10/100BASE-TX/FX Transceiver
The Broadcom BCM5248 is a single-chip device containing eight independent Fast Ethernet transceivers. Each performs all the physical layer functions for 100BASE-TX full- or half-duplex Ethernet on Category 5 UTP cable and 10BASE-T full- or half-duplex Ethernet on Category 3, 4, or 5 UTP cable. The BCM5248 chip performs encoding and decoding, clock and data recovery, digital adaptive equalization, line transmission, carrier sense and link integrity monitoring, autonegotiation and SMII/SSSMII management functions. The BCM5248 is compliant with the IEEE 802.3 standard.
The BCM5248 offers alternative connection to fiber optic modules for 100BASE-FX operation. The Enhanced FX mode allows 100BASE-FX operation without the use of Signal Detect pins. The standard FX mode allows 100BASE-FX operation with modules that require the PHY to use Signal Detect inputs to disable receive data in the absence of a received optical signal.
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- Product Brief
BCM5248
- Eight-port 10BASE-T / 100BASE-TX / 100BASE-FX transceiver
- Cable Auto-Check™ diagnoses and pinpoints cable faults
- Target usage: Fast Ethernet switches
- Lower power per port: < 2 milliwatts per port
- Product Brief
BCM5248
