bcm5401 Broadcom Corp., bcm5401 Datasheet - Page 2

• Manufacturer Part Number: bcm5401
• Description: 10/100/1000base-t Gigabit Ethernet Transceiver - Broadcom Corporation.
• Manufacturer: Broadcom Corp.

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.
Broadcom
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
®
, the pulse logo, and Connecting everything
07/08/04
TRD+ {3:0}
XTAL1
XTAL0
RDAC
®
Negotiation
PGA
Auto-
Automatic
Control
®
Gain
TX DAC
are trademarks of Broadcom Corporation and/
ADC
Generator
Generator
BIAS
Clock
O V E R V I E W
FFE
Registers
MMI
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.
DFE/Trellis
Exho, Next
Cancellers
Decoder
Filters &
Timing &
Recovery
& FEXT
Phase
Control
MGMT
MMI
Decoder/Aligner
Encoder
Symbol
Symbol
Drivers
LED
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
Web: www.broadcom.com
MODE
GMII or
10-bit
Interface
Link Status
MDC
MDIO
/INTR