BCM5461 Broadcom, BCM5461 Datasheet - Page 2

• Manufacturer Part Number: BCM5461
• Description: 10/100/1000 BASE T GIGABIT COPPER TRANSCEIVER
• Manufacturer: Broadcom

General Description
Gigabit Ethernet transceiver. The BCM5461 is optimized for low power and small
footprint size to enable backplane and uplink applications. By lowering system
cost and reducing power dissipation by nearly 30%, the BCM5461 enables a new
class of cost-effective Gigabit Ethernet equipment, driving the delivery of Gigabit
bandwidth to the desktop.
The BCM5461’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 BCM5421 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 a key factor in implementing Gigabit small form factor NICs
and uplinks and, at less than 700 mW per port, the BCM5461 has the industry's
lowest power. For NIC applications, support for Wake on LAN enables
compliance with PCI 2.2 and PC99/PC2000. In addition, the BCM5461 has
extremely low EMI emissions, which reduces the design constraints required to
meet EMI emissions specifications.
In addition to supporting the IEEE 802.3 Standard Gigabit Media Independent
Interface (GMII), the BCM5461 also supports the RGMII and RTBI interfaces.
RGMII is a reduced pin-count (12 versus 25) version of the GMII, and RTBI is a
reduced pin-count version of TBI utilizing standard ASIC technology. The small
package, multiple MAC interfaces, and streamlined power supply lowers system
cost and simplifies the system and board level design.
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.
5461-PB04-R
®
RDAC
TRD [3:0]+
, the pulse logo, and Connecting everything
XTALO
XTALI
{1:2}*
04/01/04
Negotiation
Generator
16
PGA
Generator
Auto-
Clock
Bias
®
Automatic
Control
TX DAC
Gain
ADC
®
are trademarks of Broadcom Corporation and/
Canceller
Echo
FFE
O V E R V I E W
Registers
MII
Canceller
Timing &
Recovery
Decoder
XTALK
Trellis
Phase
DFE/
X3
This device is another member of Broadcom's 0.13µ Gigabit copper PHY family,
joining the BCM5404, BCM5414, BCM5421, BCM5421S, BCM5424,
BCM5434, BCM5464, and BCM5464S. The 0.13µm process is the optimal
process that offers the best performance, lowest cost, and lowest power for
Gigabit copper solutions. Further, devices based on the 0.13µ process offer an
excellent long-term cost curve, enabling better cost reduction over time,
compared to older techologies, without having to redesign or requalify a new part.
The BCM5461 incorporates a number of advanced features. The link quality
indicator LED provides installers with immediate visual notification of any
problems with the wiring plant supporting operation at the desired speed. This
includes physical wiring defects that the BCM5461 cannot automatically correct
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 first-level diagnostics and fault
isolation.
The BCM5461 also has ESD tolerance that exceeds 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 contemporary cable installations.
Control
MGMT
MII
Encoder
Decoder/
Symbol
Symbol
Aligner
RXD[7:0]
TXD[7:0]
TX_ER
GTX_CLK
TX_CLK
Modes
COL
CRS
RX_CLK
MDIO
INTR
TX_EN
RX_ER
MDC
RX_DV
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
Web: www.broadcom.com