BCM5401 Datasheet, PDF (2/2 Pages) Broadcom Corporation. – 10/100/1000BASE-T GIGABIT ETHERNET TRANSCEIVER

OVERVIEW
TRD+ {3:0}
XTAL1
XTAL0
RDAC
TX DAC
Automatic
Gain
Control
PGA
ADC
Auto-
Negotiation
Clock
Generator
BIAS
Generator
Exho, Next
& FEXT
Filters &
Cancellers
FFE
DFE/Trellis
Decoder
Timing &
Phase
Recovery
MMI
Registers
Symbol
Encoder
GMII or
10-bit
Interface
Symbol
Decoder/Aligner
LED
Drivers
MMI
MGMT
Control
Link Status
MDC
MDIO
/INTR
MODE
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 first-
generation transceivers. The device provides a complete GMII-to-
magnetics 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 low-
power requirements for PC adapters and LAN on motherboard (LOM)
applications.
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.
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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: [phone]
Fax: [phone]
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Web: www.broadcom.com