bcm54980 Broadcom Corp., bcm54980 Datasheet
bcm54980
Manufacturer Part Number
bcm54980
Description
Bcm54980 - Octal-port 10/100/1000base-t Gigabit Copper Transceiver
Manufacturer
Broadcom Corp.
Datasheet
1.BCM54980.pdf
(2 pages)
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OCTAL-PORT 10/100/1000BASE-T GIGABIT ETHERNET TRANSCEIVER
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Eight 10BASE-T/100BASE-TX/1000BASE-T Gigabit
Ethernet (GbE) transceivers in a single fully integrated 90-nm
CMOS chip
Reverse MDI capability
Low power: 500 mW per port
SGMII and SerDes MAC interface options
Internal 100Ω twisted-pair termination resistors
Supports 10/100/1000BASE-T and 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
Ethernet@Wirespeed™ and Super-Isolate mode support
F E A T U R E S
®
BCM54980 System Diagram
10/100/1000BASE-T
Gigabit Ethernet
BCM54980
Transceiver
BCM54980
BCM54980
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Energy efficient, low-cost, and low-power octal-port
integration enables single-row, high-port density switches
Ability to reverse MDI, easing board design and simplifying
layout in high port density switch designs
Low-cost solution for 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 standard devices operating
at 10 Mbps, 100 Mbps, and 1000 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
Ease of manufacturing with JTAG support, simplified power
supply, and multiple MAC interfaces
- CableChecker detection of cable plant impairments
- Prevents erroneous equipment return due to bad cable
- Prevents manufacturing fallout due to bad cable plants
S U M M A R Y O F B E N E F I T S
plants
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bcm54980 Summary of contents
Page 1
... Prevents manufacturing fallout due to bad cable plants • Operates with larger packets for wider range of packet- protocol support and improved efficiency • Ease of manufacturing with JTAG support, simplified power supply, and multiple MAC interfaces BCM54980 System Diagram BCM54980 BCM54980 10/100/1000BASE-T Gigabit Ethernet Transceiver ...
Page 2
... GbE switches, and the BCM54980 has the smallest footprint and lowest power in the industry at less than 500 mW per port. In addition, the BCM54980 has extremely low EMI emissions, which reduces the design constraints required to meet EMI radiation specifications. The BCM54980 provides the highest level of external component integration in the smallest possible package, resulting in a PBC space savings of 40% for high-density switch applications ...