BCM5482
®
DUAL-PORT 10/100/1000BASE-T GIGABIT ETHERNET TRANSCEIVER
FEATURES
•
Dual-port integrated 10BASE-T/100BASE-TX/1000BASE-T
Gigabit Ethernet transceiver .
•
RGMII, SGMII, and SerDes MAC interface options.
•
1-Gbps line-side SerDes with RGMII MAC interface.
SUMMARY OF BENEFITS
•
Low-power, dual-port integration reduces design constraints
for space-constrained IP phone applications.
•
Compact solution for 10/100Base-TX uplink applications.
•
Provides compatibility with IEEE standard devices operating
at 10, 100, and 1000 Mbps at half-duplex and full-duplex.
•
Clock timing can be adjusted to eliminate board trace delays
required by the RGMII specification.
•
Lowers system BOM cost and simplifies system design.
•
Fully compliant with IEEE 802.3, IEEE 802.3u, and
IEEE 802.3ab standards.
•
0.13-micron CMOS—low power and cost.
•
Supports copper or fiber in RGMII mode.
•
Low power.
•
600 mW per port.
•
Advanced power management.
•
Trace-matched output impedance.
•
Line-side and MAC-side loopback.
•
Eases system level debugging.
•
Enables use of low-cost magnetics.
•
Cable diagnostic function characterizes cable plant condition
and immediately indicates cabling issues.
•
Prevents erroneous equipment return due to bad cable plants.
•
Prevents manufacturing fallout due to bad cable plants.
•
Allows immediate uptime at reduced speeds (100Base-TX or
10Base-T).
•
Over 3 kV of CESD tolerance prevents equipment damage and
return.
•
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.
•
Low EMI emissions.
•
CableChecker™ Diagnostics.
•
Cable plant analyzer function detects cable plant impairments.
•
Ethernet@WireSpeed.
•
Automatic MDI/MDIX crossover at all speeds.
•
Robust cable-sourced electrostatic discharge (CESD) tolerance.
•
Support for jumbo packets up to 10 kB.
•
IEEE 1149.1 (JTAG) boundary scan.
•
121-pin BGA package.
BCM5482 System Diagram
BCM5482
OVERVIEW
TX DAC
SYMBOL ENCODER
XTALK
CANCELLER
BASELINE
WANDER
CORRECTION
TRD[3:0]{2:1} +
FFE
PGA
AUTO-
NEGOTIATION
ADC
TIMING AND PHASE
RECOVERY
ECHO
CANCELLER
SERIAL/SGMII
DFE AND
TRELLIS
DECODER
SYMBOL DECODER/
ALIGNER
GTXCLK{2:1}
TXD[3:0]{2:1}
TX_EN{2:1}
SCLK(1){2:1} +
SGOUT(1){2:1} +
SGIN(1){2:1} +
RXD[3:0]{2:1}
RXC{2:1}
RX_DV{2:1}
XTAL1
XTAL0
RDAC
REGSUP[2:1]
REGCNTL[2:1]
REGSEN[2:1]
CLOCK
GENERATOR
BIAS GENERATOR
VOLTAGE
REGULATOR
MII REGISTERS
LED DRIVERS
LED[2:1]{2:1}
MII MGMT
CONTROL
MDC{2:1}
MDIO{2:1}
MODES
A member of Broadcom’s third generation of Gigabit Ethernet PHYs,
the
BCM5482
consists of two complete 10/100/1000BASE-T Gigabit
Ethernet transceivers integrated on a single monolithic CMOS chip. The
BCM5482
is optimized for low power and small footprint size to reduce
design complexity for space-constrained IP phone applications. For 10/
100BASE-TX applications, the single package offers a compelling
advantage over two single devices for Gigabit uplinks.
The
BCM5482
DSP-based architecture and advanced power
management techniques combine to achieve robust and low-power
operation over existing Category 5 twisted-pair wiring. The
BCM5482
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). With the industry's
lowest power at 600 mW per port, the
BCM5482
assists in reducing the
power distribution requirements of IP phone systems. In addition, the
BCM5482
has extremely low EMI emissions, which reduces the design
constraints required to meet EMI radiation specifications.
The
BCM5482
supports the RGMII, SGMII, and SerDes MAC
interfaces. The RGMII, SGMII, and serial SerDes inteerfaces are
reduced-pin-count (12, 6, and 4, respectively, versus 25) versions of the
GMII. The RGMII clock timing can be adjusted to eliminate the board
trace delays required by the RGMII specification. These reduced-pin-
count interfaces simplify design and lower system cost by reducing the
number of layers required for signal routing. In addition, these interfaces
allow fewer pins at the MAC/switch, which reduces the MAC/switch
cost by enabling smaller die sizes than would be possible with full GMII.
This device is another member of Broadcom’s 0.13-µm Gigabit Ethernet
copper PHY family, joining more than 25 other quad and single
products. The 0.13-µm process is the optimal process that offers the best
performance, lowest cost, and lowest power for Gigabit Ethernet copper
solutions. Broadcom continues to expand its leadership in 0.13-µm
technology with the
BCM5482,
part of its third generation of 0.13-µm
Gigabit Ethernet copper transceivers.
Each
BCM5482
port is fully independent and has individual interface,
control, and status registers, and incorporates a number of advanced
features. This includes identifying physical wiring defects that the
BCM5482
cannot automatically correct for, and channel conditions such
as excessive cable length and return loss, crosstalk, echo, and noise.
Broadcom’s cable analyzer software can be used with the device to
provide remote management of the cable and a first level of diagnostics
and fault isolation.
The
BCM5482
also has ESD tolerance that is well above typical industry
standards. This prevents ESD damage not only during manufacturing,
but also during CESD events in the field. The CESD is an ESD event that
occurs when an electrically charged network cable is plugged into a
network port. This is an issue becoming more prevalent with
contemporary cable installations. The
BCM5482
can tolerate over 3 kV
of CESD.
Broadcom
®
, the pulse logo,
QuadSquad™,
and
Connecting everything
®
are trademarks of Broadcom
Corporation and/or its subsidiaries in the United States and certain other countries. All other trademarks
mentioned are the property of their respective owners.
®
BROADCOM CORPORATION
16215 Alton Parkway, P.O. Box 57013
Irvine, California 92619-7013
© 2005 by BROADCOM CORPORATION. All rights reserved.
5482-PB00-R
4/29/05
Phone: 949-450-8700
Fax: 949-450-8710
E-mail: info@broadcom.com
Web: www.broadcom.com
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