BCM5208 データシートの表示（PDF） - Broadcom Corporation
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BCM5208 Datasheet PDF : 1 Pages
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BCM5208
PRODUBCrTief
BCM5208 10/100BASE-TX QUAD-Φ™ TRANSCEIVER
BCM5208 FEATURES
• The Broadcom® BCM5208 is a Quad-Φ 10/100BASE-
T Transceiver that contains four 10BASE-T/100-
BASE-TX transceivers
• 10BASE-T/100BASE-TX/FX 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
• Carrier Integrity Monitor on Each Port
• Port Switching for Multisegment Repeaters
• MII Repeater Mode Support in All Modes
• LED Status Pins
• Loop-back Mode for Diagnostics
• IEEE 1149.1 (JTAG) Support
• 3.3V Power Supply
• 208-Pin PQFP Package
SUMMARY OF BENEFITS
• Fully-integrated TX/FX Quad PHY Transceiver (MII
to TX Magnetics/FX Optics)
• Increases system port density
• 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 or 100BASE-FX full-
duplex
• Suited for both Ethernet switch and repeater products
• Digital Adaptive Equalization and Clock Recovery
• Increases SNR by 3dB over ideal analog equalizers
• Robust performance in harsh noise environments and
over sub-standard cable
• Immune to on-chip noise and crosstalk
• Insensitive to variations in process, temperature
and voltage
24-Port 10/100BASE-T Ethernet Switch Example
BCM5208
10/100BASE-TX
QUAD-ΦTM
Transceiver
BCM5208
10/100BASE-TX
QUAD-ΦTM
Transceiver
MAC
MAC
MAC
MAC
MAC
MAC
MAC
MAC
Switching
Engine
Switch Module
MP Memory
Logic
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