BOARDCOM BCM5401

BCM5401
®
10/100/1000BASE-T GIGABIT ETHERNET TRANSCEIVER
SUMMARY OF BENEFITS
FEATURES
• Fully integrated 10BASE-T/100BASE-TX/1000BASE-T
Gigabit Ethernet transceiver
• IEEE 802.3, 802.3u, and 802.3ab standards
• Digital Signal Processor (DSP) based design offering robust,
fully adaptive performance and simplified board design
• Field-proven design based on the BCM5400
• Register and software compatible with the BCM5400
• Advanced power management
• Low-power 1.8V digital core
• Wake on LAN support
• Integrated cable test features
• Link quality indication
• Automatic detection and correction of wiring pair swaps, pair
skew, and pair polarity
• Automatic MDI crossover
• IEEE 802.3ab standard auto-negotiation with next page
support to determine operating speed
• Internal 125-MHz low-jitter clock generation
GMII interface and 10-bit interface (TBI)
Support for jumbo packets up to 9 KB
JTAG test interface
cable plants.
• Supports 10/100/1000BASE-T applications.
• Dynamically senses and adapts to changes in the channel
conditions of the cable plant.
• Backward software compatibility with, and similar layout to,
the BCM5400 allows easy migration to the newest technology.
• Does not require heat sink or airflow.
• Allows characterization of cable plant and immediate
indication of cabling issues for 1000BASE-T.
• Simplifies installation and diagnostics of cable plants.
• Automatically configures the link to support the highest
possible speed (10/100/1000 Mbps and full-duplex or halfduplex operation).
• 125-MHz clock eliminates costly external clocking circuitry for
the MAC/ASIC.
• Compatible with any existing MAC/ASIC that supports either
an industry-standard 10-bit interface (TBI) or IEEE 802.3z
standard GMII.
• Flexible and programmable LED support.
• Includes visual link quality indicator
256-pin TBGA package
Complete 10/100/1000BASE-T Network Interface Card (NIC) Solution
BCM5401
10/100/1000 Mbps MAC
Memory
10/100/1000BASE-T
Gigabit Ethernet Transceiver
Quad Transformer
•
•
•
•
• Provides robust operation at 1000 Mbps on existing CAT 5
RJ-45
OVERVIEW
Symbol
Encoder
TX DAC
Exho, Next
& FEXT
Filters &
Cancellers
Automatic
Gain
Control
TRD+ {3:0}
PGA
ADC
FFE
Clock
Generator
MMI
Registers
BIAS
Generator
RDAC
Symbol
Decoder/Aligner
Timing &
Phase
Recovery
AutoNegotiation
XTAL1
XTAL0
DFE/Trellis
Decoder
The BCM5401 is a second-generation 10/100/1000BASE-T Gigabit
Ethernet transceiver for Category 5 unshielded twisted-pair (UTP)
wiring. Based on the field proven architecture of the BCM5400, it
provides lower power, enhanced cable reach, improved bit error rate
performance, and advanced testability and diagnostics over firstgeneration transceivers. The device provides a complete GMII-tomagnetics solution for 10BASE-T, 100BASE-TX, and 1000BASE-T. It
also provides a TBI-to-magnetics (10-bit interface) solution for designs
using fiber Gigabit Ethernet ASICS. All necessary support circuitry is
integrated, including the magnetic hybrid and an on-chip clock generator
to provide a low-jitter, 125-MHz system clock.
Low power is achieved through the use of 0.22 CMOS technology that
operates the internal analog circuitry at 2.5V and the digital logic at
1.8V, and through dynamic power management that disables unused
portions of the Digital Signal Processor (DSP) architecture when not
needed. A special Wake on LAN mode is included to support the lowpower requirements for PC adapters and LAN on motherboard (LOM)
applications.
GMII or
10-bit
Interface
LED
Drivers
MMI
MGMT
Control
Link Status
MDC
MDIO
/INTR
MODE
Enhanced cable reach and improved bit error rate performance are
achieved through advanced DSP and mixed signal design that includes
digital adaptive equalizers, encoders, decoders, forward error correction,
and cancellation circuitry for echo and crosstalk.
The BCM5401’s integrated cable management features simplify the
installation of networking equipment. The chip automatically detects and
corrects for most common network wiring problems. The Link Quality
LED provides an instant indication of uncorrectable wiring problems or
reasons such as excessive cable length, return loss, crosstalk, echo, and
channel noise. Broadcom’s remote cable management and diagnostics
software can be used with the BCM5401 to remotely characterize the
cable plant (pair length, pair polarity, pair skew, and pair alignment) and
offers a first level of fault diagnostics for cabling problems. The
performance of the link is automatically determined for either 10/100/
1000 Mbps operation at both full- or half-duplex modes using the IEEE
802.3ab standard auto-negotiation process.
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 mentioned are the
property of their respective owners.
®
BROADCOM CORPORATION
16215 Alton Parkway, P.O. Box 57013
Irvine, California 92619-7013
© 2004 by BROADCOM CORPORATION. All rights reserved.
5401-PB03-R
07/08/04
Phone: 949-450-8700
Fax: 949-450-8710
E-mail: info@broadcom.com
Web: www.broadcom.com