BCM5208R
®
BCM5208R 10/100BASE-TX QUAD-F™ TRANSCEIVER
24-Port 10/100BASE-T Ethernet Switch Example
• 10BASE-T/100BASE-TX IEEE 802.3u-compliant
Full-duplex support in all modes
IEEE 802.3u-compliant auto-negotiation
Media Independent Interface (MII) for each port
Shared MII serial management interface
Fully integrated digital adaptive equalizers
125-MHz clock generator and timing recovery
Integrated multimode transmit wave shaping
Integrated baseline wander correction
LED status pins
Loopback mode for diagnostics
IEEE 1149.1 (JTAG) support
3.3V power supply
208-pin PQFP package
Switching
Engine
MAC
Logic
MP Memory
Switch Module
MAC
MAC
MAC
MAC
MAC
MAC
MAC
BCM5208R
10/100BASE-TX
QUAD-Φ
TM
Transceiver
BCM5208R
10/100BASE-TX
QUAD-Φ
TM
Transceiver

Fully integrated TX quad PHY transceiver (MII to TX
magnetics optics)
Decreases system cost per port
Simplifies system and board design
Reduces power consumption

On-chip multimode transmit wave shaping
Eliminates need for external filters
Minimizes EMI

Flexible Ethernet PHY solution
10BASE-T, 100BASE-TX full-duplex
Suited for Ethernet switch products

Digital adaptive equalization and clock recovery
Increases SNR by 3 dB over ideal analog equalizers
Robust performance in harsh noise environments and over
substandard cable
Immune to on-chip noise and crosstalk
Insensitive to variations in process, temperature, and voltage

Cost reduction for BCM5208 designs
FEATURES SUMMARY OF BENEFITS