BCM5248
®
10/100BASE-TX OCTAL-Φ™ TRANSCEIVER
FEATURES
• Eight-port 10BASE-T / 100BASE-TX / 100BASE-FX
transceiver
• Cable Auto-CheckTM diagnoses and pinpoints cable faults
• HP Auto-MDIX automatically uncrosses cable pairs
• Advanced cable diagnostics reduce support calls and lower cost
of ownership
• Optimized for use with Broadcom's StrataSwitch TM Family
• Cost-effective process technology: 0.18u CMOS
• Serial Media Independent Interface (SMII) and Source
Synchronous SMII (SSSMII)
• Fully programmable LED drivers and serial LED output
• Low power: 200mW per Port
• Low voltage core: 1.8V
• QFP or BGA package options
• Most widely deployed and reliable PHY architecture: Over
half a billion Digi-PHYTM ports shipped
SUMMARY OF BENEFITS
• Target usage: Fast Ethernet switches.
• Lower power per port: < 2 milliwatts per port.
• Smallest footprint per port available.
• Measures 14 mm x 20 mm for eight ports.
• Single-chip device contains eight independent Fast Ethernet
transceivers.
• Performs all physical layer interface functions for 100BASE-
TX full-duplex or half-duplex Ethernet on Category 5
unshielded twisted-pair (UTP) cable, 10BASE-T full or half-
duplex Ethernet on Category 3, 4, or 5 UTP cable, and
100BASE-FX full-duplex or half-duplex on fiber optic cable.
• Compliant with IEEE 802.3 standard.
• IEEE 1149.1 (JTAG) scan chain support.
• Fully customizable LED functions. Up to 8 LED signals per
port.
BCM5461
Gigabit
PHY
BCM5248
OCTAL-Φ
Quad
Magnetics
Quad
Magnetics
BCM5248
OCTAL-Φ
Quad
Magnetics
Quad
Magnetics
BCM5461
Gigabit
PHY
BCM5248
OCTAL-Φ
Quad
Magnetics
Quad
Magnetics
24-Port 10/100BASE-T Ethernet Switch Example