEATURES
• Single chip integration of a Ethernet switch system
• Supports 24 10Base-T ports
• Very short time-to-market cycle
• No need of external memory
• No need of external glue logic
• Built-in 10BASE-T transceiver
• Built-in clock and data recovery circuitry
• Smart squelch intelligence
• Polarity detection and correction
• Link integrity pulse detection and generation
• Manchester ENDEC
• Media Access Control logic
• FCS verification
• Storage of one MAC address per port
• Lookup Engine
• Non-blocking Switching Fabric
• Fabric Control logic
• Back-pressure congestion control
• Automatic MAC address learning
• Cut-through switching mode with constant low latency < 16 us
• LED display of each port’s Link Status, Transmit, Receive, Collision, Congestion, Jabber, and FCS Error indication
• One expansion port for connecting with other interconnection devices
• Line speed forwarding rate
• 208 pin PQFP package with built-in Heat-Sink
• Single 5V power supply