bcm54881 Broadcom Corp., bcm54881 Datasheet
bcm54881
Manufacturer Part Number
bcm54881
Description
Octal 10/100base-tx Ethernet Broadr-reach Transceiver
Manufacturer
Broadcom Corp.
Datasheet
1.BCM54881.pdf
(2 pages)
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OCTAL 10/100BASE-TX ETHERNET BroadR-Reach™ TRANSCEIVER
Eight 10BASE-T/100BASE-TX and BroadR-Reach™
transceivers in a single fully integrated 65 nm CMOS chip
Full duplex operation at the rate of 10 Mbps and 100 Mbps
over one, two, and four pair of unshielded twisted pair cable up
to 1000m, depending on cable quality.
Full duplex 100 Mbps and 10 Mbps operation over
point-to-point coax cable
S3MII interface
Internal 100Ω twisted pair termination resistors
Supports 100BASE-FX on copper interface
Enhanced LED driver modes
Fully compliant with IEEE 802.3™, IEEE 802.3u, and
IEEE 802.3ab standards
Line-side loopback
Low EMI emissions
Hardware-accelerated CableChecker™ diagnostics
Robust cable-sourced electrostatic discharge (CESD)
tolerance
Support for jumbo packets
IEEE 1149.1 (JTAG) and 1149.6 (AC-JTAG) boundary scan
F E A T U R E S
®
BCM54881 System Diagram
BroadR-Reach Ethernet
BCM54881
10/100BASE-TX
BCM54881
Transceiver
BCM54881
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Low-cost, and low-power 8-port integration enables
single-row, high-port density switches.
Enables new IP services that require extended reach over one,
two, and four pairs of either CAT5 or telephony grade cables
Each port individually configurable as BroadR-Reach 10/100
or standard Ethernet 10/100
Low-cost solution for service provider access switches and
enterprise/SMB managed and unmanaged switch
applications
Lowers system BOM cost and simplifies system design
Internal 100Ω twisted pair termination resistors eliminate
need for external resistors, saving eight resistors per port.
Provides compatibility with IEEE 802.3 standard devices
operating at 10 Mbps and 100 Mbps, at half-duplex and
full-duplex
Eases system-level debug
Enables use of low-cost magnetics, even in high-density (48+)
designs
CableChecker characterizes cable plant condition and
immediately indicates cabling issues.
Operates with larger packets for wider range of packet
protocol support and improved efficiency
S U M M A R Y O F B E N E F I T S
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bcm54881 Summary of contents
Page 1
... Enables use of low-cost magnetics, even in high-density (48+) designs • CableChecker characterizes cable plant condition and immediately indicates cabling issues. • Operates with larger packets for wider range of packet protocol support and improved efficiency BCM54881 System Diagram BCM54881 BCM54881 10/100BASE-TX BroadR-Reach Ethernet Transceiver ...
Page 2
... CableChecker diagnostic software that detects cable length or cable plant impairments. The information obtained from the diagnostic software can be used in conjunction with the OEM software and has the intelligence to automatically put the BCM54881 in either BroadR-Reach mode or normal Ethernet mode of operation. The BCM54881 architecture not only meets the requirements of IEEE 802.3, IEEE 802.3u, and IEEE 802.3ab, but also maintains the industry’ ...