BCM5208(2004) Ver la hoja de datos (PDF) - Broadcom Corporation
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BCM5208 Datasheet PDF : 2 Pages
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BCM5226
®
10/100BASE-TX/FX HEX-Φ™ TRANSCEIVER
FEATURES
SUMMARY OF BENEFITS
• Single-chip six-port Fast Ethernet transceiver
• HP Auto-MDIX
• Low-power 2.5V CMOS technology
• Compatible with 2.5V I/O and 3.3V I/O
• Reduced Media Independent Interface (RMII)
• Serial Media Independent Interface (SMII)
• Fully integrated digital adaptive equalization
• On-chip multimode transmit waveshaping
• Edge-rate control eliminates external filters
• Integrated baseline wander correction
• Full-duplex support
• Twisted-pair or fiber support on any or all ports
• Interrupt output capability
• Loopback mode for diagnostics
• 160-pin PQFP (BCM5226R)
• 128-pin PQFP (BCM5226S)
• Proven Broadcom proprietary DSP Digi-Φ™ architecture
• Target usage: Fast Ethernet switches.
• Low power < 300 milliwatts per port.
• Auto-MDIX detects and corrects cabling errors.
• Provides robust performance over a broad range of operating
conditions.
• Single-chip device contains six independent Fast Ethernet
transceivers.
• Performs all physical layer interface functions for 100BASE-
TX full-duplex or half-duplex Ethernet on Category 5 twisted-
pair cable and 10BASE-T full- or half-duplex Ethernet on
Category 3, 4, or 5 cable.
• Permits transmission over fiber-optic cabling when paired
with an external fiber-optic transceiver.
• Compliant with IEEE 802.3 standard.
• IEEE 1149.1 (JTAG) scan chain support.
Quad BCM5208 Versus HEX BCM5226 Comparison
6 Active PHY components
+ 6 MACs including switch fabric
4 Active SMII PHY components
+ SMII MACs embedded in switch chip
Switch Fabric and System Logic
QUAD MAC
QUAD MAC
24x16=384 MII Pins
BCM5208
Port 1
BCM5208
Port 24
Switch Fabric with Embedded MACs
24x2=48 SMII Pins
BCM5226 BCM5226 BCM5226 BCM5226
Port 1
Port 24
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