Communication ICs

The Broadcom BCM5325 device is a highly integrated solution. It combines all of the functions of a high-speed switch system- including packet buffer, PHY transceivers, media access controllers, address management, and a nonblocking switch fabric-into a single 0.18µ CMOS device. It complies with the IEEE 802.3, 802.3u, and 802.3x specifications, including the MAC control PAUSE frame and auto-negotiation subsections, providing compatibility with all industry-standard Ethernet and Fast Ethernet devices.This device contains five full-duplex 10BASE-T/100BASE-TX Fast Ethernet transceivers, each of which performs all of the physical layer interface functions for 10BASE-T Ethernet on Category 3, 4, or 5 Unshielded Twisted-Pair (UTP) cable and 100BASE-TX Fast Ethernet on Category 5 UTP cable.E2PROM interfaces provide easy programming of the 802.1p QoS queues. This allows switch traffic to be given different classes of priority or service, for example, voice traffic for IP phone applications, video traffic for multimedia applications, or data traffic for e-mail applications.

• The highest level of silicon integration achieved for a five-port 10/100 Ethernet switch device
• Fourth generation switch on a chip
• The BCM5325 integrates:
  • Five transceivers (802.3u compliant)
  • Six media access controllers (802.x compliant)
  • 128-KB packet buffer
  • Non-blocking switch fabric
• Packet classification 802.1p QoS priority queues
• Port-based VLAN
• MII or 7-wire interface supports an additional 100FX or 100TX connection enabling a sixth user connection or uplink
• Supports up to 2K MAC addresses
• Flow control: full-duplex (802.3x) and half-duplex options supported
• Supports automatic address learning and BROng
• Internal oscillator circuit
• Typical power consumption: < 1.4W
• 128-pin PQFP package