BCM5434
PRODUCT
®
Brief
O F
B E N E F I T S
4-PORT GIGABIT COPPER TRANSCEIVER WITH SGMII & SERDES MAC INTERFACE
B C M 5 4 3 4
F E AT U R E S
S U M M A R Y
Four fully integrated
•
1000BASE-T Gigabit 10BASE-T/100BASE-TX/
Ethernet transceivers
•
SGMII and SerDes MAC Interface options
Fully compliant with IEEE 802.3, 802.3u, and 802.3ab
•
standards
•
0.13 um CMOS — low power and cost
•
Low power
Low power quad-port integration enables single-row,
•
high port density switches.
• Lowers system costs by eliminating PCB layers required for
routing high density solutions
• SGMII interface reduces I/O pin requirement over RGMII by
more than 50%.
• Lowers MAC/switch costs by reducing the number of pins
required to interface to the PHY.
•
Low EMI emissions
logic automatically selects
•
Ethernet@WireSpeed on channel conditions the
maximum speed based
•
Cable plant diagnostic
TM
• 1W per port
• Advanced power management
Provides
•
operatingcompatibility with IEEE standard devices
at 10, 100, and 1000 Mbps at half- and full-
•
•
•
•
•
Robust CESD tolerance
•
Support for jumbo packets up to 9 KB
•
IEEE 1149.1 (JTAG) boundary scan
• Cable plant analyzer function detects cable plant impairments
• Link quality indication LED
• Automatic detection and correction of wiring pair swaps, pair
skew, and pair polarity
• Automatic MDI/MDIX crossover at all speeds
duplex.
Requires no airflow or heatsink.
Reduces design constraints in high-density
applications that have higher EMI emissions.
Automatically configures the link to support the
highest possible speed based on link partner capability
and characteristics of the channel.
Cable diagnostic function characterizes cable plant
condition and immediately indicates cabling issues.
• Prevents erroneous equipment return due to bad cable plants.
• Prevents manufacturing fall-out due to bad cable plants.
High CESD
•
return. tolerance prevents equipment damage and
Operates with larger
wider range
•
protocol support and packets forefficiency. of packet
improved
Ease of manufacturing with JTAG support,
•
power supply, and multiple MAC interfaces.simplified
BCM5434 System Diagram
10/100/1000 Mbps
Ethernet Switch
BCM5434
BCM5434
10/100/1000BASE-T
Gigabit Ethernet Transceiver
2x8 RJ-45s
BCM5434
with integrated magnetics
BCM5434
B C M 5 4 3 4
O V E R V I E W
BCM5434 Block Diagram
16
TX DAC
Symbol
Encoder
XTALK
Canceller
X3
TRD [3:0]+ {1:4}*
Baseline
Wander
Correction
Echo
Canceller
MUX
PGA
ADC
FFE
DFE/
Trellis
Decoder
SerDes/
SGMI
Symbol
Decoder/
Aligner
SGIN+
SCLK+
SGOUT+
Auto-
Negotiation
XTALI
XTALO
RDAC {2:1}
Clock
Generator
Bias
Generator
Timing &
Phase
Recovery
MII
Registers
MII
MGMT
Control
MDC
MDIO
INTR
{1:4}*
MODES
*{1:4} Refers to the four separate Gigabit transceivers in the BCM5434
The
BCM5434
consists of four complete 10/100/1000BASE-T Gigabit
Ethernet transceivers integrated on a single monolithic CMOS chip. The
BCM5434
is optimized for low power and small footprint size to enable
high port density applications. By doubling transceiver port density,
lowering system cost, and reducing power dissipation by nearly 50%,
the
BCM5434
enables a new class of cost-effective Gigabit Ethernet
equipment, driving the delivery of Gigabit bandwidth to the desktop.
The
BCM5434’s
Digital Signal Processor based architecture and
advanced power management techniques combine to achieve robust and
low power operation over the existing CAT 5 twisted pair wiring. The
BCM5434
architecture not only meets the requirements of 802.3,
802.3u, and 802.3ab, but maintains the industry’s highest level of
margin over IEEE requirements for Echo, NEXT, and FEXT. Low
power is key to implementing high-density Gigabit switches, and at 1W
per port, the
BCM5434
enables twice the density of previous Gigabit
PHY transceivers. In addition, the
BCM5434
has extremely low EMI
emissions, which reduces the design constraints required to meet EMI
radiation specifications.
The
BCM5434
supports SGMII and Serdes MAC interfaces. The
serial SerDes and SGMII are reduced pin-count (4 and 6 respectively)
Switch/MAC interfaces. These reduced pin-count interfaces simplify
design and lower system cost by reducing the number of layers
required to route high density solutions. 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 or TBI interfaces.
This device represents the fourth member of Broadcom's 0.13u Gigabit
copper PHY family, joining the BCM5404, BCM5421, and BCM5421S.
The 0.13u process is an aggressive process that offers the best
performance, lowest cost, and lowest power for Gigabit copper
solutions. In addition, devices based on this process offer an excellent
long-term cost curve, enabling cost reductions as the price of the 0.13u
wafers come down, without having to redesign or requalify a new part.
Each port of the
BCM5434
is fully independent and has individual
interface, control and status registers and incorporates a number of
advanced features. A link quality indicator LED gives installers an instant
visual indication if there are any problems with the wiring plant
supporting operation at the desired speed. This includes physical wiring
defects that the
BCM5434
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
BCM5434
is fully compatible with the
IEEE 802.3 standard for auto-negotiation of speed, but additionally
supports Ethernet@WireSpeed™. Ethernet@WireSpeed™ allows the
BCM5434
to force auto-negotiation to be automatically limited by the
speed that the channel can reliably support, rather than the performance of
the end equipment.
The
BCM5434
also has ESD tolerance well above typical industry
standards. This prevents ESD damage not only during manufacturing
but during CESD events in the field. Cable-sourced electrostatic
discharge (CESD) is an ESD event that occurs when an electrically
charged network cable is plugged into a network port, an issue
becoming more prevalent with recent cable installations.
Broadcom
®
, the pulse logo, and
Connecting everything
®
are trademarks of Broadcom Corporation and/or its
subsidiaries in the United States and certain other countries. All other trademarks are the property of their
respective owners.
®
BROADCOM CORPORATION
16215 Alton Parkway, P.O. Box 57013
Irvine, California 92619-7013
© 2003 by BROADCOM CORPORATION. All rights reserved.
5434-PB01-R 06.25.03
Phone: 949-450-8700
FAX: 949-450-8710
Email: info@broadcom.com
Web: www.broadcom.com
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