BCM54880
®
OCTAL 10/100/1000BASE-T GIGABIT ETHERNET B
ROAD
R-R
EACH
™
TRANSCEIVER
FEATURES
•
Eight 10BASE-T/100BASE-TX/1000BASE-T Gigabit
Ethernet (GbE) and BroadR-Reach™ transceivers in a single
fully integrated 65 nm CMOS chip
SUMMARY OF BENEFITS
•
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, or four pairs of either CAT5 or telephony grade cables
•
Full-duplex operation at the rate of 100 Mbps and 10 Mbps
over one, two, and four pairs of unshielded twisted pair cable
up to 1000m, depending on cable quality
•
Each port individually configurable as BroadR-Reach 10/100
or standard Ethernet 10/100/1000
•
Full-duplex and 10 Mbps and 100 Mbps operation over point-
to-point coax cable
•
Low-cost solution for service providers access switches and
enterprise/SMB managed and unmanaged switch
applications
•
SGMII and SerDes MAC interface options
•
Internal 100Ω twisted-pair termination resistors
•
Supports 10/100/1000BASE-T and 100BASE-FX on copper
interface
•
Lowers system BOM cost and simplifies system design
•
Internal 100Ω twisted-pair termination resistors eliminate
need for external resistors, saving eight resistors per port.
•
Enhanced LED driver modes
•
Fully compliant with IEEE 802.3™, IEEE 802.3u, and
IEEE 802.3ab standards
•
Provides compatibility with IEEE 802.3 standard devices
operating at 10 Mbps, 100 Mbps, and 1000 Mbps at half-
duplex and full-duplex
•
Line-side loopback
•
Low EMI emissions
•
Hardware-accelerated CableChecker™ diagnostics
•
Robust cable-sourced electrostatic discharge (CESD)
tolerance
•
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
•
Support for jumbo packets
•
IEEE 1149.1 (JTAG) and 1149.6 (AC-JTAG) boundary scan
BCM54880 System Diagram
10/100/1000 Mbps
Ethernet Switch
BCM54880
10/100/1000BASE-T
Gigabit Ethernet
Transceiver
2x8 RJ-45s
BCM54880
with integrated magnetics
OVERVIEW
BCM54880
TX DAC
TRD [3:0] {8}±
TRD [3:0] {7}±
TRD [3:0] {6}±
TRD [3:0] {5}±
TRD [3:0] {4}±
TRD [3:0] {3}±
TRD [3:0] {2}±
TRD [3:0] {1}±
SGIN {8:1}±
SGOUT {8:1}±
Baseline
Wander
Correction
Echo
Canceller
FFE
PGA
ADC
Timing &
Phase
Recovery
XTALK
Canceller
SGMII
Interface
DFE/
Trellis
Decoder
LED
Interface
LED[4:1] {8:1}/
SLED[32:1]
SLED_CLK
SLED_STRB
SLED_IN
Auto-
Negotiation
MII
MGMT
Control
MDIO [2:1]
MDC [2:1]
MII
Registers
RDAC [2:1]
Bias
Generator
Modes
Clock
Generator
REFCLK2+
REFCLK1+
BCM54880 Block Diagram
The BCM54880 is a member of the Broadcom GbE BroadR-Reach
family of copper PHY products. It includes eight complete 10/100/1000
BASE-T and BroadR-Reach transceivers integrated on a single 65 nm
CMOS chip. The BCM54880 includes eight SGMII serial media access
controller interfaces and eight copper ports, whereby each copper port
supports one, two, or four twisted-pair line connections.
BroadR-Reach technology supports both 100-meter traditional Ethernet
services and other applications that require longer than 100-meter reach or
operation over a single twisted wire pair (such as FTTC/FTTB in MTU/
MDU as well as hotels). The extended reach also broadens the range of
cable installations and can be used for new IP services and applications
such as broadband access, voice over IP (VoIP), wireless access points,
and surveillance cameras.
Building on technologies that extend the range of Ethernet over twisted
pair, Broadcom technology enables every BroadR-Reach port to also
support IEEE 802.3-compliant technologies such as 10BASE-T,
100BASE-TX, and 1000BASE-T. As a result, BroadR-Reach guarantees
interoperability and connectivity to standard 10/100/1000BASE-T devices
over distances up to 100 meters while extending 10/100 operations over
one, two, or four pairs of UTP cable for a distance of more than 1000m,
depending on the quality of the cable and number of pairs used.
Additionally, BroadR-Reach technology works in Power over Ethernet
(PoE)-enabled platforms, providing a new generation of IP services and
applications such as security camera surveillance.
BroadR-Reach technology addresses key issues that affect deployment of
IP services in today’s enterprise. For example, since many traditional
digital PBX phone systems use twisted-pair cables that do not support
®
standard IEEE 802.3 Ethernet PHY technology, BroadR-Reach is a good
solution for migrating to IP-based telephony systems by leveraging the
current infrastructure. Also, in new installations, some devices such as
wireless access points (WAPs) and surveillance cameras may not be
conveniently located within the standard 100-meter range of horizontal
wiring in structured cabling systems. For these applications, BroadR-
Reach provides IT managers with additional flexibility in connecting
devices over distances that would otherwise require fiber-optic cabling
and expensive optical transceivers.
When in BroadR-Reach mode of operation, the BCM54880 can operate
full-duplex at the rate of 10 Mbps and 100 Mbps over four-pair CAT5
twisted-pair wiring.
The BCM54880 also features advanced hardware-accelerated cable-
checker diagnostic software that detects cable length or cable plant
impairments. The information obtained from the diagnostic software can
be used in conjunction by the OEM software and has the intelligence to
automatically put the BCM54880 in either BroadR-Reach mode or normal
Ethernet mode of operation.
The BCM54880 architecture not only meets the requirements of IEEE
802.3, IEEE 802.3u, and IEEE 802.3ab, but also maintains the industry’s
highest level of margin over IEEE requirements for echo, near-end
crosstalk (NEXT), and far-end crosstalk (FEXT).
Since BroadR-Reach ports also support standard 10/100/1000BASE-T
configurations, system vendors can easily offer upgraded products with no
compromise to the features, performance, and interoperability of their
existing switch technology.
Broadcom
®
, the pulse logo,
Connecting everything
®
, the Connecting everything logo,
CableChecker™, and BroadR-Reach™ are among the trademarks of Broadcom Corporation and/or its
affiliates in the United States, certain other countries and/or the EU. Any other trademarks or trade names
mentioned are the property of their respective owners.
®
BROADCOM CORPORATION
5300 California Avenue
Irvine, California 92617
© 2009 by BROADCOM CORPORATION. All rights reserved.
54880-PB01-R
09/28/09
Phone: 949-926-5000
Fax: 949-926-5203
E-mail: info@broadcom.com
Web: www.broadcom.com
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