bcm54880 Broadcom Corp., bcm54880 Datasheet - Page 2

• Manufacturer Part Number: bcm54880
• Description: Bcm54880 - Octal-port 10/100/1000base-t Gigabit Copper Broadr-reach Transceiver
• Manufacturer: Broadcom Corp.

The BCM54880 is the first member of Broadcom’s 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 hotels, colleges/
universities, convention centers, airports, train stations, to name a few).
The extended reach will also broaden the range of cable installations and
can be used for new IP services and applications such as broadband
access, voice over IP, wireless access points, and surveillance cameras.
In contrast to previous technologies that extended the range of Ethernet
over twisted pair, Broadcom’s new approach 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 to 500 meters. Additionally, BroadR-Reach
technology works in Power over Ethernet-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 will not support
standard IEEE 802.3 Ethernet PHY technology, BroadR-Reach would
Broadcom
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BROADCOM CORPORATION
5300 California Avenue
Irvine, California 92617
© 2007 by BROADCOM CORPORATION. All rights reserved.
54880-PB00-R
®
, the pulse logo, Connecting everything
05/18/07
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}±
RDAC [2:1]
®
®
, the Connecting everything logo, and
Correction
Negotiation
Generator
Baseline
Wander
PGA
Auto-
Bias
TX DAC
ADC
O V E R V I E W
Block Diagram
Registers
Canceller
Recovery
Timing &
Phase
Echo
FFE
MII
be 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 over one single 500-meter telephone-
grade twisted-pair cable or the rate of 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.
Canceller
Decoder
Control
XTALK
MGMT
Trellis
DFE/
MII
Generator
Interface
Interface
SGMII
Clock
LED
SGIN {8:1}±
SGOUT {8:1}±
LED[4:1] {8:1}/
SLED[32:1]
SLED_CLK
SLED_STRB
SLED_IN
MDIO [2:1]
MDC [2:1]
Modes
REFCLK2+
REFCLK1+
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Fax: [phone]
E-mail: [e-mail]
Web: www.broadcom.com